In this topic:

## Introduction

This section describes the various components available and how to use them in the SIMetrix schematic environment.

## General Behaviour

### Intertial Delay

Any Input to Output delay for the new Advanced Digital components incorporates inertial delay where, if the pulse width of the incoming signal is less than the Input to Output delay of a particular device, then there is no resulting change in the output. In the example below, one of the input pulses is narrower than the input-to-output delay of a buffer logic gate. In that instance, the output of the buffer gate effectively "ignores" that one input pulse.

This inertial delay behavior describes the Delay parameter for all the Advanced Digital Logic Gates as well as the Out Delay of the Adder, Subtracter, Multiplier, Comparator and Latches and each of the delay parameters of the Analog-to-Digital Converters, Counters and Flip Flops.

None of the delay parameters of the SIMPLIS Advanced Digital components may be set to zero.

### Transport Delay

By contrast, the Classic SIMPLIS digital gates model transport delay, in which they are able to respond to any width signal at their input and reproduce that same width signal at the output after the specified delay interval.

The Classic Digital components may have their delay parameters set to zero.

### Flip-Flop Delay Parameters

This example shows an edge triggered D-type flip flop with asynchronous set and reset. In this example, Set and Reset are selected to be active high. The following diagram shows the definition of the Clk to Output Delay as well as the Set/Reset Delay. All Flip Flop devices have a Clk to Output Delay parameter and all Flip Flops with the Set and Reset feature have a Set/Reset Delay.

### Flip-Flop Minimum Clock Width

As in this example of a D-type flip flop, where the device is set to trigger on the positive going edge of the clock, if the width of the clock pulse is narrower than the specified Minimum Clock Width, the clock pulse is ignored.

### Discrete Filters

Each of these discrete filters is driven by an input clock signal. For proper operation, the input clock signal needs to be made up of a train of pulses with pulse widths equal to or wider than the "Time of Acquisition" set for the filter. For the most efficient simulation, this kind of pulses can be generated by driving periodic pulses through the "Sampling Clock Generator for Discrete Filters". If the "Sampling Clock Generator for Discrete Filters" is used to generate the input clock signals for the discrete filters, the driving periodic pulses can have pulse widths shorter than the time of acquisition as long as they are well defined pulses

If the time of acquisition is $\text{t}_{\text{ACQ}}$, then the "Sampling Clock Generator for Discrete Filters" will generate a pulse whose pulse width is equal to $\text{t}_{\text{ACQ}}$ every time its "TRIG" input makes a positive transition exceeding 3V. During this pulse, the discrete filter will sample the input data at the "IN" input pin and it will take $\text{t}_{\text{ACQ}}$ for it to satisfactorily acquire the input data. After $\text{t}_{\text{ACQ}}$ has expired, the discrete filter will update its output, and the output will settle within a time duration less than or equal to $\text{t}_{\text{ACQ}}$. In addition, during this duration when the output is updated, the output "CLK_OUT" is raised to a high value.

A discrete filter with more than two poles can be synthesized through a cascade of one-pole and/or two-pole discrete filters. In such case, the timing signal for each driven stage is derived from the "CLK_OUT" signal of the immediately preceding stage.

## D-Type Flip-Flop

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Delay Parameters). Data Type NUMBER Description Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## D-Type Flip-Flop w/ SET/RST

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Minimum Clock Width) Data Type NUMBER Description Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set/Reset Delay

 Property Name SET_RESET_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name SET_RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set/Reset Type

 Property Name SET_RESET_TYPE Data Type STRING Options SYNC, ASYNC Description Determines whether or not output events are synchronized with a clock event

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## S/R Flip-Flop

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Minimum Clock Width). Data Type NUMBER Description Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## S/R Flip-Flop w/ SET/RST

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Minimum Clock Width). Data Type NUMBER Description: Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set/Reset Delay

 Property Name SET_RESET_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name SET_RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set/Reset Type

 Property Name SET_RESET_TYPE Data Type STRING Options SYNC, ASYNC Description Determines whether or not output events are synchronized with a clock event

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## J/K Flip-Flop

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Minimum Clock Width). Data Type NUMBER Description Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## J/K Flip-Flop w/ SET/RST

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Minimum Clock Width). Data Type NUMBER Description Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set/Reset Delay

 Property Name SET_RESET_DELAY (Additional Info) Data Type NUMBER Description Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name SET_RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set/Reset Type

 Property Name SET_RESET_TYPE Data Type STRING Options SYNC, ASYNC Description Determines whether or not output events are synchronized with a clock event

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Toggle Flip-Flop

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Minimum Clock Width). Data Type NUMBER Description Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER DescriptionInput resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Toggle Flip-Flop w/ SET/RST

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY (see Flip-Flop Delay Parameters). Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the flip-flop's output

### Minimum Clk Width

 Property Name MIN_CLK (see Flip-Flop Minimum Clock Width). Data Type NUMBER Description Minimum valid clock width

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set/Reset Delay

 Property Name SET_RESET_DELAY () Data Type NUMBER Description Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name SET_RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set/Reset Type

 Property Name SET_RESET_TYPE Data Type STRING Options SYNC, ASYNC Description Determines whether or not output events are synchronized with a clock event

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## AND Gate

### Delay

 Property Name DELAY (see Inertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## NAND Gate

### Delay

 Property Name DELAY (see Intertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## OR Gate

### Delay

 Property Name DELAY (see Intertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## NOR Gate

### Delay

 Property Name DELAY (see Intertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Exclusive-OR Gate

### Delay

 Property Name DELAY (see Intertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Comparator

### Delay

 Property Name DELAY (see Intertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Buffer

### Delay

 Property Name DELAY (see Intertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Inverter

### Delay

 Property Name DELAY (see Intertial Delay). Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the gate's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

### Code

 Property Name CODE Data Type STRING Options UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description Encoding scheme for binary inputs / outputs for multi-pin I/O

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Initial Condition of Overflow

 Property Name IC_OFL Data Type STRING Options POS, NEG, NONE Description Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Output Delay

 Property Name OUT_DELAY Data Type NUMBER Description Delay from when the input state changes until output changes

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Subtracter

### Code

 Property Name CODE Data Type STRING Options UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description Encoding scheme for binary inputs / outputs for multi-pin I/O

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Initial Condition of Overflow

 Property Name IC_OFL Data Type STRING Options POS, NEG, NONE Description Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Output Delay

 Property Name OUT_DELAY Data Type NUMBER Description Delay from when the input state changes until output changes

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Multiplier

### Code

 Property Name CODE Data Type STRING Options UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description Encoding scheme for binary inputs / outputs for multi-pin I/O

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Num. Bits A

 Property Name NUMBITS_A Data Type INTEGER Description Number of bits for the first input of a multi-input device

### Num. Bits B

 Property Name NUMBITS_B Data Type INTEGER Description Number of bits for the second input of a multi-input device

### Output Delay

 Property Name OUT_DELAY Data Type NUMBER Description Delay from when the input state changes until output changes

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance Output Resistance Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Divider

### Code

 Property Name: CODE Data Type: STRING Options: UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description: Encoding scheme for binary inputs / outputs for multi-pin I/O

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the function's output

### Initial Condition of Overflow

 Property Name: IC_OFL Data Type: STRING Options: POS, NEG, NONE Description: Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

### Initial Condition of Remainder

 Property Name: IC_REMAINDER Data Type: NUMBER Description: Initial condition of the remainder outputs of a divider

### Num. Bits A

 Property Name: NUMBITS_A Data Type: INTEGER Description: Number of bits for the first input of a multi-input device

### Num. Bits B

 Property Name: NUMBITS_B Data Type: INTEGER Description: Number of bits for the second input of a multi-input device

### Output Delay

 Property Name: OUT_DELAY Data Type: NUMBER Description: Delay from when the input state changes until output changes

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Fixed Point Divider

### Code

 Property Name: CODE Data Type: STRING Options: UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description: Encoding scheme for binary inputs / outputs for multi-pin I/O

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the function's output

### Initial Condition of Overflow

 Property Name: IC_OFL Data Type: STRING Options: POS, NEG, NONE Description: Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

### Num. Bits A

 Property Name: NUMBITS_A Data Type: INTEGER Description: Number of bits for the first input of a multi-input device

### Num. Bits B

 Property Name: NUMBITS_B Data Type: INTEGER Description: Number of bits for the second input of a multi-input device

### Num. Bits C

 Property Name: NUMBITS_C Data Type: INTEGER Description: Number of bits for the output of a fixed point divider

### Output Delay

 Property Name: OUT_DELAY Data Type: NUMBER Description: Delay from when the input state changes until output changes

 Property Name: RADIX_POS_A Data Type: NUMBER Description: Radix position for the first input of a fixed point divider

 Property Name: RADIX_POS_B Data Type: NUMBER Description: Radix position for the second input of a fixed point divider

 Property Name: RADIX_POS_C Data Type: NUMBER Description: Radix position for the output of a fixed point divider

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Round Mode

 Property Name: ROUND_MODE Data Type: STRING Options: UP, DOWN, CEILING, FLOOR, HALF_UP, HALF_DOWN, HALF_EVEN Description: Rounding mode for a digital fixed point divider

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Analog to Digital Converter - Operation

This is a 1-32 bit analog to digital converter. The operation of this device is illustrated by the following diagrams:

### Conversion Timing

The ADC starts the conversion at the rising or falling edge of the clock, depending on the selected value of the Trigger Condition. The sampling of the analog input signal begins at this point. The sampling of the input is complete after an interval of Sample delay. The output data changes in response to this, Convert Time seconds after the clock trigger event. At the same time that the output initially changes, the Data ready output goes low (inactive) then high again after a delay equal to Data ready delay. It is possible to start a new conversion before the previous conversion is complete provided it is started later than Minimum clock width seconds after the previous conversion was started. Minimum clock width must always be less than Convert Time. If the Minimum clock width specification is violated, the conversion will not start.

## Analog to Digital Converter - Parameters

### Code

 Property Name CODE Data Type STRING Options UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description Encoding scheme for binary inputs / outputs for multi-pin I/O

### Convert Time

 Property Name CONVERT_TIME Data Type NUMBER Description Time required to convert analog input to digital output

 Property Name DATA_READY_DELAY Data Type NUMBER Description Delay from time when the output changes until the Data Ready signal is true

### Enable Delay

 Property Name ENABLE_DELAY Data Type NUMBER Description Delay from time enable pin goes active until output is enabled Hysteresis Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Initial Condition of Overflow

 Property Name IC_OFL Data Type STRING Options POS, NEG, NONE Description Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

### Minimum Clk Width

 Property Name MIN_CLK Data Type NUMBER Description Minimum valid clock width

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Offset

 Property Name OFFSET Data Type NUMBER Description Midpoint of analog output voltage range

### Range

 Property Name RANGE Data Type NUMBER Description Analog output voltage range

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Sample delay

 Property Name SAMPLE_DELAY Data Type NUMBER Description Time required to sample analog input

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage Trigger Condition Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Analog to Digital Converter w/ Adjustable Voltage Reference - Operation

This is a 1-32 bit analog to digital converter. The operation of this device for the most part identical to the Analog to Digital Converter described above. As shown in this figure , the major difference is that the range and offset of this device is controlled by the voltage on the analog reference pin VREF.

### Input Range and Offset:

This ADC has an Analog Reference that determines the Input Voltage Range and the Input Voltage Offset based on the value of the analog voltage present between the VREF and RTN pins. The voltage at the VREF pin must always be positive and greater than zero. The Input Voltage Range is equal to the voltage between the VREF and RTN pins while the Input Voltage Offset is equal to 1/2 of the Input Voltage Range.

## Analog to Digital Converter w/ Adjustable Voltage Reference - Parameters

### Code

 Property Name CODE Data Type STRING Options UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description Encoding scheme for binary inputs / outputs for multi-pin I/O

### Convert Time

 Property Name CONVERT_TIME Data Type NUMBER Description Time required to convert analog input to digital output

 Property Name DATA_READY_DELAY Data Type NUMBER Description Delay from time when the output changes until the Data Ready signal is true

### Enable Delay

 Property Name ENABLE_DELAY Data Type NUMBER Description Delay from time enable pin goes active until output is enabled

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Initial Condition of Overflow

 Property Name IC_OFL Data Type STRING Options POS, NEG, NONE Description Initial condition of the overflow outputs of a device, POS means POFL high, NEG means NOFL high, and NONE means both POFL and NOFL are low

### Minimum Clk Width

 Property Name MIN_CLK Data Type NUMBER Description Minimum valid clock width

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Sample delay

 Property Name SAMPLE_DELAY Data Type NUMBER Description Time required to sample analog input

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Digital to Analog Converter (Non-clocked)

### Code

 Property Name: CODE Data Type: STRING Options: UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description: Encoding scheme for binary inputs / outputs for multi-pin I/O

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the converter's output

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Delay

 Property Name: OUT_DELAY Data Type: NUMBER Description: Delay from when the input state changes until output changes

### Offset

 Property Name: OUTPUT_OFFSET Data Type: NUMBER Description: Midpoint of analog output voltage range

### Range

 Property Name: OUTPUT_RANGE Data Type: NUMBER Description: Analog output voltage range

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

## Digital Pulse Source

 Compl. Output Property Name COMP Data Type STRING Options Y, N Description Determines whether or not a device has a complementary output

### Start Delay

 Property Name DELAY Data Type NUMBER Description Delay from time an input pin goes active until output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Period (0 for single pulse)

 Property Name PERIOD Data Type NUMBER Description Pulse generator oscillation period

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

### Pulse Width

 Property Name WIDTH Data Type NUMBER Description Time interval between the leading edge and trailing edge of a pulse signal

## Digital Signal Source

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Redefine Source?

 Property Name: REDEFINE_SOURCE Data Type: BOOLEAN Options: YES, NO Description: If set to true, the user will be prompted to edit the function definition or to choose a new definition file, depending on the value of SOURCE_DEF

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Source Definition

 Property Name: SOURCE_DEF Data Type: STRING Options: Dialog, File Description: Determines whether the definition of the function comes from a dialog or an external file

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Asymmetric Delay

### Fall Delay

 Property Name FALL_DELAY Data Type NUMBER Description Delay from falling edge of the input until the output changes

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Rise Delay

 Property Name RISE_DELAY Data Type NUMBER Description Delay from rising edge of input until the output changes

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Digital Comparator

### Code

 Property Name CODE Data Type STRING Options UNSIGNED, TWOS_COMPLEMENT, BINARY_OFFSET Description Encoding scheme for binary inputs / outputs for multi-pin I/O

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Output Delay

 Property Name OUT_DELAY Data Type NUMBER Description Delay from when the input state changes until output changes

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Digital Constant

### Format

 Property Name FORMAT Data Type STRING Options DECIMAL, BINARY, HEX Description Determines the input formatting of the VALUE parameter of a digital constant

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Value

 Property Name VALUE Data Type INTEGER Description Output value of a digital constant

## Digital Lookup Table

### Default Value

 Property Name: DEFAULT Data Type: NUMBER Description: Default value of a digital funtion

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the function's output

### Num. Bits In

 Property Name: NUMBITS_A Data Type: INTEGER Description: Number of input bits for a digital lookup table

### Num. Bits Out

 Property Name: NUMBITS_B Data Type: INTEGER Description: Number of output bits for a digital lookup table

### Output Delay

 Property Name: OUT_DELAY Data Type: NUMBER Description: Delay from when the input state changes until output changes

### Redefine Table?

 Property Name: REDEFINE_SOURCE Data Type: BOOLEAN Options: YES, NO Description: If set to true, the user will be prompted to edit the function definition or to choose a new definition file, depending on the value of SOURCE_DEF

### Source Definition

 Property Name: SOURCE_DEF Data Type: STRING Options: Dialog, File Description: Determines whether the definition of the function comes from a dialog or an external file

## Digital Lookup Table allowing Don't Care in Input Definition

### Default Value

 Property Name: DEFAULT Data Type: NUMBER Description: Default value of a digital funtion

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the function's output

### Num. Bits In

 Property Name: NUMBITS_A Data Type: INTEGER Description: Number of input bits for a digital lookup table

### Num. Bits Out

 Property Name: NUMBITS_B Data Type: INTEGER Description: Number of output bits for a digital lookup table

### Output Delay

 Property Name: OUT_DELAY Data Type: NUMBER Description: Delay from when the input state changes until output changes

### Redefine Table?

 Property Name: REDEFINE_SOURCE Data Type: BOOLEAN Options: YES, NO Description: If set to true, the user will be prompted to edit the function definition or to choose a new definition file, depending on the value of SOURCE_DEF

## Digital Mux

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the function's output

### Inversion?

 Property Name: INVERSION Data Type: STRING Options: Y,N Description: Determines whether or not the output reflects the actual or inverted states of the inputs

### Number of Bits per Input

 Property Name: NUM_BITS Data Type: INTEGER Description: Number of bits for a multi-bit device

### Number of Inputs

 Property Name: NUM_INPUTS Data Type: INTEGER Description: Number of inputs for a multi-input device

### Delay

 Property Name: OUT_DELAY Data Type: NUMBER Description: Delay from when the input state changes until output changes

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Digital Demux

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the function's output

### Inactive Level

 Property Name: INACTIVE_LEVEL Data Type: INTEGER Options: 0, 1 Description: State of unselected outputs for a digital demuxer

### Inversion?

 Property Name: INVERSION Data Type: STRING Options: Y,N Description: Determines whether or not the output reflects the actual or inverted states of the inputs

### Number of Bits per Output

 Property Name: NUM_BITS Data Type: INTEGER Description: Number of bits for a multi-bit device

### Number of Outputs

 Property Name: NUM_OUTPUTS Data Type: INTEGER Description: Number of outputs for a multi-output device

### Delay

 Property Name: OUT_DELAY Data Type: NUMBER Description: Delay from when the input state changes until output changes

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Up Counter

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Enable Delay

 Property Name ENABLE_DELAY Data Type NUMBER Description Delay from time enable pin goes active until output is enabled

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Minimum Clk Width

 Property Name MIN_CLK Data Type NUMBER Description Minimum valid clock width

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Reset delay

 Property Name RESET_DELAY Data Type NUMBER Description Delay from time reset pin goes active until output is reset

### Reset Level

 Property Name RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the reset level of a device, 1 means active high, 0 means active low

### Reset Type

 Property Name RESET_TYPE Data Type STRING Options SYNC, ASYNC Description Determines whether or not output events are synchronized with a clock event

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Down Counter

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY Data Type NUMBER Description Delay from triggering edge of clock until output changes

### Enable Delay

 Property Name ENABLE_DELAY Data Type NUMBER Description Delay from time enable pin goes active until output is enabled

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name HOLD_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Description Initial condition of the function's output

### Minimum Clk Width

 Property Name MIN_CLK Data Type NUMBER Description Minimum valid clock width

### Num. Bits

 Property Name NUMBITS Data Type INTEGER Description Number of input or output bits of a device, depending on the device

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set delay

 Property Name SET_DELAY Data Type NUMBER Description Delay from time set pin goes active until output is set

### Set Level

 Property Name SET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set level of a device, 1 means active high, 0 means active low

### Set Type

 Property Name SET_TYPE Data Type STRING Options SYNC, ASYNC Description Determines whether or not output events are synchronized with a clock event

### Setup Time

 Property Name SETUP_TIME Data Type NUMBER Description Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Trigger Condition

 Property Name TRIG_COND Data Type STRING Options 0_TO_1, 1_TO_0 Description Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Up/Down Counter

### Clk to Output Delay

 Property Name: CLK_TO_OUT_DELAY Data Type: NUMBER Description: Delay from triggering edge of clock until output changes

### Enable Delay

 Property Name: ENABLE_DELAY Data Type: NUMBER Description: Delay from time enable pin goes active until output is enabled

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name: HOLD_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the counter's output

### Minimum Clk Width

 Property Name: MIN_CLK Data Type: NUMBER Description: Minimum valid clock width

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Reset To

 Property Name: RESET_TO Data Type: NUMBER Description: Determines the value of the counter to be assigned when the reset pin goes active, assign value of -1 to ignore

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Set/Reset Delay

 Property Name: SET_RESET_DELAY Data Type: NUMBER Description: Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name: SET_RESET_LEVEL Data Type: INTEGER Options: 0, 1 Description: Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set/Reset Type

 Property Name: SET_RESET_TYPE Data Type: STRING Options: SYNC, ASYNC Description: Determines whether or not output events are synchronized with a clock event

### Set To

 Property Name: SET_TO Data Type: NUMBER Description: Determines the value of the counter to be assigned when the set pin goes active, assign value of -1 to ignore

### Setup Time

 Property Name: SETUP_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Trigger Condition

 Property Name: TRIG_COND Data Type: STRING Options: 0_TO_1, 1_TO_0 Description: Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## D-Type Latch

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the latch's output

### Delay

 Property Name OUT_DELAY Data Type NUMBER Description Delay from when the input state changes until output changes

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set/Reset Delay

 Property Name SET_RESET_DELAY Data Type NUMBER Description Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name SET_RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set / reset level of a device, 1 means active high, 0 means active low

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## S/R Latch

### S/R Dominance

 Property Name DOM Data Type STRING Options S, R, NONE Description Determines the dominance of a latch

### Enable

 Property Name ENABLE Data Type STRING Options Y, N Description Determines whether or not a device has an enable pin

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the latch's output

### Delay

 Property Name OUT_DELAY Data Type NUMBER Description Delay from when the input state changes until output changes

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set/Reset Level

 Property Name SET_RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set / reset level of a device, 1 means active high, 0 means active low

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## S/R Latch w/ Enable

### S/R Dominance

 Property Name DOM Data Type STRING Options S, R, NONE Description Determines the dominance of a latch

### Enable

 Property Name ENABLE Data Type STRING Options Y, N Description Determines whether or not a device has an enable pin

### Ground Ref

 Property Name GNDREF Data Type STRING Options Y, N Description Determines whether or not a device has a ground reference pin

### Hysteresis

 Property Name HYSTWD Data Type NUMBER Description Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name IC Data Type NUMBER Options 0, 1 Description Initial condition of the latch's output

### Delay

 Property Name OUT_DELAY Data Type NUMBER Description Delay from when the input state changes until output changes

### Input Resistance

 Property Name RIN Data Type NUMBER Description Input resistance

### Output Resistance

 Property Name ROUT Data Type NUMBER Description Output resistance

### Set/Reset Level

 Property Name SET_RESET_LEVEL Data Type INTEGER Options 0, 1 Description Determines the set / reset level of a device, 1 means active high, 0 means active low

### Threshold

 Property Name TH Data Type NUMBER Description Threshold voltage

### Output High Voltage

 Property Name VOH Data Type NUMBER Description Output high voltage

### Output Low Voltage

 Property Name VOL Data Type NUMBER Description Output low voltage

## Data Register

### Clk to Output Delay

 Property Name CLK_TO_OUT_DELAY Data Type: NUMBER Description: Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name: HOLD_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the register's output

 Property Name: LOAD_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the load level of a device, 1 means load on high, 0 means load on low.

### Minimum Clk Width

 Property Name: MIN_CLK Data Type: NUMBER Description: Minimum valid clock width

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Reset To (Async)

 Property Name: RESET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous reset pin goes active

### Reset To (Sync)

 Property Name: RESET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous reset pin goes active

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Set/Reset Delay

 Property Name: SET_RESET_DELAY Data Type: NUMBER Description: Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name: SET_RESET_LEVEL Data Type: INTEGER Options: 0, 1 Description: Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set To (Async)

 Property Name: SET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous set pin goes active

### Set To (Sync)

 Property Name: SET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous set pin goes active

### Setup Time

 Property Name: SETUP_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Trigger Condition

 Property Name: TRIG_COND Data Type: STRING Options: 0_TO_1, 1_TO_0 Description: Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Shift Register

### Clk to Output Delay

 Property Name: CLK_TO_OUT_DELAY Data Type: NUMBER Description: Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name: GNDREF Data Type: S TRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name: HOLD_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the register's output

### Left/Right_Level

 Property Name: LEFT_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the left/right level of a device, 1 means shift left on high and shift right on low, 0 means shift left on low and shift right on high.

 Property Name: LOAD_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the load/shift level of a device, 1 means load on high and shift on low, 0 means load on low and shift on high.

### Minimum Clk Width

 Property Name: MIN_CLK Data Type: NUMBER Description: Minimum valid clock width

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Reset To (Async)

 Property Name: RESET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous reset pin goes active

### Reset To (Sync)

 Property Name: RESET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous reset pin goes active

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Set/Reset Delay

 Property Name: SET_RESET_DELAY Data Type: NUMBER Description: Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name: SET_RESET_LEVEL Data Type: INTEGER Options: 0, 1 Description: Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set To (Async)

 Property Name: SET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous set pin goes active

### Set To (Sync)

 Property Name: SET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous set pin goes active

### Setup Time

 Property Name: SETUP_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Trigger Condition

 Property Name: TRIG_COND Data Type: STRING Options: 0_TO_1, 1_TO_0 Description: Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Shift Register (Left)

### Clk to Output Delay

 Property Name: CLK_TO_OUT_DELAY Data Type: NUMBER Description: Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name: HOLD_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the register's output

 Property Name: LOAD_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the load/shift level of a device, 1 means load on high and shift on low, 0 means load on low and shift on high.

### Minimum Clk Width

 Property Name: MIN_CLK Data Type: NUMBER Description: Minimum valid clock width

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Reset To (Async)

 Property Name: RESET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous reset pin goes active

### Reset To (Sync)

 Property Name: RESET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous reset pin goes active

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Set/Reset Delay

 Property Name: SET_RESET_DELAY Data Type: NUMBER Description: Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name: SET_RESET_LEVEL Data Type: INTEGER Options: 0, 1 Description: Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set To (Async)

 Property Name: SET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous set pin goes active

### Set To (Sync)

 Property Name: SET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous set pin goes active

### Setup Time

 Property Name: SETUP_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Trigger Condition

 Property Name: TRIG_COND Data Type: STRING Options: 0_TO_1, 1_TO_0 Description: Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Shift Register (Right)

### Clk to Output Delay

 Property Name: CLK_TO_OUT_DELAY Data Type: NUMBER Description: Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name: HOLD_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the register's output

 Property Name: LOAD_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the load/shift level of a device, 1 means load on high and shift on low, 0 means load on low and shift on high.

### Minimum Clk Width

 Property Name: MIN_CLK Data Type: NUMBER Description: Minimum valid clock width

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Reset To (Async)

 Property Name: RESET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous reset pin goes active

### Reset To (Sync)

 Property Name: RESET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous reset pin goes active

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Set/Reset Delay

 Property Name: SET_RESET_DELAY Data Type: NUMBER Description: Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name: SET_RESET_LEVEL Data Type: INTEGER Options: 0, 1 Description: Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set To (Async)

 Property Name: SET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous set pin goes active

### Set To (Sync)

 Property Name: SET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous set pin goes active

### Setup Time

 Property Name: SETUP_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Trigger Condition

 Property Name: TRIG_COND Data Type: STRING Options: 0_TO_1, 1_TO_0 Description: Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Shift Register (Multi-bit)

### Clk to Output Delay

 Property Name: CLK_TO_OUT_DELAY Data Type: NUMBER Description: Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name: HOLD_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the register's output

### Left/Right_Level

 Property Name: LEFT_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the left/right level of a device, 1 means shift left on high and shift right on low, 0 means shift left on low and shift right on high.

 Property Name: LOAD_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the load/shift level of a device, 1 means load on high and shift on low, 0 means load on low and shift on high.

### Minimum Clk Width

 Property Name: MIN_CLK Data Type: NUMBER Description: Minimum valid clock width

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Reset To (Async)

 Property Name: RESET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous reset pin goes active

### Reset To (Sync)

 Property Name: RESET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous reset pin goes active

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Set/Reset Delay

 Property Name: SET_RESET_DELAY Data Type: NUMBER Description: Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name: SET_RESET_LEVEL Data Type: INTEGER Options: 0, 1 Description: Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set To (Async)

 Property Name: SET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous set pin goes active

### Set To (Sync)

 Property Name: SET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous set pin goes active

### Setup Time

 Property Name: SETUP_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Trigger Condition

 Property Name: TRIG_COND Data Type: STRING Options: 0_TO_1, 1_TO_0 Description: Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## Barrel Shifter

### Clk to Output Delay

 Property Name: CLK_TO_OUT_DELAY Data Type: NUMBER Description: Delay from triggering edge of clock until output changes

### Ground Ref

 Property Name: GNDREF Data Type: STRING Options: Y, N Description: Determines whether or not a device has a ground reference pin

### Hold Time

 Property Name: HOLD_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant after triggering clock edge to register as a valid change in input state

### Hysteresis

 Property Name: HYSTWD Data Type: NUMBER Description: Hysteretic-window width centered around TH (Threshold voltage)

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the register's output

### Left/Right_Level

 Property Name: LEFT_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the left/right level of a device, 1 means shift left on high and shift right on low, 0 means shift left on low and shift right on high.

 Property Name: LOAD_LEVEL Data Type: INTEGER Options: 0,1 Description: Determines the load/shift level of a device, 1 means load on high and shift on low, 0 means load on low and shift on high.

### Minimum Clk Width

 Property Name: MIN_CLK Data Type: NUMBER Description: Minimum valid clock width

### Num. Bits

 Property Name: NUMBITS Data Type: INTEGER Description: Number of input or output bits of a device, depending on the device

### Reset To (Async)

 Property Name: RESET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous reset pin goes active

### Reset To (Sync)

 Property Name: RESET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous reset pin goes active

### Input Resistance

 Property Name: RIN Data Type: NUMBER Description: Input resistance

### Output Resistance

 Property Name: ROUT Data Type: NUMBER Description: Output resistance

### Set/Reset Delay

 Property Name: SET_RESET_DELAY Data Type: NUMBER Description: Delay from time set / reset pin goes active until output is set / reset

### Set/Reset Level

 Property Name: SET_RESET_LEVEL Data Type: INTEGER Options: 0, 1 Description: Determines the set / reset level of a device, 1 means active high, 0 means active low

### Set To (Async)

 Property Name: SET_TO_ASYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the asynchronous set pin goes active

### Set To (Sync)

 Property Name: SET_TO_SYNC Data Type: NUMBER Description: Determines the value of the device to be assigned when the synchronous set pin goes active

### Setup Time

 Property Name: SETUP_TIME Data Type: NUMBER Description: Minimum time that input data signals must remain constant before triggering clock edge to register as a valid change in input state

### Threshold

 Property Name: TH Data Type: NUMBER Description: Threshold voltage

### Trigger Condition

 Property Name: TRIG_COND Data Type: STRING Options: 0_TO_1, 1_TO_0 Description: Determines the triggering condition of the clock pin, either the rising edge or the falling edge

### Output High Voltage

 Property Name: VOH Data Type: NUMBER Description: Output high voltage

### Output Low Voltage

 Property Name: VOL Data Type: NUMBER Description: Output low voltage

## 1-Pole Discrete Filter - Operation

The transfer function in the z-domain from the input I(z) to the output O(z) for the one-pole discrete filter is:

$T(z) = \frac{O(z)}{I(z)} = \frac{N1\cdot z + N0}{z + D0} = \frac{N1 + N0\cdot z^{-1}}{1 + D0\cdot z^{-1}}$

The difference equation representing this transfer function is:

$O(n) + D0\cdot O(n-1) = N1\cdot I(n) + N0\cdot I(n-1)$

For example, if N1, N0, and D0 have been set to 0, 0.1, and -0.99, respectively, the resulting one-pole discrete filter will have a DC gain of 10.0 and a pole located at 0.99.

The parameters required for the discrete filter can be found in the device documentation below.

## 1-Pole Discrete Filter - Parameters

### D0

 Property Name: D0 Data Type STRING Description Denominator coefficient

### Initial Condition

 Property Name: IC Data Type NUMBER Description Initial condition of the filter's output

### N0

 Property Name: N0 Data Type STRING Description Numerator coefficient

### N1

 Property Name: N1 Data Type STRING Description Numerator coefficient

### Acquisition Time in seconds

 Property Name: T_ACQ Data Type NUMBER Description Acquistion Time

## 2-Pole Discrete Filter - Operation

The transfer function in the z-domain for the two-pole discrete filter is:

$T(z) = \frac{N2\cdot z^2 + N1\cdot z + N0}{z^2 + D1\cdot z + D0} = \frac{N2 + N1\cdot z^{-1} + N0\cdot z^{-2}}{1 + D1\cdot z^{-1} + D0\cdot z^{-2}}$

The difference equation representing this transfer function is:

$O(n) + D1\cdot O(n-1) + D0\cdot O(n-2) = N2\cdot I(n) + N1\cdot I(n-1) + N0\cdot I(n-2)$

The parameters required for the discrete filter can be found in the device documentation.

## 2-Pole Discrete Filter - Parameters

### D0

 Property Name: D0 Data Type STRING Description Denominator coefficient

### D1

 Property Name: D1 Data Type STRING Description Denominator coefficient

### Initial Condition

 Property Name: IC Data Type NUMBER Description Initial condition of the filter's output

### N0

 Property Name: N0 Data Type STRING Description Numerator coefficient

### N1

 Property Name: N1 Data Type STRING Description Numerator coefficient

### N2

 Property Name: N2 Data Type STRING Description Numerator coefficient

### Acquisition Time in seconds

 Property Name: T_ACQ Data Type NUMBER Description Acquistion Time

## PID Discrete Filter - Operation

The transfer function for an analog PID filter is:

$T(s) = K_{PA} + \frac{K_{IA}}{s} + K_{DA}s \tag{1}$

where the A in the three coefficients $K_{PA}$, $K_{IA}$, and $K_{DA}$ are used to signify that these are the coefficients associated with Eq. (1), which is defined for the analog PID filter.

Since (1) has two zeroes and one pole, there are more zeroes than poles, resulting in an improper transfer function / filter. A pole is sometimes added to the derivative term to limit the bandwidth at higher frequencies. One form for such a PID filter with a pole added for the derivative action is:

$T(s) = K_{PA} + \dfrac{K_{IA}}{s} + \dfrac{K_{DA}s}{\gamma K_{DA}s + 1} \tag{2}$

In the discrete PID filter provided, the implemented transfer function is:

$T(z) = K_P + \frac{K_I}{S_1(z)} + \frac{K_DS_D(z)}{\gamma K_DS_D(z) + 1} \tag{3}$

where $K_P$, $K_I$, and $K_D$ are coefficients entered by the user. To match the frequency response of the discrete PID filter represented by (3) to the frequency response of the analog PID filter represented by (2), a first-order approximation is to set

$K_P = K_{PA}$ $K_I = K_{IA}.T_{\text{SAMPLING}}$ $K_D = K_{DA}/T_{\text{SAMPLING}} \tag{4}$

where $T_{\text{SAMPLING}}$ is the sampling period. If this first-order approximation is used, the frequency response for (3) will have a very good match with the frequency response for (2), as long as the poles and zeroes of (3) are more than two decades below the sampling frequency.

The functions $S_I(z)$ and $S_D(z)$ are transfer functions in the z-domain according to the integration and derivative methods selected, respectively. The choices for the method are "Forward-Euler,""Backward-Euler," and "Trapezoidal."

$S_I(z),S_D(z) = \left\{ \begin{array}{ll} z-1 & \text{Forward Euler} \\ \dfrac{z-1}{z} & \text{Backward Euler} \\ \dfrac{2(z-1)}{z+1} & \text{Trapezoidal} \end{array} \right. \tag{5}$

The integration and the derivative methods are sometimes referred to as the mapping / transformation in the literature. Mapping and transformation are easy and simple ways to generate discrete or digital filters with frequency responses that are approximates of the frequency response of the original s-domain analog filter. The approximation is reasonable if the poles and zeros of the original analog filter are more than two decades below the sampling frequency.

Due to the nature of (3) and (5), the discrete PID filter has two poles in the z-domain, one from the integration term, and one from the derivative term. The pole from the integration term is always located at z=1 and the pole due to the derivative term is located at:

$P_{D,Z} = \left\{ \begin{array}{ll} \dfrac{\gamma K_D-1}{\gamma K_D} & \text{Forward Euler}\\ \dfrac{\gamma K_D}{\gamma K_D + 1} & \text{Backward Euler} \\ \dfrac{\gamma 2\gamma K_D -1}{2\gamma K_D + 1} & \text{Trapeziodal} \end{array} \right. \tag{6}$

Since the location of this pole should not yield unstable responses, at the very minimum, the restraint on $P_{D,Z}$ is:

$0 \leq P_{D,Z} \leq 1 \tag{7}$

From (6) and (7), the restriction placed on the product $Y_{KD}$ is:

$\gamma K_D \geq \left\{ \begin{array}{ll} 1 & \text{Forward Euler} \\ 0 & \text{Backward Euler} \\ 0.5 & \text{Trapeziodal} \end{array} \right. \tag{8}$

Once the value of $P_{D,Z}$ is set, Y can be computed from (6). The corresponding pole location in the s-domain for the pole $P_{D,Z}$ in the z-domain is:

$P_{D,S} = \frac{\ln(P_{D,S})}{T_{\text{SAMPLING}}} \tag{9}$

If $P_{D,Z}$ is set to 0.5, the corresponding pole in the s-domain would have a corner frequency of about 0.11 of the sampling frequency.

If there are already extra low-pass filter(s) along the path of feedback, it may be desirable not to introduce the extra pole associated with the derivative term in the discrete PID filter described here. While it is not exactly the same as removing the extra pole, placing $P_{D,Z}$ at $z=0.0$, the center of the origin of the complex plane, has almost the same net effect. Such a pole will have no effect on the magnitude of the derivative term, but it will introduce a phase delay to the derivative term. Such a phase delay is minimal until the signal of interest is at or above one-tenth of the sampling frequency.

If the poles and zeros of the original analog PID filter are well below the sampling frequency, then the three integration methods yield essentially the same result and the three derivative methods yield essentially the same result. The three methods were provided as a convenience if the user is using one of the three mappings or transformations as a quick way to implement a discrete PID filter when the desired analog PID transfer function has been established.

In addition, if one is using one of the three mappings, or transformations, the derivative method should be set to the same as the integration method. The two methods are allowed to be different here in case the user does not come from the point of view of mapping or transformation, but from the point of view of how to implement the integration and how to derive the derivative from the input samples.

The parameters required for the discrete filter can be found in the device documentation following.

## PID Discrete Filter - Parameters

### Derivative Method

 Property Name: DERIVATIVE_METHOD Data Type: STRING Options: FORWARD_EULER, BACKWARD_EULER, TRAPEZOIDAL Description: Derivative method

### Pole Factor

 Property Name: GAMMA Data Type: NUMBER Description: Pole factor for derivative

### Initial Condition

 Property Name: IC Data Type: NUMBER Description: Initial condition of the filter's output

### Integration Method

 Property Name: INTEGRATION_METHOD Data Type: STRING Options: FORWARD_EULER, BACKWARD_EULER, TRAPEZOIDAL Description: Integration method

### KD

 Property Name: KD Data Type: NUMBER Description: Coefficient

### KI

 Property Name: KI Data Type: NUMBER Description: Coefficient

### KP

 Property Name: KP Data Type: NUMBER Description: Coefficient

### Acquisition Time in sec.

 Property Name: T_ACQ Data Type: NUMBER Description: Acquisition Time