WOLFRAM SYSTEM MODELER

Logic

Logic values and their coding according to IEEE 1164 STD_ULOGIC type

Wolfram Language

In[1]:=

SystemModel["Modelica.Electrical.Digital.Interfaces.Logic"]

Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Code Table:

Logic value	Meaning
'U'	Uninitialized
'X'	Forcing Unknown
'0'	Forcing 0
'1'	Forcing 1
'Z'	High Impedance
'W'	Weak Unknown
'L'	Weak 0
'H'	Weak 1
'-'	Do not care

Enumeration Literals (9)

'U'	U Uninitialized
'X'	X Forcing Unknown
'0'	0 Forcing 0
'1'	1 Forcing 1
'Z'	Z High Impedance
'W'	W Weak Unknown
'L'	L Weak 0
'H'	H Weak 1
'-'	- Do not care

Used in Components (33)

	MUX4 Modelica.Electrical.Digital.Examples.Utilities 4 to 1 Bit Multiplexer
	RS Modelica.Electrical.Digital.Examples.Utilities Unclocked RS FlipFlop
	RSFF Modelica.Electrical.Digital.Examples.Utilities Unclocked RS FlipFlop
	JKFF Modelica.Electrical.Digital.Examples.Utilities JK FlipFlop
	Counter Modelica.Electrical.Digital.Examples.Utilities Generic N Bit Counter
	TransportDelay Modelica.Electrical.Digital.Delay Transport delay with initial parameter
	InertialDelay Modelica.Electrical.Digital.Delay Inertial delay with initial parameter
	InertialDelaySensitive Modelica.Electrical.Digital.Delay Provide the input as output if it holds its value for a specific amount of time
	Not Modelica.Electrical.Digital.Basic Not logic component without delay
	And Modelica.Electrical.Digital.Basic And logic component with multiple input and one output
	Nand Modelica.Electrical.Digital.Basic Nand logic component with multiple input and one output
	Or Modelica.Electrical.Digital.Basic Or logic component with multiple input and one output
	Nor Modelica.Electrical.Digital.Basic Nor logic component with multiple input and one output
	Xor Modelica.Electrical.Digital.Basic Xor logic component with multiple input and one output
	Xnor Modelica.Electrical.Digital.Basic Xnor logic component with multiple input and one output
	Set Modelica.Electrical.Digital.Sources Digital Set Source
	Step Modelica.Electrical.Digital.Sources Digital Step Source
	Table Modelica.Electrical.Digital.Sources Digital Tabular Source
	Pulse Modelica.Electrical.Digital.Sources Digital Pulse Source
	DFFR Modelica.Electrical.Digital.Registers Edge triggered register bank with reset
	DFFSR Modelica.Electrical.Digital.Registers Edge triggered register bank with set and reset
	DLATR Modelica.Electrical.Digital.Registers Level sensitive register bank with reset
	DLATSR Modelica.Electrical.Digital.Registers Level sensitive register bank with set and reset
	NXFERGATE Modelica.Electrical.Digital.Tristates Transfergate with enable active high
	NRXFERGATE Modelica.Electrical.Digital.Tristates Transfergate with enable active high. Output strength reduced.
	PXFERGATE Modelica.Electrical.Digital.Tristates Transfergate with enable active low
	PRXFERGATE Modelica.Electrical.Digital.Tristates Transfergate with enable active low. Output strength reduced.
	BUF3S Modelica.Electrical.Digital.Tristates Tristate buffer with enable active high
	BUF3SL Modelica.Electrical.Digital.Tristates Tristate buffer with enable active low
	INV3S Modelica.Electrical.Digital.Tristates Tristate Inverter with enable active high
	INV3SL Modelica.Electrical.Digital.Tristates Tristate inverter with enable active low
	WiredX Modelica.Electrical.Digital.Tristates Wired node with multiple input and one output
	MUX2x1 Modelica.Electrical.Digital.Multiplexers A two inputs MULTIPLEXER for multiple value logic (2 data inputs, 1 select input, 1 output)