Package Modelica.​Electrical.​Digital.​Interfaces
Basic definitions

Information

This package contains basic definitions: Type definitions of Logic and Strength, interface definitions (connectors) for digital electrical components, and partial models for connection patterns which are often used.

Extends from Modelica.​Icons.​InterfacesPackage (Icon for packages containing interfaces).

Package Contents

NameDescription
DigitalInputInput DigitalSignal as connector
DigitalOutputOutput DigitalSignal as connector
DigitalSignalDigital port (both input/output possible)
LogicLogic values and their coding according to IEEE 1164 STD_ULOGIC type
MemoryBaseBase model for memory elements
MIMOMultiple input - multiple output
MISOMultiple input - single output
SISOSingle input, single output
StrengthOutput strengths of registers
UX014-valued subtype of IEEE 1164 STD_ULOGIC type

Enumeration Modelica.​Electrical.​Digital.​Interfaces.​Logic
Logic values and their coding according to IEEE 1164 STD_ULOGIC type

Information

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

Literals

NameDescription
'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

Enumeration Modelica.​Electrical.​Digital.​Interfaces.​UX01
4-valued subtype of IEEE 1164 STD_ULOGIC type

Information

Code Table:

Logic value Meaning
'U' Uninitialized
'X' Forcing Unknown
'0' Forcing 0
'1' Forcing 1

Literals

NameDescription
'U'U Uninitialized
'X'X Forcing Unknown
'0'0 Forcing 0
'1'1 Forcing 1

Enumeration Modelica.​Electrical.​Digital.​Interfaces.​Strength
Output strengths of registers

Information

Strength Table:

Strength Output conversion to
'S_X01' Forcing X, 0, 1
'S_X0H' Forcing X, 0 and Weak 1
'S_XL1' Forcing X, 1 and Weak 0
'S_X0Z' Forcing X, 0 and High Impedance
'S_XZ1' Forcing X, 1 and High Impedance
'S_WLH' Weak X, 0, 1
'S_WLZ' Weak X, 0 and High Impedance
'S_WZH' Weak X, 1 and High Impedance
'S_W0H' Weak X, 1 and Forcing 0
'S_WL1' Weak X, 0 and Forcing 1

Literals

NameDescription
'S_X01'S_X01 Forcing X, 0 and 1
'S_X0H'S_X0H Forcing X, 0 and Weak 1
'S_XL1'S_XL1 Forcing X, 1 and Weak 0
'S_X0Z'S_X0Z Forcing X, 0 and High Impedance
'S_XZ1'S_XZ1 Forcing X, 1 and High Impedance
'S_WLH'S_WLH Weak X, 0 and 1
'S_WLZ'S_WLZ Weak X, 0 and High Impedance
'S_WZH'S_WZH Weak X, 1 and High Impedance
'S_W0H'S_W0H Weak X, 1 and Forcing 0
'S_WL1'S_WL1 Weak X, 0 and Forcing 1

Connector Modelica.​Electrical.​Digital.​Interfaces.​DigitalSignal
Digital port (both input/output possible)

Information

DigitalSignal is the basic digital connector definition. A direction (input, output) is not yet defined. DigitalSignal is of type Logic. It can have the logic values (U, X, 0, 1, ...) which are internally coded by integer values by using the enumeration (c.f. the definition of type Logic).

Extends from Modelica.​Electrical.​Digital.​Interfaces.​Logic (Logic values and their coding according to IEEE 1164 STD_ULOGIC type).


Connector Modelica.​Electrical.​Digital.​Interfaces.​DigitalInput
Input DigitalSignal as connector

Information

DigitalInput is the digital input connector definition. DigitalInput is of type Logic. It can have the logic values (U, X, 0, 1, ...) which are internally coded by integer values by using the enumeration (c.f. the definition of type Logic).

Extends from Modelica.​Electrical.​Digital.​Interfaces.​DigitalSignal (Digital port (both input/output possible)).


Connector Modelica.​Electrical.​Digital.​Interfaces.​DigitalOutput
Output DigitalSignal as connector

Information

DigitalOutput is the digital output connector definition. DigitalOutput is of type Logic. It can have the logic values (U, X, 0, 1, ...) which are internally coded by integer values by using the enumeration (c.f. the definition of type Logic). The arrow shape symbolizes the signal flow direction.

Extends from Modelica.​Electrical.​Digital.​Interfaces.​DigitalSignal (Digital port (both input/output possible)).


Partial Block Modelica.​Electrical.​Digital.​Interfaces.​SISO
Single input, single output

Information

SISO is a partial model for the connection pattern with single (scalar) digital input and single (scalar) digital output. Besides the connectors it provides a rectangle for the icon which can be filled in by the component which inherits the SISO model.

Connectors

TypeNameDescription
input DigitalInputxConnector of Digital input signal
output DigitalOutputyConnector of Digital output signal

Partial Block Modelica.​Electrical.​Digital.​Interfaces.​MISO
Multiple input - single output

Information

MISO is a partial model for the connection pattern with multiple (vector) digital input and single (scalar) digital output. Besides the connectors it provides a rectangle for the icon which can be filled in by the component which inherits the MISO model.

Parameters

TypeNameDefaultDescription
Integern2Number of inputs

Connectors

TypeNameDescription
input DigitalInputx[n]Connector of Digital input signal vector
output DigitalOutputyConnector of Digital output signal

Partial Block Modelica.​Electrical.​Digital.​Interfaces.​MIMO
Multiple input - multiple output

Information

MIMO is a partial model for the connection pattern with multiple (vector) digital input and multiple (vector) digital output. Besides the connectors it provides a rectangle for the icon which can be filled in by the component which inherits the MISO model.

Parameters

TypeNameDefaultDescription
Integern1Number of inputs = Number of outputs

Connectors

TypeNameDescription
input DigitalInputx[n]Connector of Digital input signal vector
output DigitalOutputy[n]Connector of Digital output signal vector

Partial Model Modelica.​Electrical.​Digital.​Interfaces.​MemoryBase
Base model for memory elements

Parameters

TypeNameDefaultDescription
TimetHL0High->Low delay
TimetLH0Low->High delay
StrengthstrengthS.​'S_X01'Output strength
Integern_addr2Addr width
Integern_data2Data width
StringfileNameModelica.Utilities.Files.loadResource("modelica://Modelica/Resources/Data/Electrical/Digital/Memory_Matrix.txt")File where matrix for memory is stored

Connectors

TypeNameDescription
input DigitalInputRERead enable
input DigitalInputaddr[n_addr]Address
output DigitalOutputdataOut[n_data]Data output

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