Modelica.Electrical.Digital.Interfaces

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 Content

Name	Description
Logic	Logic values and their coding according to IEEE 1164 STD_ULOGIC type
UX01	4-valued subtype of IEEE 1164 STD_ULOGIC type
Strength	Output strengthes of registers
DigitalSignal	Digital port (both input/output possible)
DigitalInput	Input DigitalSignal as connector
DigitalOutput	Output DigitalSignal as connector
SISO	Single input, single output
MISO	Multiple input - single output
MIMO	Multiple input - multiple output

Types and constants

  type Logic = enumeration(
    '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",
    '-' "-  Don't care") 
  "Logic values and their coding according to IEEE 1164 STD_ULOGIC type";

  type UX01 = enumeration(
    'U' "U  Uninitialized",
    'X' "X  Forcing Unknown",
    '0' "0  Forcing 0",
    '1' "1  Forcing 1") "4-valued subtype of IEEE 1164 STD_ULOGIC type";

  type Strength = enumeration(
    'S_X01',
    'S_X0H',
    'S_XL1',
    'S_X0Z',
    'S_XZ1',
    'S_WLH',
    'S_WLZ',
    'S_WZH',
    'S_W0H',
    'S_WL1') "Output strengthes of registers";

Modelica.Electrical.Digital.Interfaces.DigitalSignal

Information

DigitalSignal is the basic digital connector defintion. 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 Logic (Logic values and their coding according to IEEE 1164 STD_ULOGIC type).

Modelica definition

connector DigitalSignal = Logic "Digital port (both input/output possible)";

Modelica.Electrical.Digital.Interfaces.DigitalInput

Information

DigitalInput is the digital input connector defintion. 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 DigitalSignal (Digital port (both input/output possible)).

Modelica definition

connector DigitalInput = input DigitalSignal "Input DigitalSignal as connector";

Modelica.Electrical.Digital.Interfaces.DigitalOutput

Information

DigitalOutput is the digital output connector defintion. 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 DigitalSignal (Digital port (both input/output possible)).

Modelica definition

connector DigitalOutput = output DigitalSignal 
  "Output DigitalSignal as connector";

Modelica.Electrical.Digital.Interfaces.SISO

Information

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

Connectors

Type	Name	Description
input DigitalInput	x	Connector of Digital input signal
output DigitalOutput	y	Connector of Digital output signal

Modelica definition

partial block SISO "Single input, single output"
  import D = Modelica.Electrical.Digital;
  D.Interfaces.DigitalInput x "Connector of Digital input signal";
  D.Interfaces.DigitalOutput y "Connector of Digital output signal";
end SISO;

Modelica.Electrical.Digital.Interfaces.MISO

Information

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

Parameters

Type	Name	Default	Description
Integer	n	2	Number of inputs

Connectors

Type	Name	Description
input DigitalInput	x[n]	Connector of Digital input signal vector
output DigitalOutput	y	Connector of Digital output signal

Modelica definition

partial block MISO "Multiple input - single output"
  import D = Modelica.Electrical.Digital;

  parameter Integer n(final min=2) = 2 "Number of inputs";
  D.Interfaces.DigitalInput x[n] "Connector of Digital input signal vector";
  D.Interfaces.DigitalOutput y "Connector of Digital output signal";
end MISO;

Modelica.Electrical.Digital.Interfaces.MIMO

Information

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

Parameters

Type	Name	Default	Description
Integer	n	1	Number of inputs = Number of outputs

Connectors

Type	Name	Description
input DigitalInput	x[n]	Connector of Digital input signal vector
output DigitalOutput	y[n]	Connector of Digital output signal vector

Modelica definition

partial block MIMO "Multiple input - multiple output"
  import D = Modelica.Electrical.Digital;

  parameter Integer n(final min=1) = 1 "Number of inputs = Number of outputs";
  D.Interfaces.DigitalInput x[n] "Connector of Digital input signal vector";
  D.Interfaces.DigitalOutput y[n] "Connector of Digital output signal vector";
end MIMO;