This library contains packages for digital electrical components. Both, type system and models are based on the VHDL standard (IEEE Std 1076-1987 VHDL, IEEE Std 1076-1993 VHDL, IEEE Std 1164 Multivalue Logic System):

The logic values are coded by integer values. The following code table is necessary for both setting of input and interpreting the output values.

Code Table:

Logic value Integer code Meaning
'U' 1 Uninitialized
'X' 2 Forcing Unknown
'0' 3 Forcing 0
'1' 4 Forcing 1
'Z' 5 High Impedance
'W' 6 Weak Unknown
'L' 7 Weak 0
'H' 8 Weak 1
'-' 9 Do not care

The library will be developed in two main steps. The first step contains the basic components and the gates. In the next step the more complicated devices will be added. Currently the first step of the library is implemented and released for public use.

Copyright © 1998-2019, Modelica Association and contributors


Name Description
 UsersGuide User's Guide
 Examples Examples that demonstrate the usage of the Digital electrical components
 Interfaces Basic definitions
 Tables Truth tables for all components of package Digital
 Delay Delay blocks
 Basic Basic logic blocks without delays
 Gates Logic gates including delays
 Sources Time-dependent digital signal sources
 Converters Converters between 2-,3-,4- and 9-valued logic
 Registers Registers with N-bit input data and output data
 Tristates Transfergates, Buffers, Inverters, and WiredX

Generated at 2020-06-05T07:38:22Z by OpenModelica 1.16.0~dev-420-gc007a39