Modelica.Electrical.Digital.Examples

Examples that demonstrate the usage of the Digital electrical components

Information

This package contains examples that demonstrate the usage of the components of the Electrical.Digital library.

The examples are simple to understand. They will show a typical behavior of the components, and they will give hints to users.

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name	Description
Multiplexer	4 to 1 Bit Multiplexer Example
FlipFlop	Pulse Triggered Master Slave Flip-Flop
HalfAdder	Adding circuit for binary numbers without input carry bit
FullAdder	Full 1 Bit Adder Example
Adder4	4 Bit Adder Example
Counter3	3 Bit Counter Example
Counter	Generic N Bit Counter Example
VectorDelay	Vector delay
DFFREG	Pulse triggered D-Register-Bank, high active reset
DFFREGL	Pulse triggered D-Register-Bank, low active reset
DFFREGSRH	Pulse triggered D-Register-Bank, high active set and reset
DFFREGSRL	Pulse triggered D-Register-Bank, low active set and reset
DLATREG	Level sensitive D-Register-Bank, high active reset
DLATREGL	Level sensitive D-Register-Bank, low active reset
DLATREGSRH	Level sensitive D-Register-Bank, high active set and reset
DLATREGSRL	Level sensitive D-Register-Bank, low active set and reset
NXFER	Functionality test of NXFERGATE
NRXFER	Functionality test of NRXFERGATE
BUF3S	Functionality test of BUF3S
INV3S	Functionality test of INV3S
WiredX	Functionality test of WiredX
MUX2x1	Simple Multiplexer test
RAM	Simple RAM test example
Utilities	Utility components used by package Examples

Modelica.Electrical.Digital.Examples.Multiplexer

4 to 1 Bit Multiplexer Example

Information

The multiplexer converts a parallel 4 bit signal in a sequential 1 bit stream. The multiplexer component is composed by basic gates. It can be found in the Utilities subpackage. The example is designed to test and demonstrate the basic gate components.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.FlipFlop

Pulse Triggered Master Slave Flip-Flop

Information

A pulse-triggered master-slave flip-flop is demonstrated. The flipflop component is composed by basic gates. It can be found in the Utilities subpackage. The example is designed to test and demonstrate the basic gate components.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.HalfAdder

Adding circuit for binary numbers without input carry bit

Information

This example demonstrates an adding circuit for binary numbers, which internally realizes the interconnection to And and to Xor in the final sum.

a     b     c      s     t

1     0     1      0     1
0     1     1      0     2
1     1     0      1     3
0     0     0      0     4

t is the pick-up instant of the next bit(s) in the simulation. The simulation stop time should be 5 seconds.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.FullAdder

Full 1 Bit Adder Example

Information

It is an adding circuit for binary numbers with input carry bit, which consists of two HalfAdders.

a.y, b.y and c.y are the inputs of the FullAdder.
cout = Or1.y and h.s are the outputs of the FullAdder.

t is the pick-up instant of the next bit(s) in the simulation.

a.y      b.y     c.y      cout       h.s        t

1        0        0        0          1        1
0        1        0        0          1        2
0        0        1        0          1        3
1        1        0        1          0        4
0        1        1        1          0        5
1        0        1        1          0        6
1        1        1        1          1        7
0        0        0        0          0        8

The simulation stop time should be 10 seconds.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.Adder4

4 Bit Adder Example

Information

Four FullAdders are combined to built a four bit adder unit.

at t = 0                            at t = 1
 a       0 0 0 0                       a      1 1 1 0
 b    +  0 0 0 0                       b   +  1 0 1 1
 s     0 0 0 0 0                      s     1 0 0 1 0
at t = 2                             at t = 3
 a       0 1 1 0                       a      1 1 1 0
 b    +  0 0 1 1                       b   +  1 0 1 0
 s     1 0 1 0 0                      s     0 0 0 1 1

at t = 4
 a      1 1 0 0
 b   +  1 1 1 0
 s    0 0 1 0 1

To show the influence of delay a large delay time of 0.1s is chosen. Furthermore, all signals are initialized with U, the uninitialized value. Please remember, that the nine logic values are coded by the numbers 1,...,9. The summands a and b can be found at the output signals of the taba and tabb sources. The result can be seen in the output signals of the FullAdders according to:

a                    a4.y      a3.y      a2.y      a1.y
b                    b4.y      b3.y      b2.y      b1.y
sum   Adder4.c_out  Adder4.s  Adder3.s  Adder2.s  Adder1.s

The simulation stop time has to be 5s.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.Counter3

3 Bit Counter Example

Information

The three bit counter example is built up by components of the Utilities package which uses components of the Gates library.

The counter counts the high-low slopes of the clock signal, if the enable signal is set to be true. Otherwise if it is set to zero the counter is not counting.

Plot Counter.count (clock signal), and Counter.enable, and the output bit signals Counter.q0, Counter.q1, and Counter.q2.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.Counter

Generic N Bit Counter Example

Information

The counter example is built up by components of the Utilities package which uses components of the Gates library. It demonstrates the generic counter model. The parameter n is the number of counting bits. In this example it is set to 4.

The counter counts the high-low slopes of the clock signal, if the enable signal is set to be true. Otherwise if it is set to zero the counter is not counting.

Plot Counter.count (clock signal), and Counter.enable, and the output bit signals Counter.q[0], Counter.q[1], Counter.q[2], and Counter.q[3]

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.VectorDelay

Vector delay

Information

This example is a simple test of the vector valued sensitive delay component. The delay times are chosen different from each other. To examine the results plot both the input vector x and the output vector y.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DFFREG

Pulse triggered D-Register-Bank, high active reset

Information

This example is a simple test of the Registers.DFFREG component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DFFREG component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DFFREGL

Pulse triggered D-Register-Bank, low active reset

Information

This example is a simple test of the Registers.DFFREGL component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DFFREGL component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DFFREGSRH

Pulse triggered D-Register-Bank, high active set and reset

Information

This example is a simple test of the Registers.DFFREGSRH component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DFFREGSRH component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DFFREGSRL

Pulse triggered D-Register-Bank, low active set and reset

Information

This example is a simple test of the Registers.DFFREGSRL component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DFFREGSRL component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DLATREG

Level sensitive D-Register-Bank, high active reset

Information

This example is a simple test of the Registers.DLATREG component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DLATREG component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DLATREGL

Level sensitive D-Register-Bank, low active reset

Information

This example is a simple test of the Registers.DLATREGL component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DLATREGL component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DLATREGSRH

Level sensitive D-Register-Bank, high active set and reset

Information

This example is a simple test of the Registers.DLATREGSRH component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DLATREGSRH component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.DLATREGSRL

Level sensitive D-Register-Bank, low active set and reset

Information

This example is a simple test of the Registers.DLATREGSRL component. The data width is set to two. After simulation plot both the dataIn and the dataOut vectors. To verify the results compare the truth table which is documented in the DLATREGSRL component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.NXFER

Functionality test of NXFERGATE

Information

This example is a simple test of the Tristates.NXFERGATE component.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.NRXFER

Functionality test of NRXFERGATE

Information

This example is a simple test of the Tristates.NRXFER component. After simulation until 12 s plot x, enable, and y of the nRXFERGATE component. To verify the result compare to the truth table NRXferTable.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.BUF3S

Functionality test of BUF3S

Information

This example is a simple test of the Tristates.BUF3S component. After simulation until 12 s plot x, enable, and y of the bUF3S component. To verify the result compare to the truth table Buf3sTable.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.INV3S

Functionality test of INV3S

Information

This example is a simple test of the Tristates.INV3S component. After simulation until 12 s plot x, enable, and y of the iNV3S component. To verify the result compare to the truth table T.UX01Table.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.WiredX

Functionality test of WiredX

Information

This example is a simple test of the Tristates.WiredX component. The input width is set to two. After simulation until 12 s plot x[1], x[2], and y of the WiredX component. To verify the result compare to the truth table Tables.ResolutionTable.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.MUX2x1

Simple Multiplexer test

Information

This example is a simple test of a single multiplexer component with 2 inputs prescribed by sources, one select input, and one output. After simulation until 15 s plot Mux2x1.in0, Mux2x1.in1, Mux2x1.sel, and Mux2x1.out. Compare the output signal with the input signals. If the select signal changes, the output switches to the other input.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica.Electrical.Digital.Examples.RAM

Simple RAM test example

Information

This example is a simple and uncomplete test of a single DLATRAM component . After simulation until 400 s plot dLATRAM.addr[1], dLATRAM.addr[2], and dLATRAM.dataOUT[1], dLATRAM.dataOut[2]. The address inputs are prescribed with all possible combinations of logic values. It can be checked in which cases of address values the output is 'X' or '0'.

Extends from Modelica.Icons.Example (Icon for runnable examples).