Signal assignment operator in VHDL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign the value '1' to the signal 'clk'.

VHDL

clk [1] '1';

Drag options to blanks, or click blank then click option'

A:=

B=

C<=

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':=' which is for variables, not signals.

Using '=' which is a comparison operator.

Using '=>' which is used in port maps, not assignments.

In VHDL, the signal assignment operator is <=. It assigns a value to a signal.

2fill in blank

medium

Complete the code to assign the value of 'input_signal' to 'output_signal'.

VHDL

output_signal [1] input_signal;

Drag options to blanks, or click blank then click option'

A=>

B:=

C=

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':=' which is for variables.

Using '=' which compares values.

Using '=>' which is for port mapping.

Signal assignment uses <= to assign values from one signal to another.

3fill in blank

hard

Fix the error in the signal assignment statement.

VHDL

signal_a [1] '0';

Drag options to blanks, or click blank then click option'

A<=

B=>

C=

D:=

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':=' instead of '<=' for signals.

Using '=' which is a comparison operator.

Using '=>' which is for port mapping.

The correct signal assignment operator is <=. Using ':=' causes an error because it is for variables.

4fill in blank

hard

Fill both blanks to assign '1' to 'reset_signal' and '0' to 'enable_signal'.

VHDL

reset_signal [1] '1';
enable_signal [2] '0';

Drag options to blanks, or click blank then click option'

A<=

B:=

C=

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing ':=' and '<=' operators.

Using '=' or '=>' which are incorrect here.

Both signals must use the signal assignment operator <= to assign values.

5fill in blank

hard

Fill all three blanks to assign values to signals 'a', 'b', and 'c' correctly.

VHDL

a [1] '1';
b [2] '0';
c [3] 'Z';

Drag options to blanks, or click blank then click option'

A:=

B<=

C=

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':=' for signals.

Using '=' which is a comparison.

Using '=>' which is for port maps.

All signal assignments must use the <= operator.