Concurrent signal assignment in VHDL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign the value '1' to signal 'a' concurrently.

VHDL

a [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 variable assignment inside processes.

Using '=' which is for comparisons, not assignments.

In VHDL, concurrent signal assignment uses the '<=' operator to assign values to signals.

2fill in blank

medium

Complete the concurrent assignment to assign the sum of 'x' and 'y' to signal 'z'.

VHDL

z [1] x + y;

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 inside processes.

Using '=' which is for comparisons.

Concurrent signal assignment uses '<=' to assign the result of expressions to signals.

3fill in blank

hard

Fix the error in the concurrent assignment to signal 'out1' with the value of 'in1'.

VHDL

out1 [1] in1;

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 inside processes.

Using '=' which is for comparisons.

Concurrent signal assignment requires '<=' operator, not ':=' or '='.

4fill in blank

hard

Fill both blanks to assign the logical AND of 'a' and 'b' to signal 'c' concurrently.

VHDL

c [1] a [2] b;

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

A<=

Band

C+

D:=

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':=' instead of '<=' for signal assignment.

Using '+' instead of 'and' for logical operation.

Use '<=' for concurrent signal assignment and 'and' for logical AND operation.

5fill in blank

hard

Fill both blanks to assign the bitwise OR of 'x' and 'y' to signal 'result' concurrently.

VHDL

result [1] x [2] y  ;

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

A<=

Bor

D:=

Attempts:

3 left

💡 Hint

Common Mistakes

Using ':=' instead of '<=' for signal assignment.

Adding an extra operator after 'y'.

Use '<=' for concurrent assignment, 'or' for bitwise OR, and no extra operator after 'y'.