What is VHDL - Interactive Quiz & Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an entity named 'MyEntity' in VHDL.

VHDL

entity [1] is
end entity;

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Aprocess

Bsignal

CMyEntity

Darchitecture

Attempts:

3 left

💡 Hint

Common Mistakes

Using keywords like 'architecture' or 'process' instead of the entity name.

The entity name defines the module's interface. Here, 'MyEntity' is the correct entity name.

2fill in blank

medium

Complete the code to start an architecture block named 'Behavior' for entity 'MyEntity'.

VHDL

architecture [1] of MyEntity is
begin
end architecture;

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ABehavior

BProcess

CEntity

DSignal

Attempts:

3 left

💡 Hint

Common Mistakes

Using VHDL keywords like 'Signal' or 'Process' as architecture names.

The architecture block defines the behavior or structure of the entity. 'Behavior' is a common name for this block.

3fill in blank

hard

Fix the error in the signal declaration by completing the code.

VHDL

signal clk : [1];

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Ainteger

Bstring

Cboolean

Dbit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'integer' or 'string' types for signals that represent digital values.

In VHDL, clock signals are usually declared as type 'bit' or 'std_logic'. Here, 'bit' is the correct simple type.

4fill in blank

hard

Fill both blanks to complete the process sensitivity list and begin statement.

VHDL

process([1])
begin
  if [2]'event and [2] = '1' then
    -- process body
  end if;
end process;

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Aclk

Brst

Attempts:

3 left

💡 Hint

Common Mistakes

Using reset signal 'rst' in the edge condition or sensitivity list instead of clock.

The process sensitivity list should include the clock signal 'clk'. Clock rising edges are detected with clk'event and clk = '1'.

5fill in blank

hard

Fill all three blanks to complete a simple signal assignment inside a process.

VHDL

process(clk)
begin
  if clk'event and clk = '1' then
    [1] <= [2] [3] 1;
  end if;
end process;

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Acounter

C+

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' instead of '+' causing decrement.

Assigning to a different signal than the one being incremented.

This code increments the signal 'counter' by 1 on each clock rising edge. The '+' operator is used for addition.