In the keypad HDL encoder, as long as all columns are high the ring counter is enabled and counting.

More Questions from Digital System Projects Using HDL

• In the digital clock project, the ENT input and RCO output can be used for synchronous counter cascading.
• In the digital clock project, when it is 11:59:59, AND gate 1 detects that the tens of hours is 1 and the edge trigger clock moves the display to 12:00:00.
• In the keypad HDL encoder, after releasing a key the ring counter resumes its counting sequence.
• In the frequency counter, a pulse shaper block is needed to ensure that the unknown signal, whose frequency is to be measured, will be compatible with the clock input for the counter block.
• The frequency counter measures frequency by enabling a counter to count the number of pulses of the incoming waveform during a precisely specified period of time called the sampling time.
• The full-step sequence always has two coils of the stepper motor energized in any state of the sequence and typically causes 30° of shaft rotation per step.
• In the digital clock project, the AHDL block codes are connected using graphic design files.
• One of the first steps in any HDL project is to define its scope by knowing the nature of all the signals that are interconnected to pieces of the project.
• In the keypad HDL encoder, the data signal is used to combine the row and column encoder data to make a 4-bit value representing the key that was pressed.
• In the VHDL code of the stepper motor, the cout outputs are bit_vector type because they are binary bit patterns.

Discussion & Comments