In the frequency counter, the length of time for the ________ to be enabled can be selected with the range select input.

Using one case construct inside another is known as ________.

In the frequency counter, the control clock is derived from the ________ by frequency dividers controlled in the control and timing block.

In the digital clock project, when it is 11:59:59, AND gate 1 detects that the tens of hours is 1 and the enable input is active. On the next clock pulse the AM/PM flip-flop will ________.

In the keypad encoder, the ring counter is implemented using ________ that responds to the clk input.