10-bit Down-counter Timer

The timer uses a 10-bit unsigned counter.

Behavior

• reset=1 immediately forces count to 0.
• When load=1 on a rising edge, data is loaded into count.
• Otherwise, count decrements on each rising edge.
• tc is 1 whenever count is 0.
• Decrementing from 0 produces 1023 by unsigned wraparound.

Reset is asynchronous, while loading is synchronous.