Question

The counter starts counting only if

(a) GATE signal is low

(b) GATE signal is high

(c) CLK signal is low

(d) CLK signal is high

I got this question in an interview for internship.

My doubt stems from Programmable Interval Timer 8254 in section Special Purpose Programmable Peripheral devices and their Interfacing of Microprocessor

Answer 1

Correct answer is (b) GATE signal is high

The explanation is: If the GATE signal is enabled, then the counter starts counting.