Question

Which does NOT influence the period of the output signal of a general-purpose timer?

a. the frequency of the source clock that drives the timer
b. value in the timer prescaler register (PSC)
c. value in the timer auto-reload register (ARR)
d. value in the timer compare and capture register (CCR)

Answer 1

The 'value in the timer compare and capture register (CCR)' does not influence the period of the output signal of a general-purpose timer.

It is used for generating interrupts or events based on comparisons, which is different from the functions that actually set the timer's period.

Therefore, the correct answer is: option d). value in the timer compare and capture register (CCR)

Step-by-step explanation:

For general-purpose timers in electronics:

• The frequency of the source clock that drives the timer directly affects the base time unit for the timer's operation.
• Value in the timer prescaler register (PSC) adjusts the clock input by dividing the frequency, impacting the timer's time base.
• Value in the timer auto-reload register (ARR) sets the value the timer will count up to or down from, which inherently affects the period of the output signal.
• The value in the timer compare and capture register (CCR) is used for comparing the timer's counter value for generating interrupts or events, but it does not influence the total period of the timer's cycle.

From the provided options, the letter (d) 'value in the timer compare and capture register (CCR)' is correct because this value does not determine the period of the timer's output signal but rather is involved in triggering specific actions based on comparison results during the timer's operation.