Selecting Right value of PSC and ARR values for timer

[vindhyachal]

I am using TIM3 of Stm32f407ve MCU.

CPU is running at 168Mhz and clock to TIM3 is 84Mhz

Need to select right values of PSC and ARR for accurate timing.

is this correct assumption?

Time_us = ( (psc+1)*(arr+1) ) / 84Mhz ??

[berendi]

It looks right to me.