2 micro second period with pwm output in stm32f373RCT6

[GAGGA.1]

Hi!,

I am trying to generate pulse with PWM output with 2 micro second period and 50% duty cycle on STM32F373RCT6 on custom board. I have used Timer5.

APB1 frequency is 70MHz.

Prescalar value is 69 to generate counter clock frequency of 1MHz.

ARR value is 2 to give period value of 2 micro second.

Pulse width is 1 to generate 50% duty cycle.

But PWM Output frequency is coming 1.11khz (900 micro second).

Please help me in this matter. If any other information required please let me know.

Regards,

Gaurav

[Tesla DeLorean]

Because your PLL and clock source setup is wrong or failed.

Output clocks via PA8 MCO and check them

[Tesla DeLorean]

>>If any mistake I did please let me know

52.63 KHz x 140 is approximately 8 MHz, not 70 MHz

Poor frequency suggests running from HSI not PLL

[GAGGA.1]

I will check.