STM32F446ZET6 MCO2 output duty 35%?

[zhangyingying]

dear：

PH0-OSC_IN：12.288MHZ，duty=50%。

but MCO2(PC9) output clk is 35%。

can you help me？

[TDK]

Show the traces. Digital or analog? Perhaps logic level isn't symmetric around the midline so it favors. Ensure output pin frequency is set to max.

[Tesla DeLorean]

Nobody has any idea what you've built or any of the clock and PLL settings.