AnsweredAssumed Answered

External LSE clock tr/tf is lower than tr/tf of external HSE clock

Question asked by TimeIt on May 21, 2018
Latest reply on May 29, 2018 by TimeIt

We would like to know if there's a typo for tr/tf (10 ns max) of OSC32_IN in the following STM32L151x data sheet table:

 

 

The reason we believe the above tr/tf value is a typo because the tr/tf for a high speed clock is twice as long(20 ns max) :

 

We are trying to feed an external 1.8V swing 32.768 kHz clock in to OSC32_IN from a micro power oscillator which can only support rise/fall times of 30 ns.

Will this work?

Thanks,

JP

Outcomes