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STM3240G-EVAL MCO

jo
Associate II
Posted on March 17, 2015 at 10:01

Is it possible to clock the MCO1 at 50MHz? I have HSE of 25MHz? I did not find instructs.

#stm3240g-eval
3 REPLIES 3
Posted on March 17, 2015 at 13:24

You'd have to run the processor at a multiple of 50 MHz, ie 150 MHz, and divide down from there. You'd want to check if the PLL generates too much jitter/phase-noise for ethernet applications.

The processor will take an external clock source up to 50 MHz via HSE input.

Also there is the I2SPLL via MCO2

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jo
Associate II
Posted on March 27, 2015 at 18:00

@Clive: tnx, it works but it is not the preffered way.

@Jan: 🙂 It sounds like much frustration.