ChibiOS Free Embedded RTOS

Hi,

I have further confirmation of my hypothesis regard the MCO issue.
This morning a FXO-HC73 oscillator has arrived (stability +/-50ppm).
I placed and soldered it close to the discovery microphone chip so as to inject the clock right on the pin PC9 (the worst possible place, 10cm away from the ...

Thanks Ruwe,

of course I read datasheet and reference manual thoroughly, so I had doubts it would work.
But I equally wanted to try... the board is easily 'patchable'.

Isidoro

Giovanni,

It was one of the first test I did, shortly before you've suggested that. More, I tried also with a laboratory grade external clock generator in place of the 8MHz crystal (to exclude the latter).
IMHO this issue is closed, at least with this revision (A) of the F4 chip.

Isidoro

Hi,

I'm the engineer who developed the commercial board being quoted by Giovanni. This board will be used into an industrial machine.
Well, IMHO, the F4 PLLs are inadequate to clock an ETH PHY.
I've done many tests before asserting this. I will briefly report it below.

On my board I use MCO2 on ...