On 19/07/2022 21:28, Shenwei Wang wrote: >>>> >>>> Didn't you ignore (again) comments? >>> >>> The SoC requires two Crystal clock inputs, one is 24MHz and the other is 32KHz. >> The board design doesn't have an option to change the values. That's why we >> keep the nodes here. >> >> It's the same everywhere, nothing new here. Where is the clock? On the board. >> Not in the Soc. For convenience clock could be here, but at least the frequency >> by convention is put to the board. > > It is a little different here. Although the XTAL itself is on the board, a user has no choice here to select the clock frequency. It must use the 24MHz and 32KHz XTALs, and the two frequencies can't be changed. This is the mandatory requirement. I understand, it's the same on many other boards. Still the clock is not part of SoC design. It is always on the board. iMX is not special here, so why would you expect here an exception? Best regards, Krzysztof
