Differences in new PicoCOMA5 board rev. 1.23

Hello,

we recently received new PicoCOMA5 modules with a new board revision.

What are the differences between this new and previous revision 1.20?

It looks like the new one uses a different crystal because the system frequency has slightly changed.

Could you provide us with current documentation for the new board/hardware?

Thank you,

Kamil

I'm developing fw on my old PicoCOMA5 and that is why I haven't noticed this "new" version until now.

Version number is taken from NBoot:

F&S Nand Loader VN15 built Jul 26 2019 09:29:43

PicoCOMA5 Rev. 1.23

Different version number is not the problem in itself. The reason why I'm checking versions is other: in this "new" board system frequency is slightly lower - 82534736 Hz while it used to be 83368421 Hz.

This is not a big difference (about 1%) but it affects also our UART and SPI communication anyway.

In addition, the new board also shows a kind of "jitter" when transmitting on UART/SPI - as if the new board had an unstable system frequency.

Jitter is small, but noticeable on the oscilloscope.

Is this also a consequence of any changes in NBoot? And is it possible to go back to some earlier version of NBoot?

Thank you,

Kamil