Quote:
Okay, no big difference in spec between the E and non-E version there.

Try switching to R51 from R52. EDIT: Yes, we absolutely need this, I think.

-ml


Explanation: The bit transmission scheme used by the kernel and the PIC appears
to use a series of 15us and 2us pulses to send information over the control line.

A 2us pulse would correspond to about a 500kb/s transmission rate.

The MAX3237(E) requires MBAUD==Vcc for rates above 250kb/s.
Populating R51 instead of R52 gives us that setting.

Cheers