7i92M + 7i76 add PWM+PktUART

​​​​​Hello PCW,I am using a Mesa 7i96M with a 7i76, and I would like to ask a question regarding firmware configuration before requesting any custom bitfile.Question:
Is it possible for PktUART to be used instead of SSerial in a 7i96M firmware configuration?
I would like to understand whether PktUART can be implemented in place of SSerial, or if SSerial is architecturally fixed and not interchangeable.If this is feasible, I would like to request a custom bitfile with the following changes:

• Replace SSerial with PktUART
• Repurpose STEP5 (unused in my system) as a PWM output
• Keep all other functions the same as the standard 7i96M + 7i76 firmware

If this is not feasible, I would appreciate any guidance on recommended alternatives.Thank you very much for your time and for the excellent Mesa hardware.
 

Unfortunately the serial interface on the 7I76 is RS-422 only so not suitable for Modbus
which normally requires a 2 wire (RS-485) connection.

You could add a single chip RS-485 adapter to the second 7I92 connector though.

Perhaps using a SP491 with the proper RS-485 bias resistors