PEAK-System Forum

I have a PCB with a micromod FD module connected. I have tested it and am able to read analog values and transmit/receive CAN messages.

I have an external CAN transceiver hooked to pins A46 and A48. pin A19 is pulled to ground. I have nothing on the external CAN transceiver. CAN messages are still being sent on the internal CAN transceiver though.

pins A46 and A48, the external TX and RX pins, are at 3.3V. When I send data to the external CAN transceiver the state of those pins doesn't change. I think the micromod is keeping them pulled high.

Any ideas what I am doing wrong? Schematic attached.

Hello,

the hardware is prepared for an external transceiver, but the released firmware does not support this feature.
Your schematic looks OK.
Please send a Message to our support to get a premilary firmware that supports the external transceiver.
support[at]peak-system.com
with the toppic "Micromod FD external CAN transciever"

Regards,
Gunnar Bohlen

I just tested the new firmware and everything seems to be working.

Thanks.

! Thank you for the Feedback !
Topic closed