Other Parts Discussed in Thread: ISO7731, ISOW1044
Tool/software:
Hi
We are looking at implementing CAN FD using a microprocessor that does not support it, hence we found some design reference notes suggesting the use of an external Controller like TCAN4550.
However we need the CAN FD to be isolated and TCAN4550 has an internal transceiver. It appears that there is a mode in TCAN4550 called 'Test Mode', section 8.4.4, in which GPIO1 and GPIO2 can be mapped with CAN Controller outputs: RXD_INT_CAN and TXD_INT_CAN respectively. Then, I was thinking these can be connected to an external Isolator like ISO7731 and a TCAN1402 powered by an isolated converter.
What it is not clear to me is what a "Test mode" really means. Could you please expand on the implications on running normal communication operations while the TCAN4550 is configured in such way.
Also Could you please confirm suggested design approach to Isolate CAN FD?
Many thanks in advance
Kind Regards