Dear Champs,
I am asking this for our customers.
One of our customers wants to use F28035 eCAN to communicate to another host MCU via CAN on the same board without any transceiver.
We notice there was a discussion about this, but there is no more detail about the physical connection.
We also note that there are at least two articles mentioning this kind of connection so that no external transceiver is needed.
Figure 2 of
http://www.mikrocontroller.net/attachment/28831/siemens_AP2921.pdf
Chapter 2.3 (page 11) in this app note.
https://www.renesas.com/en-eu/doc/products/mpumcu/apn/rl78/001/r01an2535ed0200_can.pdf
It appears the connection by two external diodes and one pull-up resistor on both Tx pins can work.
Therefore, we'd like to confirm again with you.
Do you think this connection also works for eCAN of F28035/F28069?
Or is there any hardware difference of the eCAN module so that we cannot use it like that way?
Wayne