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6 years ago.
Do I need a CAN transiever for this?
I've read the spec sheet its not clear if I do or not, how can I tell from the spec sheet?
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1 Answer
6 years ago.
If you need the signal at actual CAN level bus voltage, then Yes you need a transceiver. You can test the CAN driver in loopback mode without the transceiver, but to connect to the bus you will need it.
Thanks Graham, some mcu's apparently don't need one, how can i tell from the spec sheet its not obvious to me.
posted by 27 Feb 2018Virtually all of them do require a transceiver chip. If a part doesn't require one expect it to make a big deal about it.
It's a bit like UARTs, all of them have a UART but I can't think of any off hand that output RS232 levels, you always need to use a driver. Line drivers are a very different silicon process to logic, mixing the two adds cost and complexity.
posted by 28 Feb 2018