All Questions
7
questions
3
votes
2
answers
165
views
Difference between Single-supply and Dual-supply CAN Transceiver
I was about to choose the MCP2558FD CAN Transceiver for a personal project. I found on the datasheet the following diagram:
If my understanding is good, I can use it as a dual-supply Transceiver.
But ...
- 154
3
votes
3
answers
1k
views
How can I design a CAN BUS hardware interface for STM32? (TTL and CMOS issue)
I am designing a PCB based on STM32F446 and I want to include CAN BUS communication. I know I need a transceiver (from CAN_H and CAN_L to TX and RX) and a CAN Controller. I have thought about MCP2551 (...
0
votes
2
answers
2k
views
CAN bus expander circuit
I am trying to design a CAN bus expander. In this case I could implement star topology of multiple buses in parallel. It would avoid having problems with reflections and delay.
For this purpose I ...
5
votes
2
answers
4k
views
Is there hardware compatibility between CAN 2.0 High Speed, Low Speed and CAN-FD?
I am studying CAN interface hardware for the design of an automotive scanner. So far, I have identified the following types of CAN:
CAN 2.0 High-Speed: bit rate up to 1Mbps
CAN 2.0 Low Speed: bit ...
- 917
0
votes
2
answers
1k
views
Can you use a CAN FD transceiver for low speed (fault tolerant) CAN?
Fault tolerant CAN (ISO11898-3) is terminated differently than high speed CAN (ISO11898-2). Therefore the signal levels for dominant and especially recessive bits differ.
Newer CAN FD compatible ...
- 439
1
vote
1
answer
166
views
Should I take precautions when using different CAN transceivers on the same bus?
What are the precautions I should be aware of when using different transceivers on a CAN bus?
What I can think of:
They neeed to operate at the same voltage (on ...
- 481
1
vote
1
answer
2k
views
Controller area network voltages
The CAN bus has CAN-High and CAN-Low lines. Normally, in the recessive state the voltages are each 2.5 V and in the dominant state the CAN-High line goes to 3.5 V and the CAN-Low line goes ...
- 437