topic Re: TJA 1043 CAN link down error/ Chip state error in Other NXP Products

TJA 1043 CAN link down error/ Chip state error

Thiru09 — Tue, 17 Sep 2024 12:07:16 GMT

Hello Team,

We are using TJA 1043 CAN transceiver in our design , during the BCI tests between 1- 40 MHz we get the Link down and chip state error. To fix this i would like to understand the below factors

1. In which condition the link goes down --> interrupting CAN H/L bus or INH or any other pins could cause the link down issue?

2. Are there any lessons learnt from BCI issues with TJA 1043 already available?

Thanks

Re: TJA 1043 CAN link down error/ Chip state error

guoweisun — Wed, 18 Sep 2024 00:49:09 GMT

What do you mean about link down? do you mean the CAN communication failed?

We didn't see such failure before.

Re: TJA 1043 CAN link down error/ Chip state error

Thiru09 — Wed, 18 Sep 2024 09:13:20 GMT

Hi, Yes the Communication is down and also chip state errors received,
- If not seen before is it possible to explain--> "if which pins gets disturbed to get this scenario happen?"

Re: TJA 1043 CAN link down error/ Chip state error

guoweisun — Thu, 19 Sep 2024 01:25:42 GMT

You need to catch some waveforms during failure happened including CANH/L/STB_N/EN.