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CCS/TCAN4550-Q1: Global(device) Interrupt issue.

Part Number: TCAN4550-Q1
Other Parts Discussed in Thread: TCAN4550

Tool/software: Code Composer Studio

Hello.

During my development, unluckily I've met weird problem. 

That problem is that nINT pin of TCAN4550 didn't work a little bit later.

My questions is that as time goes by with CAN FD msgs, nINT port output was changed like below, (duty is getting small.)

And than nINT pin was stopped, 

And I also checked of 0x1040 (ECR) register and mode.

After nINT pin was stopped, 0x820 register was not changed at all. 

And also NDAT register had been set as 1, even though There was not any M_CAN_INT in 0x820.

But If I cleared NDAT Reg intentionally, nINT Pin begun to work a little bit again.

I really want to get your support and help.

If you want to get any kind of data, you can ask me anytime.

Thank you

Best regards.