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The MPC5741 chip's Flexcan module's MCR register's IRMQ was not written successfully

Question asked by 锟 曾 on Dec 3, 2019
Latest reply on Dec 3, 2019 by 锟 曾

According to the UM,This bit can be written only in Freeze mode。But I'm already in freeze mode,It's no use writing 1,The register value was found to be 0 when debugging with lauterbach,Before that,FRZ bir is 1, FRZACK bit is 1, and HALT bit is 0。Even if I don't set HALT to 0,When I've set up the MAXMB bit, HALT automatically goes to 0。

     Could you tell me the reason why I failed to write IRMQ?