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BQ4050的SMB通讯的CRC计算哪几位



如题,访问一般数据比如电量百分数,电压 等,回复的最后一位是CRC数据吗?怎么算起来不对的,应该计算哪几位的CRC,例如下列实际通讯读0A地址,回复的数据是5F 00 FC,这个FC是CRC吗?计算5 F 00的CRC是50,加上地址位计算也不对15 5F 00   CRC8=32,请问是哪里问题?谢谢