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BQ40Z60 芯片 srec 固件求助 PF

Other Parts Discussed in Thread: BQ40Z60, BQSTUDIO

各位大神好,最近在BQstudio调试BQ40Z60 芯片 ,出现了 一个奇怪现象,按之前 方法 修改 DF 数据 ,生成srec后,再烧录进芯片,然后芯片无法正常工作,,

用BQSTUDIO ''可以读取到chemid 等信息,但发送"UNSEAL" "UNSEAL_FULL_ACCESS",芯片没有反应,然后PF 的'IFC'寄存器变为1 (instruction flash checksum ERROR) ,软件上报 packet checksum mismatch ,发送PF的复位命令0x29,芯片也没反应,两块板卡都是如此..

请帮忙确认下,,是芯片坏了吗还是srec固件有问题? 如何修复?谢谢!