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手头有两块28377s的板子,BOOT开关sci mode都是sciboot0 mode,但有一块板子是创龙封装的,没有外扩出gpio84、85。能不能修改rom中关于用于sci升级软件的pin。(如:有个外设使用gpio22、23的sci转uart,查询手册可以使用sciboot1 mode升级程序,但封装的BOOT开关只能转为sciboot0 mode)。