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对于f290039芯片中,我公司画了10块板子,其中有2块全新板子在市电情况下烧入不进去程序,但是在直流稳压源供电情况下可以正常烧入,不知道为啥?你们有相关问题借鉴吗?(我个人有点怀疑f280039最小电路有问题,您有相关电路吗?我想对比一下)