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smbus write时出现nack

Other Parts Discussed in Thread: BQSTUDIO

在写的过程中出现了NACK,数据序如下

write:

0x16(slave address write)+0x44(manualfactureblockaccess)+0x02(length)+0x02+0x40(dataflash 地址0x4002)

在发送外0x00 后 出现了NACK,如下图: