
图一中向LMP91000写入时需要设备地址和寄存器地址 为什么图二中读取值的时候只需要设备地址而不需要寄存器地址呢
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您好,在对寄存器进行读取时,需要先设置指针寄存器地址,即FIgure28,然后发送restart 命令,设备地址之后读取指针寄存器的数据。 读取的流程是这样的:
Start+7 bit slave address +Write+ ACK+ Register Address+ACK+Stop+Restart+7bit slave address +Read +ACK+ Register Data+ NACK + stop