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bq76pl455 自动寻址作动原理?

请问Application Note(SLVA617A)手册中1.2.3章节, 提到自动寻址功能设定, 采用广播方式发送位址从0x00~0x0F(总共16个器件), 我的问题是使用广播指令, 理论上因该所有器件都会被设成一样位址, 究竟自动寻址功能如何实现?