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OMAP-L138 I2C 通信识别slave端ACK信号问题

Other Parts Discussed in Thread: OMAP-L138

    用OMAP-L138自带的IIC与外部EEPROM AT24C02 进行通信,仔细看了时序图,当MASTER端写完一个字节后,slave端需要返还一个ACK信号,但是看遍了手册里,也没有找到如何判断slave 端是否返还了ACK信号?请问该如何判断。