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MSP430G2533工作5分钟 I2C引脚无数据输出,泪奔!

Other Parts Discussed in Thread: BQ78350, BQ76930, MSP430G2553

TI达人:

       我使用MSP430G2553与BQ76930、BQ78350同时通讯,与BQ76930的硬件增加一个ISO1541D隔离,开机工作一段时间都是完好的,数据读写都正常,波形也无异常。但是工作5分钟之后,I2C总线上无波形再输出了,SCL为高电平3.3V,SDA为低电平,电压在0.6V左右。这时硬件复位MSP430G2553都无效!只有断掉系统电源才能恢复!这种问题是如何引起的?

    期望各位的解答,谢谢!