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DS90UB953TRHBRQ1上电访问不了

Other Parts Discussed in Thread: DS90UB954-Q1

你好,我司使用用DS90UB953TRHBRQ1和DS90UB954-Q1 开发项目,采用stp传输,现在发现上电概率性访问953出错,i2C读不到953,尝试拉低pdb引脚再拉高就可以访问了。测试953的上电时序如下图,规格书中的T2是指如果使用复位引脚复位芯片的话,必须在复位引脚拉高T2之后再拉低复位吗?还是上电初始化的时候就要执行一次硬件复位操作?