用了TXB0101在3.6V的外部模块和3.3V的MCU之间,但是只能接收到第一个起始脉冲(正常的话,3.3端发出一个低电平脉冲,3.6端反馈数据,目前只看到3.6端只有一个脉冲)
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使用TXB0101时注意VCCA<=VCCB, 看下是否有接反,另外,信号data rate为大,不能超过100Mbps。 其次,脉冲信号是什么信号,TXBxx系列的电平转换不适合用于I2C或其他这种开漏输出的。