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TXB0102DCUR 数据丢失

MCU数据端口电平为2.8V, 指纹模组数据端口电平为3.3V,通过TXB0102DCUR进行UART电平转换。波特率为115200,目前发现MCU与指纹模组通过TXB0102DCUR通讯时会经常出现丢失数据。将波特率降为57600,还是会出现数据丢失的现象; 将TXB0102DCUR拆掉,然后将转换芯片的A2与B2, A1与B1短接,此时UART口通讯正常,不会 丢失数据。