Hi TI Expert,
we now use SN65HVD75, below is a waveform of it. then a 100% issue is occurred.
Blue: VA-B;
Green: /RE
Yellow: RO
At this point, VAB is greater than 0, RE is L, according to the truth table content R output should be H, but actually appears low level, what's the problem?
Then, At this time, TX is sending, RX does not actually receive data, but there is a low level on RX
Please help to check it. thanks.
Below is sch.