@Tim Edwards @Mitch Bailey for uart do i need to make RX as input pulldown or no pull

@samarth jain For any

USER

mode configuration, please connect the corresponding

io_oeb

signal. For

INPUT_NOPULL

,

io_oeb

may be either high or low. For

INPUT_PULLDOWN

,

io_oeb

must be low and

io_out

must be low. For

OUTPUT

,

io_oeb

must be low when you what to output. You can tie it low, if you want the output always enabled. I’m not familiar with the uart specification.

Generally, UARTs don't have pullups or pulldowns; you would presumably have your own UART transmitting continuously (output always on) and force the idle output state (which is normally a "1") rather than cut off the output and have it pull high.