lpcware

Questions about UART in RS-485 mode

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by ezharkov on Wed Jul 31 07:59:30 MST 2013
I wanted to make sure that I understand the LPC (1788) UART correctly, just as a sanity check. I'm so used to a UART on another platform, AVR, so that every time I see something different, I start questioning my understanding of the datasheet.

So, here it goes. Couple of questions.

1) I see that there is TXEN. But there is no RXEN. I.e., there is not way to have RX disabled, right? Not that I need to have RX disabled, just curious.

2) When I transmit something to RS-485, I do not receive anything back. I assume this is because I use Auto Direction Control and the receiver gets disabled automatically when the transmitter is active, right? Is there anything in a datasheet that clearly documents this behavior?

Thanks,
Eugene

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