Lpc2000

Hi folks,

I'm setting up comms between an LPC2194 and an FTDI USB chip. It would 
appear that the CTS of the LPC can be connected to the RTS of the FTDI 
device as the FTDI device sets its RTS high when its receive buffer only 
has 32bytes of space left in it. It can thus tell the LPC to stop 
transmitting and it seems that taking the CTS line high on the LPC will, 
indeed, stop the LPC from sending data out.

So, it looks like the RTS of the FTDI chip is really a ready to receive 
signal.

However, it looks like the RTS on the LPC is not quite the same. It 
seems that it really is a request to send, rather than a ready to 
receive signal. The closest pin I can find would seem to be DTR, but I 
don't think it's the same thing at all.

Do I understand correctly? Does the LPC simply not have a pin that can 
drive an external device to tell that external device that it [the 
external device] may send data into the UART of the LPC?

Hope this makes sense, the terminology is rather confusing! ;-)

Rob - who's never done hardware flow control before! :~)