Lpc2000

> I can see the utility of a proper 9 bit mode with an interrupt
after 
last 
> transmitted bit available. 


Some of Exar's latest UART's are quite nice and feature options such
as 9 bit protocol, automatic RS485 direction switching, etc.  Face it,
the 16c550 format is a relic, I would gladly swap these for 9 bit 
UART's, even if unbuffered.  For now I'm happily using Freescale 
MC9S12E's in communications applications, it has three nice 9 bit 
UART's.

Of course you can force 9 bit protocol on a 16c55x by reprogramming 
the parity bit for each character, but it's a lot of work and you 
can't use the buffer.

Here's the Exar UART matrix...

http://www.exar.com/search_uart.php

Bill T.
http://www.kupercontrols.com