Lpc2000

Just for clarification on the UART Block Diagram (see UM)...
1. Do U0TSR & U0RSR actually representthe Tx & Rx FIFO buffers? I 
only see U0TSR & U0RSR illustrated here and I can't find any other 
documentation for it.

Now concerning U0THR & U0RBR (data registers)...
2. Why do they both share the same memory address? I'd really like 
to know the purpose of this.

3. What will happen if the lpc receives a character while I'm 
writing to the transmit register?

I ask this because currently, I'm having trouble running the serial 
port both ways (with interrupts) while sending replies and receiving 
command packets from the PC. Sometimes the protocol I'm using works. 
However, while debugging I always notice the lpc losing receiver 
bytes whenever communication goes wrong. I only observe this 
happening if the lpc's replying to a command packet and another 
command packet's coming in the same time.

best regards,
Leighton