Lpc2000

Dave,

> Did I miss something?  I don't see any "*" to indicate the option is
> only available on some parts of the family?
>
> FYI, My real target processor is the LPC2141, but I am doing this
> development on the LPC2131.  According to the user manuals SPI
> description, they look identical. 
>
Both should work in 9..16 bits mode.
I tried writing the register on my 2138 board and that went OK.

The LPC2104/5/6 only support 8 bits (that's why the register was defined 
as 8 bits in your lpc21xx.h file).
If you still suspect your program try my io-test program 
(http://www.myvoice.nl/electronics/files/io-test.zip) it writes and 
reads memory in 32-bits read and write mode.

Rob