Lpc2000

Tom,

> >
> I just brought up a new design using LPC2106 and LPC2138 processors.
> The first thing that I did was to see if they were "alive".  I 
connected
> to them via the UART0, gave them the '?' and echo'ed 
the "Synchronized"
> back to them.
>

Many thanks, I've found the relevant bit in the manual, made up a 
cable and
tried that. Glad I'd hung a 232 converter on that port! The processor 
acts
as described.

> Once I had done that, I could assume that Clock operation was 
correct,
> Power Supplies were ok, Reset Circuit was okay, ...  IOW, the 
processors
> had the proper conditions to run with.
>

OK, now I've done that, I'll try the JTAG again. As I said before, 
I've
compared the signals (without the JTAG i/face connected) with my 
Olimex
board, and they appear identical except for TCK. Guess I need to find 
out
why that's different.

>
> I know that the BDI2000 will not attempt to connect to the board 
unless
> it first sees a VCC supply present on the JTAG connector.  Did you
> "edit" the JTAG connector pins and removed anything?
>

I've got the VCC present on pins 1 and 2, Gnd on all of the rest of 
the even
numbered pins.
The connector is wired as on the Olimex schematic. I haven't found 
anything
obvious like shorts to GND, so it may be something more subtle


Thanks again for the help, even a little progress has made me feel a 
bit
more confident.

Simon Ansley