Lpc2000

At 02:36 PM 9/15/04 -0700, you wrote:
>Thanks Robert,
>
> > Have you verified that the clock is running?
>
>Yes I can see the clock on my oscilloscope scope and the frequency is
>correct to the accuracy I can measure.
>
> >
> > Next question would be are connected to an input pin on the MAX?
> >
>
>I can see the RS232 signal at the board input with the oscilloscope, and I
>can also see a logic level version of the signal coming out of the MAX, and
>arriving the RXD0 pin of the LP2106.  When I check the TXD0 pin I see no
>signal.

OK, I'd do two things.  Not necessarily in this order.

- lift the Max pin that is connected to the TXD0 pin and then check the TXD 
pin for output.  That will verify it's not just being pulled down by the MAX.

- Use a simple terminal program and go through the initial startup sequence 
by hand.  It's a lot easier to repeat that way and the timing is totally 
under your control.

Hmm, a thought springs to mind.  An earlier poster ran into a problem with 
ISP and it turned out to be insufficient decoupling (on his driver chip if 
I remember correctly).

Also check the pin that takes the micro into JTAG mode, I don't remember if 
that is a potential problem and I don't have the reference to hand but it's 
worth verifying.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III