Lpc2000

At 12:37 PM 5/7/04 -0400, you wrote:
>In this case, it's a quartz crystal, connected directly to the processor
>pins, coupled to ground with 18pF caps.  I should note that we started
>off with a 19.6608MHz crystal, and could not get the boot loader to do
>much more than echo back the '?' and then go into a very strange state.
>Dropping the freq got it working in 'hyperterm' mode, but not with the
>ISP loader.  We've already changed parts once, and the layout is
>bypassed very well, with the regulator at the LPC and 10uF and .1uF chip
>caps right up on the 3.3V and 1.8V supply pins.  Nevertheless, supply
>noise is still something we're thinking about.

That sounds like sufficient decoupling.  Maybe a marginal oscillator 
circuit.  Have you tried monitoring the oscillator while you are doing 
this?  Also have you checked the load capacitance against Philips 
recomendations?

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