Lpc2000

Hi Leon
The two units are internal to the equipment (simply 2 internal board 
connected by flat band) and the two board are never 
disconnected/connected.
There are diodes clamping over and under voltage to the 3V3 / 0V rails 
(like in most chips to protect inputs).

By the way there was a unit which I measured which was getting quite 
hot (not a port issue) and I found that there was a power supply 
problem and the LPC2106 was getting 7V8 instead of 3V3. It was getting 
very hot but otherwise the equipment was still worked fine.....(not to 
be advised though ;-)  )

Regards

Mark
www.mjbc.ch

> 
> Something might be happening when you are connecting the units 
together. I'd 
> be inclined to put something like 3.3 V Transguards (made by AVX) on 
all the 
> lines.
> 
> Leon