Lpc2000

Hello,

I've got a design where 2 LPC2129 will be used. They will 
communicate with eachother. My first guess is that the clocksignals 
for both controllers should be the same to prevent phase-shift or 
small frequency differences when using two crystals.

I believe that it is possible to clock the microcontroller by an 
external clock, so I would like to clock both controllers by one 
external source.

Has anyone experience with this, or done this before? Are there 
other issues that require attention when using two controllers in a 
system? 

I've got one controller that will measure continuously, send the 
result to the other controller (sender is master), the other 
controller then has to manipulate this data a bit and send it to 
either COM or CAN, and control an amplifier or something.

Regards,
Laurens