Lpc2000

At 10:03 AM 6/17/04 +0200, you wrote:
>No this is wrong. They will use also a crystal.

Sorry, It's true.  It surprised me enough on first seeing it I verified it 
with ST.  There are up to three clock sources on the ST, the Real time 
clock which is a 32kHz crystal, the main reference clock (which is a single 
pin input on the smaller devices) and on USB devices a precision 48MHz 
reference.

To quote from the implementation guide "The STR71x clock control unit must 
be driven by an external oscillator, connected to the CLK pin, at a 
frequency of up to 16 MHz. It generates the clocks for the CPU and for the 
on-chip peripherals."

They also have an unusual power supply scheme (Three inputs two of them 
optionally supplied by the micro).

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