Lpc2000

> I think the additional micro as watchdog is not a bad idea.  A little 8 pin 
> micro can act as quit a flexible watchdog.  1 pin for reset, 1 as the 
> watchdog input, a couple to check for various startup or runtime 
> conditions.  If it has a good reliable power monitor built in even 
> better.  It' may even be cost competitive with a windowed watchdog.
> 
> Jack Ganselle has an article where he waxes rhapsodic about the possibilities.
> 
> Robert

Robert,
We thought of that today. There are some SOT-23 PICs with 4 I/O that
would be cheap and perfect. Downside is they have to be programmed
somehow. So far my design is entirely flashable from outside.

You could even speak I2C to it and schedule the next reset pulse to
occur if there is no further comm.  This could even include as special
value for the duration that meant disable the watchdog function.

It's dissapointing however to have to use a PIC beacuse it has a 
reliable watchdog and BOR to pull reset on the ARM because it doesn't.

Landrum Haddix
lhaddix@...
http://web.qx.net/lhaddix