Lpc2000

> Thank you...this is exactly what I was looking for!
> 
> In my application, the CPU is deeply embedded and is
> not accessible so it cannot be reset or power cycled.
> To prevent a situation where the device gets accidentally
> stuck in the ISP software, I would like to resume normal
> execution if the ISP software is not used for say 5 minutes.
> If I set the watchdog to ~5 minutes before launching the ISP, 
> will the ISP code kick it (and thus never exit) or will it 
> allow the watchdog to timeout and reset the node 5 minutes 
> later?
> 

No Power Cycle?...Ok then.
In my opinion Dave, that would leave you with the "GO" Command (See 
ISP Commands in your UM) as the only ISP escape command. The code u 
jump to should then restore the system to your liking. I guess the 
challenge is preventing any alteration of the restoration code for 
every update. It's just an idea, but I guess it's worth trying. 

Thanks a mil Richard. I've been putting off my lpc firmware update 
research until I saw your code...a very clever & very simple piece 
of code. "ISP Invocation code" for Code Example of the Year!! :) 

Cheers,
Leighton