Lpc2000

At 02:30 PM 3/8/04 +1300, you wrote:
>I am currently waitng for my development tools but have larely finished
>my circuit diagram, and need to deal with this pin.
>
>As a matter of principle I like to have firware upgrade capablity in my
>products via a serial port. (Its difficult to otherwise access hardware
>embedded in 1/2 an inch of epoxy!)
>
>I appreciate that this bit (and a reset) give access to the boot loader.
>Is is also possible to jump into the boot loader from a running program.
>If so what is the entry address and what conditons must I set up before
>I do. I expect to reset the program afterwards.

If you are not going to reprogram the whole chip you could use the IAP 
facility.  If you are going to do the whole chip (or the boot area) I would 
want to have access to the ISP pin in any case if only as a fall back for 
the cases when the programming gets interrupted and leaves you with no 
valid program.  I've seen that behaviour on several boards even without 
potting.  Add potting and Murphy is going to get might tempted ;)

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