Lpc2000

--- In lpc2000@yahoogroups.com, "rggmns" <rggmns@...> wrote:
>
> Hello,
> I have spend most of this day in getting my LPC2103 running.
> I even posted two messages and made a fool of myself.
> Want to know why?
> Well de users manual written by these Dutch guys does not mention that
> port 0.14 is still in use as ISP enable pin (not in de pin functional
> description, and yes they do so in the small print on page 229!!).
> 
> All works fine now.
> 
> PLEASE Philips guys, get the pin descriptions complete and accurate!!
> 
> Thank You all
> 
> Roggemans M.
>

I'm looking at Table 48 Pin Description For LPC2131/2132/2138 (page
77) and the entry for P0.14 where there is an 'Important' note
describing the use of P0.14.  This is in the User Manual dated
November 22, 2004.  Am I looking at the wrong thing?  So far, the
boards I am using are designed by others.  I haven't actually done one
of my own.

Anyway, this pin is always evaluated at reset and used to force the
system to invoke the bootloader rather than executing a user program
(if present).

From a design point of view, circuits connected to P0.14 must be able
to withstand forcing this pin to ground to enable loading new code. 
Not that field upgrades are ever required.  But, just in case...

Richard