Lpc2000

At 01:31 AM 6/19/05 -0300, Boris Estudiez wrote:
> From LPC21xx Philips datasheet:
>
>"P1.20: LOW in this pin while /RESET is LOW, enables pins P1.25:16
>to operate as Trace port after reset."
>"P1.26: LOW in this pin while /RESET is LOW, enables pins P1.31:26
>to operate as Debug port after reset."
>
>I don't want to use Trace and Debug port.
>Should I connect P1.20 and P1.26 pins to +3.3V (via pull-up resistors) ?.

Yes.

>It's necessary ?

I think so.  At the very least it's good defensive practice and gives you 
pads to connect to if you want to probe  or add to the area.

Speaking of datasheets.  Is anyone else having trouble getting them from 
Philips site?  I keep getting "the page you requested is not 
available".  This is the link I end up following

http://www.semiconductors.philips.com/acrobat_download/datasheets/LPC2104_2105_2106-05.pdf

Of course Philips site is probably one of the slowest on the web, I 
actually timed the 2104 product page and it took 1/2 a minute to render, 
and that discourages a lot of exploration.

Hmm, I just checked with IE.  It seems to be specific to firefox.  Render 
speed is about the same for both, turning javascript off (I usually do but 
for some reason it was on) helps a lot.  I'll try a few other systems to 
see if I can nail down what is happening with the pdf download.

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
http://www.aeolusdevelopment.com/