Lpc2000

----- Original Message ----- 
From: "Robert Adsett" <subscriptions@...>
To: <lpc2000@yahoogroups.com>
Sent: Sunday, June 19, 2005 6:01 PM
Subject: Re: [lpc2000] MAX232 and P1.20/P1.26 pins.


> 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.

I just accessed the LPC2106 page with IE and it took under 2s! I have a 4 Mb 
broadband connection (soon to be updated to 8 Mb) which helps.

Leon 


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