Lpc2000

Does anyone have problem to use P0.11 as GPIO? I built two 
prototypes, and both have the same problem on the port, P0.11 . I 
checked my circuit there is no short, nor broken trace from the CPU. 
I can toggle any port, except P0.11. Maybe my LPC2138 samples are 
bad? Any info is appreciated. Thanks in advance.

At 08:52 PM 2/16/05 +0000, nmitech wrote:
>Does anyone have problem to use P0.11 as GPIO? I built two
>prototypes, and both have the same problem on the port, P0.11 . I
>checked my circuit there is no short, nor broken trace from the CPU.
>I can toggle any port, except P0.11. Maybe my LPC2138 samples are
>bad? Any info is appreciated. Thanks in advance.


That's an open drain pin isn't it?  You'll need a pull-up.

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

Thanks Robert, That was it! Sorry, I did not pay attention to the I2C 
shared signal. 

---nmitech--
 
--- In lpc2000@yahoogroups.com, Robert Adsett <subscriptions@a...> 
wrote:
> At 08:52 PM 2/16/05 +0000, nmitech wrote:
> >Does anyone have problem to use P0.11 as GPIO? I built two
> >prototypes, and both have the same problem on the port, P0.11 . I
> >checked my circuit there is no short, nor broken trace from the 
CPU.
> >I can toggle any port, except P0.11. Maybe my LPC2138 samples are
> >bad? Any info is appreciated. Thanks in advance.
> 
> 
> That's an open drain pin isn't it?  You'll need a pull-up.
> 
> 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