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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. |
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LPC2138 with P0.11 not working
Started by ●February 16, 2005
Reply by ●February 16, 20052005-02-16
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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 |
Reply by ●February 17, 20052005-02-17
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Thanks Robert, That was it! Sorry, I did not pay attention to the I2C shared signal. ---nmitech-- --- In , 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 |
