Lpc2000

On 29 Nov 2004 at 17:53, Richard wrote:

> 
> 
> Note:  5V on any pin that CAN be configured as an ADC input will
> corrupt the ADC conversion values.
> 

At least now I know why my attempt to use only one A/D channel, and the rest as 5V 
digital inputs corrupted the A/D readings on my analog input. I hope Philips will update
the user manual to spel this sort of behaviour more clearly. Finding this out after one 
has manufactured a 10 layer PCB is not the most convenient.

Regards
   Anton Erasmus


> --- In lpc2000@yahoogroups.com, "Anton Erasmus" <antone@s...> wrote: >
> On 29 Nov 2004 at 12:29, digtalfreak wrote: > > > > > > > I am using
> the LPC2129 in an application and I need to know if the > > analog
> port will be damaged if the port gets more than V3A at any > > time.
> The manual says that the voltage must not be over V3A or the > >
> analog input readings will be invalid. Does that mean that they will >
> > be invalid forever or only for the moment where the voltage is over
> > > V3A? > > > > The pins are supposed to be 5V tolerant, hence my
> assumption is that they should > be able to handle up to 5V. The A/D
> converter is designed, so that it's full range is > only V3A volts,
> hence an input above this voltage will give invalid A/D results. > >
> Regards >    Anton Erasmus > > > > > > ------------------------ Yahoo!
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> > > > -- > A J Erasmus
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-- 
A J Erasmus