Lpc2000

I think that we ought to make a list of all the "mistakes" that is generally
made with these controllers.

There are a lot of people (my self included) that fell for all the nice
features but when you look closer and pay the amount of money for PCB's you
find out where the sun don't shine ... 

Would it be possible to summarize a list on the group page of the common
mistakes etc? 

For instance: 

SPI master = Hardware High on SS pin! 

And very important Bootloader behaviour! What does it do and how can it be
worked around as someone has talked about and what these issues mean from a
hardware point of view etc.
 
And apparently (maybe) There's another thing that the ADC can't stand 5V on
a pin that Is related to it (What kind of sick cr*p is that?) 

I fancy these controllers don't get me wrong but one can easily be _very_
upset using _alot_ of time and money making PCB's and then finding out all
the beginner mistakes ... 

Lets make a list of beginner mistakes etc. I'll help people help them
selves.

Who's in and who's out :)

Regards
Lasse 




-----Original Message-----
From: Anton Erasmus [mailto:antone@...] 
Sent: 29. november 2004 21:44
To: lpc2000@yahoogroups.com
Subject: Re: [lpc2000] Re: LPC2129, analog port question.


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




 
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