Lpc2000

Hi Robert,

  I agree since this is a tight time frame project. I am winding up
using the 16 bit version of the parts which will give me 32 bits of
I/O and I can connect the interrupts to the processor to determine
when an input port changes. This project has 30 inputs and at approx.
8MHz clock will give me just enought time to collect the port values
and perform procedure in under 26us.

  Rob's suggestion on the other hand is a cheaper way of doing this,
but I will not have the time to actually test the idea until the next
project (which is after this one).

 Thanks to both of you for your help. 

regards,
Charles


--- In lpc2000@yahoogroups.com, "rtstofer" <rstofer@p...> wrote:
>
> --- In lpc2000@yahoogroups.com, "charlesgrenz" <charles.grenz@s...> 
> wrote:
> >
> > Hi Rob, thanks for the seuggestion and link. I looked at that at one
> > time as a cheap expansion for the 2106 and even ordered some parts to
> > play with but haven't had time to try it. Time is critical on this
> > project, so I was going to go the safe route and use the Microchip
> > version for now. 
> > 
> > regards,
> > Charles
> 
> Plus, you can configure the MCP23S08 pins as either input or output, 
> get interrupt-on-change, set the polarity of the 'normal' state and a 
> bunch of other things.  It is a really nice chip.
> 
> Richard
>