Lpc2000

On Sep 7, 2004, at 4:29 AM, Leon Heller wrote:

>>       I am currently looking at using a LPC2106 in an access control
>> unit to interface to a number of Dallas DS1990 iButtons. Am I correct
>> in thinking that with a little code the iButtons could be interfaced
>> to any of the LPC2106's GPIO pins ? Or would the iButton need to be
>> interfaced to one the processors serial IO pins ?
>
> The interface has to be 'bit-banged' in software so any I/O chip may be
> used. Several people have done this sort of thing with PICs and AVRs, 
> it
> shouldn't be difficult to modify the code for the LPC2106.
>

This maxim tech note talks about how to interface a one-wire device to 
a uart. Rather expensive use of resources, but if you're not using the 
uart for anything else...

http://www.maxim-ic.com/appnotes.cfm/appnote_number/1189

Shannon