At 09:32 AM 10/03/2001 +0100, Ben Laurie wrote: >Enzo Michelangeli wrote: > > > > ----- Original Message ----- > > From: "Bill Stewart" <[EMAIL PROTECTED]> > > > Sounds like you're starting to reinvent the I-Button. > > > (Dallas semiconductor's product - uses a small computer chip > > > and an infrared link attached to a watch battery.) > > > > Infrared link? As far as I know, the primary interface is the so-called > > 1-Wire, that uses the power lines also for I/O. > >It is, in fact, the only interface. As you say, the I/O lines are used >for power (or the power lines are used for I/O, depending how you look >at it). Which I think is really cute. The other highly cute thing is >that you can put any number of iButtons on the same 1-wire interface in >any topology and it still works (I can give a summary of how this works, >if people care). > >Note that 1-wire is really 2, of course, but since the other is ground, >you typically don't have to wire it, if you don't want to.
Yes, I spaced on that, must have been thinking of something else :-) Sorry. Anyway, to partially redeem my gaffe, the web site for Dallas Semiconductor who makes the things is www.dalsemi.com , and http://dbserv.maxim-ic.com/1-Wire.cfm and http://para.maxim-ic.com/iButton.htm are where some of the good data lives. --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]
