[chbot] Small Micros with I2C bus

Michael Pearce mike at kiwacan.co.nz
Thu Apr 21 16:48:17 BST 2011

If you want the smallest package then you might have to switch to a
Microchip PIC the PIC12F1840 and PIC12F1822 are 8 pin devices with
hardware I2C peripheral... about as small as you will get until they
release a PIC10F (6 pin) with one.

You can sample or buy from http://www.microchipdirect.com  (Cheapest)
Should also be available from Digikey, Farnell (Now Element14), RS, Mouser, etc.
SICOM might be able to order them in for you as well.. but will of
coarse add their 100%+ margin.

I am of course bias toward the PIC... especially since I now work for
Microchip in Arizona.


On Thu, Apr 21, 2011 at 8:08 AM, Paul Davey <plmdvy at gmail.com> wrote:
> I have a group project at university involving microcontrollers.  We
> will be using an Atmel AT91SAM7S256 micro.  The project involves
> interfacing several external components.  I thought it may be a good
> time to experiment with I2C and offload some of the sensing and input
> to a few smaller micros and have the main one query them over I2C for
> the results.  Since the project we are doing is a simplified model of
> part of a home automation system it would make sense that not all of
> the sensors are a reasonable distance from the main micro.
> Now that I have rambled on, to the point!  Does anyone know where I
> could get a small volume of small micros (like the ATTiny series or
> such) that preferably have I2C peripherals in them.  Where do people
> buy micros from in New Zealand :/
> Sorry for the rambling.
> Paul Davey
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