AVR-Chat

> you can use a 74hc4053 switch , to switch between two micro controller

Not necessary.  The I2C bus can be multi-master, see here:
http://www.i2c-bus.org/MultiMaster/

If you can dedicate a data line between the two processors then this can
be used to explicitly share the bus rather than sniffing clock/data line
states.

DLC


> --- On Mon, 11/9/09, Emerson Santos <emersonsantosrj@gmail.com> wrote:
>
>
> From: Emerson Santos <emersonsantosrj@gmail.com>
> Subject: [AVR-Chat] Share a memory 24C256
> To: AVR-Chat@yahoogroups.com
> Date: Monday, November 9, 2009, 3:26 AM
>
>
> Â 
>
>
>
> Hi !!!
>
> Is possible share a i2c 24256 with 2 AVRS ??? I have a dedicade PIN in
> both
> where when 1 the AVR Master iss writing then other AVR wait and vice versa
> when the pin is 0
>
> Anyone make this circuit ?
>
> Thanks
>
> Emerson
>
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-- 
Dennis Clark
TTT Enterprises