AVR-Chat

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


[Non-text portions of this message have been removed]

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

--- 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


  



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

[Non-text portions of this message have been removed]









      

[Non-text portions of this message have been removed]

> 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
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>


-- 
Dennis Clark
TTT Enterprises