AVR-Chat

It's going ok, thanks, but it's currently stalled waiting for a pcb to be
made.   I'm going to give I2C a try; switching to RS485 (which I do use for
other, longer-distance communication) adds complexity and other
disadvantages that I'd prefer to avoid if possible.   It will be the backup
solution if I2C doesn't work.

 

I was only skimming the voltage-translation thread and this may not be
relevant, but since you mention that the PCA9517 is a solution, are you also
aware of the Phillips App Note AN97055, where they suggest four mosfets,
BSN10, BSN20, BSS83, BSS88 for level translation?

 

Steve

 

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of Graham Davies
Sent: Thursday, April 09, 2009 4:48 AM
To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] Re: i2c and twisted pair

 






--- In AVR-Chat@yahoogroups.com <mailto:AVR-Chat%40yahoogroups.com> , "Steve
Hodge" <steve@...> wrote:
>
> Isn't that what a PCA9517 ... does

No, not at all. I think Brian is telling you to use differential signaling
without understanding the I2C bus.

However, it turns out that the PCA9517 is a solution to the problem I
described in the "Voltage level translation" thread, so thanks for
mentioning it.

What you're doing with I2C sounds scary to me, but others have been
encouraging, so I hope it's going well.

Graham.





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