Heille salope, mon e-mail vidéotron ma chié dans les mains alors si tu essaie de me contacter c peine perdue.. j'attends encore après eux... HouHou service a la clientele 
Anyways. That's a strange design you have. What do you expect from your Opto-Coupler? A short-long history will be appreciated... at least for me the slow single brain cell.
Usually all SDA & SCL lines are connected together without anything else and use 2 pull-up resistors. that's it, that's all, no preservative, no aspartame, fat free. As usual, 0.1uF ceramice close to each I2C device is highly recommended.
On a design i'm working on NOW, i have 1 X PCF8574, 4 X 24LC64 on the same I2C bus and i use 4.7K without problems... as now
It appear in some case, on certain board design, that some I/O on certain PORT react weird depending the speed you mess with. Sometime reducing speed help. I can't remember on wich PIC i had a weird issue but i choose 2 I/O that are not one next to the oher (B.0, B1..) and it cure the problem. Seems to be another Read-Modify-Write issue.
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EDIT: Sorry Ralph, didn't notice your post... as you know, i'm still trying to deal with my emotions since you know why
Last edited by mister_e; - 23rd October 2005 at 12:33.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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