Quote Originally Posted by savnik View Post
All my programms with I2C are work.
I use 10K from 5v to pin of pic16f628a.
Now i want to control with i2c (pic16f628a) one NS73M which work at 3,3V.
May i have any problem if i use 10K from 5V to pin from NS73M.
Hi, Savnik

Mikroelektronika MMC/SD card module works like that : Pic with 5 volts and card with 3v3 ...
Everything fine.

But just verify you use TTL inputs of the PIC and not Schmitt trigger ones ...

or use translator chips ...

Alain