Speakerguy
Active Member
I'm interfacing a PIC with a bunch of 3.3V devices. I *might* need to run the PIC off 5V for reasons I'll mention later. If the PIC is running off 5V, can I just use pull up resistors on the SDA and SCL lines to the 3.3V supply since they are open drain/open collector?
The reason I might need to use 5V is because of ICSP programming and USB stuff. I have to check if the 18F2550 can handle flash mem erases with a 3.3V supply with my programmer (melabs U2) and whether or not I need a 5V supply for any of the USB stuff.
The reason I might need to use 5V is because of ICSP programming and USB stuff. I have to check if the 18F2550 can handle flash mem erases with a 3.3V supply with my programmer (melabs U2) and whether or not I need a 5V supply for any of the USB stuff.