Pic 3.3v ?

[scottl]

I am running my PIC12F675 at 3.3V which connects to my Bluetooth radio! I want to connect an SPI device powered at 5V to the PIC. I know the PIC's inputs can handle 5V but will this cause any problems that both are running at different voltages?

Thanks in advance,

Scott

[Bakari]

Dear team,

This issue is top urgent for me. While I am designing my PCB, I remember that I can't get 1 Amp current from 9 Volt battery. So can any body help me to get 1 Amp from batteries? I was using my breadboard and I forgot this important issue. Please help me.

Best regards,
Bakari

[mister_e]

Why not using everything at 3.3 Volts?

[scottl]

I wish it were that easy!

I am using an AD7895 A/D to allow measuring -10 to +10 volts. The PIC12F675 will not allow me to measure this range. The AD7895 is 5V powered with an SPI interface. I am going to use the shiftin function to interface with the AD7895.

On the other side of the PIC12F675 I have a Bluetooth radio that is not 5V tolerant. I am trying to eliminate the level shifter between the PIC and Bluetooth radio so I want to run the PIC at 3.3V.

Thanks for the reply,

Scott