PIC voltage levels

[barkerben]

Hi,

This is only slightly related to Picbasic...

I have a PIC running of 3.3v in a circuit. I realise that the MCLR pin is connected, through a pull up resistor, to a 5v line. Both voltage lines share a common earth.

Is this likely to cause problems? Are there any major disadvantages to just disabling the MCLR pin completely and leaving it floating?

Thanks,

Ben

[barkerben]

Hmmm...

Page 131 of the data sheet:

http://www.rennes.supelec.fr/ren/fi/elec/ftp/mcu/pic/docs/16f62x.pdf

Seems to say that the disaprity is ok. The voltage on the MCLR pin can range from Vss-0.3 to Vss+14. So pulling it to 5v should not be a problem, even if the rest of the PIC is running of 3v3

ben