Pullup confusion 12c508a

[Aussie Barry]

Hi Michael,

The PIC12C508A doesn't have a PORTB so your WPUB statement will obviously create an error.
As mark_s has already stated, setting option register bit 6 to 0 will enable weak pull ups on GP0, GP1 and GP3
These pins must be set as inputs.

Note, hard pull-ups can always be implemented instead of weak pull-ups.

I trust this helps.

Cheers
Barry
VK2XBP

[Michael]

Well actually I'm going to use a 12F675 as I now find out I can get it programmed. So, on a 12F675 -- how would I enable a pullup on pin 6 GPIO.1 ?

THANKS much.

By the way, "weak" pullup must mean what? Current capabiltiy of the resistor or something?

[mark_s]

Try this for setting the pull-up on GPIO.1

OPTION_REG.7 = 0 ' Set global GPPU
WPU.1 = 1             'pull-up on gpio1 enabled