Internal pullups 16C72

[Michael]

I can't remember if these are enabled by default or not (looks like not) -- could someone please help, don't have time to google it.

Using 16C72 port B

If not, what do I put in the code header?

THANKS !

[spcw1234]

OPTION_REG register

The OPTION_REG register is a readable and writable
register, which contains various control bits to configure
the TMR0 prescaler/WDT postscaler (single assignable
register known as the prescaler), the External INT
Interrupt, TMR0 and the weak pull-ups on PORTB.

bit 7:

RBPU: PORTB Pull-up Enable bit
1=PORTB pull-ups are disabled

0= PORTB pull-ups are enabled for all PORTB inputs

Page 12 in the datasheet

[Michael]

I know about the OPTION reg

OPTION_REG.7 = 0 ?

Enabled?

Sort of pressed for time today and having a hard time deciphering the datasheet

What bits are the other ports A and C? THANKS !

[Michael]

could it be?

only portb has the internal pullups?

[spcw1234]

Only port B has internal pull ups


OPTION_REG.7 = 0

should be what you need to turn on the internal pull ups on port b