OPTION (SFR) register - Bit clearance to turn on the weak internal pull-ups of port B

Q.  Which bit/s should be necessarily cleared in OPTION (SFR) register in order to turn on the weak internal pull-ups of port B?
- Published on 16 Nov 15

a. RPO
b. RPBU
c. RBIF
d. All of the above

ANSWER: RPBU

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