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DS40039E-page 19

The ANSEL (91h) and CMCON (19h)
registers must be initialized to configure an
analog channel as a digital input. Pins
configured as analog inputs will read ‘0’.
The ANSEL register is defined for the
PIC16F676.

</code>
bcf STATUS,RP0 ;Bank 0
clrf PORTA ;Init PORTA
movlw 05h ;Set RA<2:0> to
movwf CMCON ;digital I/O
bsf STATUS,RP0 ;Bank 1
clrf ANSEL ;digital I/O
movlw 0Ch ;Set RA<3:2> as inputs
movwf TRISA ;and set RA<5:4,1:0>
;as outputs
bcf STATUS,RP0 ;Bank 0
</code>