Datasheet

PIC12F635/PIC16F636/639
DS41232D-page 56 © 2007 Microchip Technology Inc.
TABLE 4-1: SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR, BOR,
WUR
Value on all
other Resets
PORTA
— — RA5 RA4 RA3 RA2 RA1 RA0 --xx xx00 --uu uu00
INTCON GIE
PEIE T0IE INTE RAIE T0IF INTF RAIF 0000 000x 0000 000x
TMR1L Holding Register for the Least Significant Byte of the 16-bit TMR1 Register xxxx xxxx uuuu uuuu
TMR1H Holding Register for the Most Significant Byte of the 16-bit TMR1 Register xxxx xxxx uuuu uuuu
T1CON T1GINV TMR1GE T1CKPS1 T1CKPS0 T1OSCEN T1SYNC
TMR1CS TMR1ON 0000 0000 uuuu uuuu
CMCON1
— — — — — —T1GSSCxSYNC ---- --10 ---- --10
CMCON0
C2OUT C1OUT C2INV C1INV CIS CM2 CM1 CM0 0000 0000 0000 0000
OPTION_REG
RAPU
INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111
TRISA
— — TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 --11 1111 --11 1111
WPUDA
— — WPUDA5 WPUDA4 — WPUDA2 WPUDA1 WPUDA0 --11 -111 --11 -111
IOCA
— — IOCA5 IOCA4 IOCA3 IOCA2 IOCA1 IOCA0 --00 0000 --00 0000
WDA
— — WDA5 WDA4 — WDA2 WDA1 WDA0 --11 -111 --11 -111
Legend: x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by PORTA.