Datasheet

PIC12F508/509/16F505
DS41236B-page 30 Preliminary © 2005 Microchip Technology Inc.
TABLE 5-1: SUMMARY OF PORT REGISTERS
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
Power-On
Reset
Value on
All Other
Resets
N/A TRISGPIO
(1)
— — I/O Control Register --11 1111 --11 1111
N/A TRISB
(2)
— — I/O Control Register --11 1111 --11 1111
N/A TRISC
(2)
— — I/O Control Register --11 1111 --11 1111
N/A OPTION
(1)
GPWU GPPU TOCS TOSE PSA PS2 PS1 PS0 1111 1111 1111 1111
N/A OPTION
(2)
RBWU RBPU TOCS TOSE PSA PS2 PS1 PS0 1111 1111 1111 1111
03h STATUS
(1)
GPWUF — PAO TO PD Z DC C 0-01 1xxx q00q quuu
(3)
03h STATUS
(2)
RBWUF — PAO TO PD Z DC C 0-01 1xxx q00q quuu
(3)
06h GPIO
(1)
— — GP5 GP4 GP3 GP2 GP1 GP0 --xx xxxx --uu uuuu
06h PORTB
(2)
— — RB5 RB4 RB3 RB2 RB1 RB0 --xx xxxx --uu uuuu
07h PORTC
(2)
— — RC5 RC4 RC3 RC2 RC1 RC0 --xx xxxx --uu uuuu
Legend: Shaded cells are not used by Port registers, read as ‘0’. – = unimplemented, read as ‘0’, x = unknown, u = unchanged,
q = depends on condition.
Note 1: PIC12F508/509 only.
2: PIC16F505 only.
3: If Reset was due to wake-up on pin change, then bit 7 = 1. All other Resets will cause bit 7 = 0.