PIC12F508 datasheet(32/106 Pages) MICROCHIP

32 / 106 page

PIC12F508/509/16F505

DS41236D-page 30

Preliminary

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

N/A

TRISB(2)

—

I/O Control Register

--11 1111

N/A

TRISC(2)

—

I/O Control Register

--11 1111

N/A

OPTION(1)

GPWU

GPPU

TOCS

TOSE

PSA

PS2

PS1

PS0

1111 1111

N/A

OPTION(2)

RBWU

RBPU

TOCS

TOSE

PSA

PS2

PS1

PS0

1111 1111

03h

STATUS(1)

GPWUF

—

PAO

0-01 1xxx

q00q quuu

(3)

03h

STATUS(2)

RBWUF

—

PAO

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,

= depends on condition.

Note 1:

PIC12F508/509 only.

PIC16F505 only.

If Reset was due to wake-up on pin change, then bit 7 = 1. All other Resets will cause bit 7 = 0.

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