PIC16F676-ESLASHST datasheet(15/132 Pages) MICROCHIP

15 / 132 page

 2010 Microchip Technology Inc.

DS40039F-page 15

PIC16F630/676

2.2.2.3

INTCON Register

The INTCON register is a readable and writable

for TMR0 register overflow, PORTA change and

external RA2/INT pin interrupts.

INTCON — INTERRUPT CONTROL REGISTER (ADDRESS: 0Bh OR 8Bh)

Note:

Interrupt flag bits are set when an interrupt

condition occurs, regardless of the state of

its corresponding enable bit or the global

enable bit, GIE (INTCON<7>). User

software should ensure the appropriate

interrupt flag bits are clear prior to enabling

an interrupt.

R/W-0

GIE

PEIE

T0IE

INTE

RAIE

T0IF

INTF

RAIF

bit 7

bit 0

bit 7

GIE: Global Interrupt Enable bit

1 = Enables all unmasked interrupts

0 = Disables all interrupts

bit 6

PEIE: Peripheral Interrupt Enable bit

1 = Enables all unmasked peripheral interrupts

0 = Disables all peripheral interrupts

bit 5

T0IE: TMR0 Overflow Interrupt Enable bit

1 = Enables the TMR0 interrupt

0 = Disables the TMR0 interrupt

bit 4

INTE: RA2/INT External Interrupt Enable bit

1 = Enables the RA2/INT external interrupt

0 = Disables the RA2/INT external interrupt

bit 3

RAIE: Port Change Interrupt Enable bit(1)

1 = Enables the PORTA change interrupt

0 = Disables the PORTA change interrupt

bit 2

T0IF: TMR0 Overflow Interrupt Flag bit(2)

1 = TMR0 register has overflowed (must be cleared in software)

0 = TMR0 register did not overflow

bit 1

INTF: RA2/INT External Interrupt Flag bit

1 = The RA2/INT external interrupt occurred (must be cleared in software)

0 = The RA2/INT external interrupt did not occur

bit 0

RAIF: Port Change Interrupt Flag bit

1 = When at least one of the PORTA <5:0> pins changed state (must be cleared in software)

0 = None of the PORTA <5:0> pins have changed state

Note 1: IOCA register must also be enabled.

2: T0IF bit is set when Timer0 rolls over. Timer0 is unchanged on Reset and should

be initialized before clearing T0IF bit.

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

- n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

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