PIC16LF720_11 Datasheet, PDF (40/244 Pages) Microchip Technology – 20-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC16(L)F720/721
4.5.1 INTCON REGISTER
The INTCON register is a readable and writable
register, which contains the various enable and flag bits
for TMR0 register overflow, PORTB change and
external RA2/INT pin interrupts.
Note:
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Interrupt Enable bit, GIE of the INTCON
register. User software should ensure the
appropriate interrupt flag bits are clear
prior to enabling an interrupt.
REGISTER 4-1: INTCON: INTERRUPT CONTROL REGISTER
R/W-0
GIE
bit 7
R/W-0
PEIE
R/W-0
TMR0IE
R/W-0
INTE
R/W-0
RABIE⁽¹⁾
R/W-0
TMR0IF⁽²⁾
R/W-0
INTF
R/W-x
RABIF
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
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
TMR0IE: Timer0 Overflow Interrupt Enable bit
1 = Enables the Timer0 interrupt
0 = Disables the Timer0 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
RABIE: PORTA or PORTB Change Interrupt Enable bit⁽¹⁾
1 = Enables the PORTA or PORTB change interrupt
0 = Disables the PORTA or PORTB change interrupt
bit 2
TMR0IF: Timer0 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
RABIF: PORTA or PORTB Change Interrupt Flag bit
1 = When at least one of the PORTA or PORTB general purpose I/O pins changed state (must be
cleared in software)
0 = None of the PORTA or PORTB general purpose I/O pins have changed state
Note 1: The appropriate bits in the IOCB register must also be set.
2: TMR0IF bit is set when Timer0 rolls over. Timer0 is unchanged on Reset and should be initialized before
clearing TMR0IF bit.
DS41430B-page 40
Preliminary
 2011 Microchip Technology Inc.