PIC16F871 Datasheet

  • PIC16F871

  • 28/40-Pin, 8-Bit CMOS FLASH Microcontrollers

  • 1755.40KB

  • 172页

  • Microchip   Microchip

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PIC16F870/871
2.2.2.3
INTCON REGISTER
Note:
Interrupt flag bits get set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the global
enable bit, GIE (INTCON<7>). User soft-
ware should ensure the appropriate inter-
rupt flag bits are clear prior to enabling an
interrupt.
The INTCON Register is a readable and writable regis-
ter, which contains various enable and flag bits for the
TMR0 register overflow, RB Port change and External
RB0/INT pin interrupts.
REGISTER 2-3: INTCON REGISTER (ADDRESS 0Bh, 8Bh, 10Bh, 18Bh)
R/W-0
GIE
bit7
R/W-0
PEIE
R/W-0
T0IE
R/W-0
INTE
R/W-0
RBIE
R/W-0
T0IF
R/W-0
INTF
R/W-x
RBIF
bit0
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as 鈥?鈥?/div>
- n= Value at POR reset
bit 7:
GIE:
Global Interrupt Enable bit
1
= Enables all un-masked interrupts
0
= Disables all interrupts
PEIE:
Peripheral Interrupt Enable bit
1
= Enables all un-masked peripheral interrupts
0
= Disables all peripheral interrupts
T0IE:
TMR0 Overflow Interrupt Enable bit
1
= Enables the TMR0 interrupt
0
= Disables the TMR0 interrupt
INTE:
RB0/INT External Interrupt Enable bit
1
= Enables the RB0/INT external interrupt
0
= Disables the RB0/INT external interrupt
RBIE:
RB Port Change Interrupt Enable bit
1
= Enables the RB port change interrupt
0
= Disables the RB port change interrupt
T0IF:
TMR0 Overflow Interrupt Flag bit
1
= TMR0 register has overflowed (must be cleared in software)
0
= TMR0 register did not overflow
INTF:
RB0/INT External Interrupt Flag bit
1
= The RB0/INT external interrupt occurred (must be cleared in software)
0
= The RB0/INT external interrupt did not occur
RBIF:
RB Port Change Interrupt Flag bit
1
= At least one of the RB7:RB4 pins changed state (must be cleared in software)
0
= None of the RB7:RB4 pins have changed state
bit 6:
bit 5:
bit 4:
bit 3:
bit 2:
bit 1:
bit 0:
DS30569A-page 18
Preliminary
1999 Microchip Technology Inc.

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