PIC16F882 datasheet(37/288 Pages) MICROCHIP

37 / 288 page

Preliminary

DS41291D-page 35

PIC16F882/883/884/886/887

2.2.2.7

PIR2 Register

The PIR2 register contains the interrupt flag bits, as

shown in Register 2-7.

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 of the INTCON register.

User

software

should

ensure

the

appropriate interrupt flag bits are clear prior

to enabling an interrupt.

PIR2: PERIPHERAL INTERRUPT REQUEST REGISTER 2

R/W-0

U-0

R/W-0

OSFIF

C2IF

C1IF

EEIF

BCLIF

ULPWUIF

—

CCP2IF

bit 7

bit 0

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

bit 7

OSFIF: Oscillator Fail Interrupt Flag bit

= System oscillator failed, clock input has changed to INTOSC (must be cleared in software)

= System clock operating

bit 6

C2IF: Comparator C2 Interrupt Flag bit

= Comparator output (C2OUT bit) has changed (must be cleared in software)

= Comparator output (C2OUT bit) has not changed

bit 5

C1IF: Comparator C1 Interrupt Flag bit

= Comparator output (C1OUT bit) has changed (must be cleared in software)

= Comparator output (C1OUT bit) has not changed

bit 4

EEIF: EE Write Operation Interrupt Flag bit

= Write operation completed (must be cleared in software)

= Write operation has not completed or has not started

bit 3

BCLIF: Bus Collision Interrupt Flag bit

= A bus collision has occurred in the MSSP when configured for I2C Master mode

= No bus collision has occurred

bit 2

ULPWUIF: Ultra Low-Power Wake-up Interrupt Flag bit

= Wake-up condition has occurred (must be cleared in software)

= No Wake-up condition has occurred

bit 1

Unimplemented: Read as ‘0’

bit 0

CCP2IF: CCP2 Interrupt Flag bit

Capture mode:

= A TMR1 register capture occurred (must be cleared in software)

= No TMR1 register capture occurred

Compare mode:

= A TMR1 register compare match occurred (must be cleared in software)

= No TMR1 register compare match occurred

PWM mode:

Unused in this mode

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