PIC16F753 Datasheet, PDF (22/238 Pages) Microchip Technology – 14/16-Pin, Flash-Based 8-Bit CMOS Microcontrollers

PIC16F753/HV753
2.3.6 PIR1 REGISTER
The PIR1 register contains the Peripheral Interrupt flag
bits, as shown in Register 2-6.
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.
REGISTER 2-6: PIR1: PERIPHERAL INTERRUPT REQUEST REGISTER 1
R/W-0
R/W-0
U-0
TMR1GIF
ADIF
—
bit 7
U-0
R/W-0
R/W-0
R/W-0
—
HLTMR2IF HLTMR1IF TMR2IF
R/W-0
TMR1IF
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
bit 6
bit 5-4
bit 3
bit 2
bit 1
bit 0
TMR1GIF: TMR1 Gate Interrupt Flag bit
1 = Timer1 gate interrupt is pending
0 = Timer1 gate interrupt is not pending
ADIF: ADC Interrupt Flag bit
1 = ADC conversion complete
0 = ADC conversion has not completed or has not been started
Unimplemented: Read as ‘0’
HLTMR2IF: HLT2 to HLTPR2 Match Interrupt Flag bit
1 = HLT2 to HLTPR2 match occurred (must be cleared in software)
0 = HLT2 to HLTPR2 match did not occur
HLTMR1IF: HLT1 to HLTPR1 Match Interrupt Flag bit
1 = HLT1 to HLTPR1 match occurred (must be cleared in software)
0 = HLT1 to HLTPR1 match did not occur
TMR2IF: Timer2 to PR2 Match Interrupt Flag bit
1 = Timer2 to PR2 match occurred (must be cleared in software)
0 = Timer2 to PR2 match did not occur
TMR1IF: Timer1 Interrupt Flag bit
1 = Timer1 rolled over (must be cleared in software)
0 = Timer1 has not rolled over
DS40001709A-page 22
Preliminary
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