PIC16LF870-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LF870-I/SO

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

Microchip Technology 

PIC16F870/871

2.2.2.5 PIR1 REGISTER

The PIR1 Register contains the individual flag bits for

the peripheral interrupts.

REGISTER 2-5: PIR1 REGISTER (ADDRESS 0Ch)

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 bits are clear prior to enabling an

interrupt.

R/W-0

PSPIF(1)

bit7

R/W-0

ADIF

R-0

RCIF

R-0

TXIF

U-0 R/W-0 R/W-0 R/W-0

 CCP1IF TMR2IF TMR1IF

bit0

bit 7:

PSPIF(1): Parallel Slave Port Read/Write Interrupt Flag bit

1 = A read or a write operation has taken place (must be cleared in software)

0 = No read or write has occurred

bit 6:

ADIF: A/D Converter Interrupt Flag bit

1 = An A/D conversion completed

0 = The A/D conversion is not complete

bit 5:

RCIF: USART Receive Interrupt Flag bit

1 = The USART receive buffer is full

0 = The USART receive buffer is empty

bit 4:

TXIF: USART Transmit Interrupt Flag bit

1 = The USART transmit buffer is empty

0 = The USART transmit buffer is full

bit 7: Unimplemented: Read as ‘0’

bit 2:

CCP1IF: CCP1 Interrupt Flag bit

Capture Mode

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

0 = No TMR1 register capture occurred

Compare Mode

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

0 = No TMR1 register compare match occurred

PWM Mode

Unused in this mode

bit 1:

TMR2IF: TMR2 to PR2 Match Interrupt Flag bit

1 = TMR2 to PR2 match occurred (must be cleared in software)

0 = No TMR2 to PR2 match occurred

bit 0: TMR1IF: TMR1 Overflow Interrupt Flag bit

1 = TMR1 register overflowed (must be cleared in software)

0 = TMR1 register did not overflow

Note 1: PSPIF is reserved on the PIC16F870; always maintain this bit clear.

R = Readable bit

W = Writable bit

- n= Value at POR reset

DS30569A-page 20

Preliminary

© 1999 Microchip Technology Inc.

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