PIC16F913 datasheet(28/272 Pages) MICROCHIP

28 / 272 page

PIC16F917/916/914/913

DS41250E-page 26

Preliminary

2.2.2.6

PIR1 Register

The PIR1 register contains the interrupt flag bits, as

shown in Register 2-6.

PIR1 – PERIPHERAL INTERRUPT REQUEST REGISTER 1 (ADDRESS: 0Ch)

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

(INTCON<7>).

User

software should ensure the appropriate

interrupt flag bits are clear prior to enabling

an interrupt.

R/W-0

R-0

R/W-0

EEIF

ADIF

RCIF

TXIF

SSPIF

CCP1IF

TMR2IF

TMR1IF

bit 7

bit 0

bit 7

EEIF: EE Write Operation Interrupt Flag bit

= The write operation completed (must be cleared in software)

= The write operation has not completed or has not started

bit 6

ADIF: A/D Converter Interrupt Flag bit

= The A/D conversion completed (must be cleared in software)

= The A/D conversion is not complete

bit 5

RCIF: USART Receive Interrupt Flag bit

= The USART receive buffer is full (cleared by reading RCREG)

= The USART receive buffer is not full

bit 4

TXIF: USART Transmit Interrupt Flag bit

= The USART transmit buffer is empty (cleared by writing to TXREG)

= The USART transmit buffer is full

bit 3

SSPIF: Synchronous Serial Port (SSP) Interrupt Flag bit

= The Transmission/Reception is complete (must be cleared in software)

= Waiting to Transmit/Receive

bit 2

CCP1IF: CCP1 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

bit 1

TMR2IF: TMR2 to PR2 Interrupt Flag bit

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

= No TMR2 to PR2 match occurred

bit 0

TMR1IF: TMR1 Overflow Interrupt Flag bit

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

= The TMR1 register did not overflow

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

PIC16F913 Datasheet(PDF) 28 Page - Microchip Technology

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