參數(shù)資料
型號: PIC16LF818T-I/SS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 10 MHz, RISC MICROCONTROLLER, PDSO20
封裝: 0.209 INCH, PLASTIC, MO-150, SSOP-20
文件頁數(shù): 92/176頁
文件大小: 3124K
代理商: PIC16LF818T-I/SS
PIC16F818/819
DS39598E-page 20
2004 Microchip Technology Inc.
2.2.2.5
PIR1 Register
This register contains the individual flag bits for the
peripheral interrupts.
REGISTER 2-5:
PIR1: PERIPHERAL INTERRUPT REQUEST (FLAG) 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
Interrupt Enable bit, GIE (INTCON<7>).
User software should ensure the appropri-
ate interrupt flag bits are clear prior to
enabling an interrupt.
U-0
R/W-0
U-0
R/W-0
—ADIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
bit 7
bit 0
bit 7
Unimplemented: Read as ‘0’
bit 6
ADIF: A/D Converter Interrupt Flag bit
1
= An A/D conversion completed
0
= The A/D conversion is not complete
bit 5-4
Unimplemented: Read as ‘0’
bit 3
SSPIF: Synchronous Serial Port (SSP) Interrupt Flag bit
1
= The SSP interrupt condition has occurred and must be cleared in software before returning
from the Interrupt Service Routine. The conditions that will set this bit are a transmission/
reception has taken place.
0
= No SSP interrupt condition has occurred
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
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
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