參數(shù)資料
型號: 16F871
廠商: Microchip Technology Inc.
英文描述: CAT 5E CROSSOVER PATCH CORD CABLE GREEN 6 FT
中文描述: 28/40-Pin 8位CMOS閃存微控制器
文件頁數(shù): 20/156頁
文件大小: 2816K
代理商: 16F871
PIC16F870/871
DS30569A-page 20
Preliminary
1999 Microchip Technology Inc.
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
CCP1IF
R/W-0
TMR2IF TMR1IF
R/W-0
R = Readable bit
W = Writable bit
- n= Value at POR reset
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
ADIF
: A/D Converter Interrupt Flag bit
1
= An A/D conversion completed
0
= The A/D conversion is not complete
RCIF
: USART Receive Interrupt Flag bit
1
= The USART receive buffer is full
0
= The USART receive buffer is empty
TXIF
: USART Transmit Interrupt Flag bit
1
= The USART transmit buffer is empty
0
= The USART transmit buffer is full
Unimplemented
:
Read as ‘0’
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
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
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.
bit 6:
bit 5:
bit 4:
bit 7:
bit 2:
bit 1:
bit 0:
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