参数资料
型号: PIC16F74T-I/PT
厂商: Microchip Technology
文件页数: 32/104页
文件大小: 0K
描述: IC MCU FLASH 4KX14 A/D 44TQFP
产品培训模块: Asynchronous Stimulus
标准包装: 1,200
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 33
程序存储器容量: 7KB(4K x 14)
程序存储器类型: 闪存
RAM 容量: 192 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
数据转换器: A/D 8x8b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-TQFP
包装: 带卷 (TR)
2002 Microchip Technology Inc.
DS30325B-page 23
PIC16F7X
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 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 soft-
ware should ensure the appropriate interrupt
bits are clear prior to enabling an interrupt.
R/W-0
R-0
R/W-0
PSPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
bit 7
bit 0
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 is completed (must be cleared in software)
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 3
SSPIF: Synchronous Serial Port (SSP) Interrupt Flag
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:
SPI
A transmission/reception has taken place.
I2C Slave
A transmission/reception has taken place.
I2C Master
A transmission/reception has taken place.
The initiated START condition was completed by the SSP module.
The initiated STOP condition was completed by the SSP module.
The initiated Restart condition was completed by the SSP module.
The initiated Acknowledge condition was completed by the SSP module.
A START condition occurred while the SSP module was IDLE (multi-master system).
A STOP condition occurred while the SSP module was IDLE (multi-master system).
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
Note 1: PSPIF is reserved on 28-pin devices; always maintain this bit clear.
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR reset
’1’ = Bit is set
’0’ = Bit is cleared
x = Bit is unknown
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