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參數(shù)資料
| 型號： | 16F84 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | CAT 5E CROSSOVER, BLUE 15 FT PATCH CABLE |
| 中文描述： | 18引腳閃存/ EEPROM的8位微控制器 |
| 文件頁數(shù)： | 47/124頁 |
| 文件大?。?/td> | 1322K |
| 代理商： | 16F84 |
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PIC16F8X
1998 Microchip Technology Inc.
DS30430C-page 47
8.9
Interrupts
The PIC16F8X has 4 sources of interrupt:
External interrupt RB0/INT pin
TMR0 overflow interrupt
PORTB change interrupts (pins RB7:RB4)
Data EEPROM write complete interrupt
The interrupt control register (INTCON) records
individual interrupt requests in flag bits. It also contains
the individual and global interrupt enable bits.
The global interrupt enable bit, GIE (INTCON<7>)
enables (if set) all un-masked interrupts or disables (if
cleared) all interrupts. Individual interrupts can be
disabled through their corresponding enable bits in
INTCON register. Bit GIE is cleared on reset.
The “return from interrupt” instruction,
RETFIE
, exits
interrupt routine as well as sets the GIE bit, which
re-enable interrupts.
The RB0/INT pin interrupt, the RB port change inter-
rupt and the TMR0 overflow interrupt flags are con-
tained in the INTCON register.
When an interrupt is responded to; the GIE bit is
cleared to disable any further interrupt, the return
address is pushed onto the stack and the PC is loaded
with 0004h. For external interrupt events, such as the
RB0/INT pin or PORTB change interrupt, the interrupt
latency will be three to four instruction cycles. The exact
latency depends when the interrupt event occurs
(Figure 8-17). The latency is the same for both one and
two cycle instructions. Once in the interrupt service
routine the source(s) of the interrupt can be determined
by polling the interrupt flag bits. The interrupt flag bit(s)
must be cleared in software before re-enabling
interrupts to avoid infinite interrupt requests.
FIGURE 8-16: INTERRUPT LOGIC
Note 1:
Individual interrupt flag bits are set
regardless
of
corresponding mask bit or the GIE bit.
the
status
of
their
RBIF
RBIE
T0IF
T0IE
INTF
INTE
GIE
EEIE
Wake-up
Interrupt to CPU
EEIF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 16F84A | CAT 5E CROSSOVER PATCH CORD CABLE BLUE 20 FT |
| 16F871 | CAT 5E CROSSOVER PATCH CORD CABLE GREEN 6 FT |
| 16F872 | CAT 5E CROSSOVER PATCH CORD CABLE GREEN 10 FT |
| 16F876A | 28/40-pin Enhanced FLASH Microcontrollers |
| 16F876 | CAT 5E CROSSOVER, GREEN 15 FT PATCH CABLE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 16F84A | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller |
| 16F870 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28/40-Pin 8-Bit CMOS FLASH Microcontrollers |
| 16F871 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28/40-Pin 8-Bit CMOS FLASH Microcontrollers |
| 16F872 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28-Pin, 8-Bit CMOS FLASH Microcontroller |
| 16F876 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28/40-pin 8-Bit CMOS FLASH Microcontrollers |
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