參數(shù)資料
型號: PIC16F630T-E/SL
廠商: Microchip Technology
文件頁數(shù): 95/132頁
文件大?。?/td> 0K
描述: IC MCU FLASH 1KX14 14SOIC
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
標(biāo)準(zhǔn)包裝: 2,600
系列: PIC® 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 12
程序存儲器容量: 1.75KB(1K x 14)
程序存儲器類型: 閃存
EEPROM 大小: 128 x 8
RAM 容量: 64 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
包裝: 帶卷 (TR)
2010 Microchip Technology Inc.
DS40039F-page 65
PIC16F630/676
9.4
Interrupts
The PIC16F630/676 has 7 sources of interrupt:
External Interrupt RA2/INT
TMR0 Overflow Interrupt
PORTA Change Interrupts
Comparator Interrupt
A/D Interrupt (PIC16F676 only)
TMR1 Overflow Interrupt
EEPROM Data Write Interrupt
The Interrupt Control register (INTCON) and Peripheral
Interrupt register (PIR) record individual interrupt
requests in flag bits. The INTCON register also has
individual and Global Interrupt Enable bits.
A Global Interrupt Enable bit, GIE (INTCON<7>)
enables (if set) all unmasked interrupts, or disables (if
cleared) all interrupts. Individual interrupts can be
disabled through their corresponding enable bits in
INTCON register and PIE register. GIE is cleared on
Reset.
The return from interrupt instruction, RETFIE, exits
interrupt routine, as well as sets the GIE bit, which re-
enables unmasked interrupts.
The following interrupt flags are contained in the
INTCON register:
INT pin interrupt
PORTA change interrupt
TMR0 overflow interrupt
The peripheral interrupt flags are contained in the
special register PIR1. The corresponding interrupt
enable bit is contained in Special Register PIE1.
The following interrupt flags are contained in the PIR
register:
EEPROM data write interrupt
A/D interrupt
Comparator interrupt
Timer1 overflow interrupt
When an interrupt is serviced:
The GIE is cleared to disable any further interrupt
The return address is pushed onto the stack
The PC is loaded with 0004h
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 soft-
ware before re-enabling interrupts to avoid RA2/INT
recursive interrupts.
For external interrupt events, such as the INT pin, or
PORTA change interrupt, the interrupt latency will be
three or four instruction cycles. The exact latency
depends upon when the interrupt event occurs (see
Figure 9-11). The latency is the same for one or 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 multiple interrupt
requests.
Note 1: Individual interrupt flag bits are set,
regardless
of
the
status
of
their
corresponding mask bit or the GIE bit.
2: When an instruction that clears the GIE
bit is executed, any interrupts that were
pending for execution in the next cycle
are ignored. The interrupts which were
ignored are still pending to be serviced
when the GIE bit is set again.
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