參數(shù)資料
型號(hào)： 24C01SC
廠商： Microchip Technology Inc.
英文描述： 1K 5.0V IIC serial EEPROMs(2.5V~5.5V,1K位,1M次擦寫周期,ISO7816標(biāo)準(zhǔn))
中文描述： 一千5.0V國際進(jìn)口電壓（2.5V?5.5V的，每1000位，100萬次擦寫周期，符合ISO7816標(biāo)準(zhǔn)串行EEPROM）
文件頁數(shù)： 103/170頁
文件大?。?/td> 4191K
代理商： 24C01SC
2003 Microchip Technology Inc.
Preliminary
DS40300C-page 101
PIC16F62X
14.6
Interrupts
The PIC16F62X has 10 sources of interrupt:
External Interrupt RB0/INT
TMR0 Overflow Interrupt
PORTB Change Interrupts (pins RB7:RB4)
Comparator Interrupt
USART Interrupt TX
USART Interrupt RX
CCP Interrupt
TMR1 Overflow Interrupt
TMR2 Match Interrupt
EEPROM
The interrupt control register (INTCON) records
individual interrupt requests in flag bits. It also has
individual and global interrupt enable bits.
A 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. GIE is cleared on RESET.
The “return from interrupt” instruction,
RETFIE
, exits
interrupt routine as well as sets the GIE bit, which re-
enable RB0/INT interrupts.
The INT pin interrupt, the RB port change interrupt and
the TMR0 overflow interrupt flags are contained in the
INTCON register.
The peripheral interrupt flag is contained in the special
register PIR1. The corresponding interrupt enable bit is
contained in special registers PIE1.
When an interrupt is responded to, the GIE is cleared
to disable any further interrupt, the return address is
pushed into the stack and 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 RB0/INT
recursive interrupts.
For external interrupt events, such as the INT pin or
PORTB change interrupt, the interrupt latency will be
three or four instruction cycles. The exact latency
depends when the interrupt event occurs (Figure 14-
15). 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. Individual interrupt
flag bits are set regardless of the status of their
corresponding mask bit or the GIE bit.
FIGURE 14-14:
INTERRUPT LOGIC
Note 1:
Individual interrupt flag bits are set
regardless
of
corresponding mask bit or the GIE bit.
the
status
of
their
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 CPU will execute a
NOP
in the cycle immediately following the
instruction which clears the GIE bit. The
interrupts which were ignored are still
pending to be serviced when the GIE bit
is set again.
TMR2IF
TMR2IE
CCP1IF
CCP1IE
CMIF
CMIE
TXIF
TXIE
RCIF
RCIE
EEIF
T0IF
T0IE
INTF
INTE
RBIF
RBIE
GIE
PEIE
Wake-up (If in SLEEP mode)
Interrupt to CPU
EEIE
TMR1IF
TMR1IE
相關(guān)PDF資料
PDF描述
24C02SC 2K 5.0V IIC serial EEPROMs(2.5V~5.5V,2K位,1M次擦寫周期,ISO7816標(biāo)準(zhǔn))
24C02A 2K 5.0V CMOS serial EEPROMs(2K位,5.0V,IIC串行EEPROM)
24C02C 2K 5.0V IIC serial EEPROMs(2K位，1M次擦寫周期，硬件寫保護(hù)，二線串行接口,EEPROM)
24C02C-EP 2K 5.0V I 2 C ⑩ Serial EEPROM
24C02C-ESN 2K 5.0V I 2 C ⑩ Serial EEPROM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
24C01SC/S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SERIAL EEPROM|128X8|CMOS|DIE
24C01SC-/S 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:1K/2K 5.0V I2C Serial EEPROMs for Smart Cards
24C01SC/S08 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SERIAL EEPROM|128X8|CMOS|DIE
24C01SC-/S08 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:1K/2K 5.0V I2C Serial EEPROMs for Smart Cards
24C01SC/W 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SERIAL EEPROM|128X8|CMOS|WAFER
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