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| 型號： | PIC12F681 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 8-Pin, 8-Bit CMOS Enhanced FLASH Microcontroller with Serial I/O Interface(-2.0~5.5V,串行I/O接口,閃速微控制器) |
| 中文描述： | 8引腳，8位串行我的CMOS增強型閃存微控制器/ O接口（-2.0?5.5V的，串行的I / O接口，閃速微控制器） |
| 文件頁數(shù)： | 59/170頁 |
| 文件大小： | 4191K |
| 代理商： | PIC12F681 |
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2003 Microchip Technology Inc.
Preliminary
DS40300C-page 57
PIC16F62X
9.6
Comparator Interrupts
The Comparator Interrupt flag is set whenever there is
a change in the output value of either comparator.
Software will need to maintain information about the
status of the output bits, as read from CMCON<7:6>, to
determine the actual change that has occurred. The
CMIF bit, PIR1<6>, is the Comparator Interrupt Flag.
The CMIF bit must be RESET by clearing ‘0’. Since it is
also possible to write a '1' to this register, a simulated
interrupt may be initiated.
The CMIE bit (PIE1<6>) and the PEIE bit
(INTCON<6>) must be set to enable the interrupt. In
addition, the GIE bit must also be set. If any of these
bits are clear, the interrupt is not enabled, though the
CMIF bit will still be set if an interrupt condition occurs.
The user, in the interrupt service routine, can clear the
interrupt in the following manner:
a)
Any write or read of CMCON. This will end the
mismatch condition.
b)
Clear flag bit CMIF.
A mismatch condition will continue to set flag bit CMIF.
Reading CMCON will end the mismatch condition, and
allow flag bit CMIF to be cleared.
9.7
Comparator Operation During
SLEEP
When a comparator is active and the device is placed
in SLEEP mode, the comparator remains active and
the interrupt is functional if enabled. This interrupt will
wake-up the device from SLEEP mode when enabled.
While the comparator is powered-up, higher SLEEP
currents than shown in the power-down current
specification will occur. Each comparator that is
operational will consume additional current as shown in
the comparator specifications. To minimize power
consumption while in SLEEP mode, turn off the
comparators, CM<2:0> = 111, before entering SLEEP.
If the device wakes-up from SLEEP, the contents of the
CMCON register are not affected.
9.8
Effects of a RESET
A device RESET forces the CMCON register to its
RESET state. This forces the Comparator module to be
in the comparator RESET mode, CM2:CM0 = 000.
This ensures that all potential inputs are analog inputs.
Device current is minimized when analog inputs are
present at RESET time. The comparators will be
powered-down during the RESET interval.
9.9
Analog Input Connection
Considerations
A simplified circuit for an analog input is shown in
Figure 9-4. Since the analog pins are connected to a
digital output, they have reverse biased diodes to V
DD
and V
SS
. The analog input therefore, must be between
V
SS
and V
DD
. If the input voltage deviates from this
range by more than 0.6V in either direction, one of the
diodes is forward biased and a latchup may occur. A
maximum
source
impedance
recommended for the analog sources. Any external
component connected to an analog input pin, such as
a capacitor or a Zener diode, should have very little
leakage current.
of
10 k
is
Note:
If a change in the CMCON register
(C1OUT or C2OUT) should occur when a
read operation is being executed (start of
the Q2 cycle), then the CMIF (PIR1<6>)
interrupt flag may not get set.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC12F683 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology |
| PIC12F683 DEVELOPMENT BOARD KIT | 制造商:Custom Computer Services (CCS) 功能描述:BOARD DEV FOR PIC12F683 |
| PIC12F683 DEVELOPMENT KIT | 功能描述:KIT DEV EMBEDDED C RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 通用嵌入式開發(fā)板和套件（MCU、DSP、FPGA、CPLD等） 系列:- 標(biāo)準包裝:1 系列:PICDEM™ 類型:MCU 適用于相關(guān)產(chǎn)品:PIC10F206，PIC16F690，PIC16F819 所含物品:板，線纜，元件，CD，PICkit 編程器 產(chǎn)品目錄頁面:659 (CN2011-ZH PDF) |
| PIC12F683_07 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology |
| PIC12F683-E/MD | 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 6I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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