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參數(shù)資料
| 型號： | PIC10F202T-I/PG |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 4 MHz, RISC MICROCONTROLLER, PDIP8 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, MS-001, DIP-8 |
| 文件頁數(shù)： | 47/88頁 |
| 文件大小： | 1127K |
| 代理商： | PIC10F202T-I/PG |
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2004 Microchip Technology Inc.
Preliminary
DS41239A-page 49
PIC10F200/202/204/206
FIGURE 9-9:
BROWN-OUT
PROTECTION CIRCUIT 3
9.9
Power-down Mode (Sleep)
A device may be powered down (Sleep) and later
powered up (wake-up from Sleep).
9.9.1
SLEEP
The Power-down mode is entered by executing a
SLEEP
instruction.
If enabled, the Watchdog Timer will be cleared but
keeps running, the TO bit (Status<4>) is set, the PD bit
(Status<3>) is cleared and the oscillator driver is turned
off. The I/O ports maintain the status they had before
the SLEEP instruction was executed (driving high,
driving low or high-impedance).
For lowest current consumption while powered down,
the T0CKI input should be at VDD or VSS and the GP3/
MCLR/VPP pin must be at a logic high level if MCLR is
enabled.
9.9.2
WAKE-UP FROM SLEEP
The device can wake-up from Sleep through one of
the following events:
1.
An external Reset input on GP3/MCLR/VPP pin,
when configured as MCLR.
2.
A Watchdog Timer time-out Reset (if WDT was
enabled).
3.
A change on input pin GP0, GP1 or GP3 when
wake-up on change is enabled.
4.
A comparator output change has occurred when
wake-up on comparator change is enabled.
These events cause a device Reset. The TO, PD
GPWUF and CWUF bits can be used to determine the
cause of device Reset. The TO bit is cleared if a WDT
time-out occurred (and caused wake-up). The PD bit,
which is set on power-up, is cleared when SLEEP is
invoked. The GPWUF bit indicates a change in state
while in Sleep at pins GP0, GP1 or GP3 (since the last
file or bit operation on GP port). The CWUF bit
indicates a change in the state while in Sleep of the
comparator output.
Note:
A Reset generated by a WDT time-out
does not drive the MCLR pin low.
Note:
This Brown-out Protection circuit employs
Microchip Technology’s MCP809 micro-
controller supervisor. There are 7 different
trip point selections to accommodate 5V to
3V systems.
MCLR
PIC10F20X
VDD
VSS
RST
MCP809
VDD
Bypass
Capacitor
Note:
Caution: Right before entering Sleep,
read the input pins. When in Sleep, wake-
up occurs when the values at the pins
change from the state they were in at the
last reading. If a wake-up on change
occurs and the pins are not read before re-
entering Sleep, a wake-up will occur
immediately even if no pins change while
in Sleep mode.
Note:
The WDT is cleared when the device
wakes from Sleep, regardless of the wake-
up source.
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