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| 型號(hào)： | PIC24HJ32GP202T-I/SS |
| 廠商： | Microchip Technology |
| 文件頁(yè)數(shù)： | 289/289頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | MCU PIC 16BIT 32K FLASH 28SSOP |
| 標(biāo)準(zhǔn)包裝： | 2,100 |
| 系列： | PIC® 24H |
| 核心處理器： | PIC |
| 芯體尺寸： | 16-位 |
| 速度： | 40 MIP |
| 連通性： | I²C，IrDA，LIN，SPI，UART/USART |
| 外圍設(shè)備： | 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 21 |
| 程序存儲(chǔ)器容量： | 32KB（11K x 24） |
| 程序存儲(chǔ)器類型： | 閃存 |
| RAM 容量： | 2K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 3 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 10x10b/12b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 包裝： | 帶卷 (TR) |
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2007-2011 Microchip Technology Inc.
DS70289J-page 99
PIC24HJ32GP202/204 AND PIC24HJ16GP304
9.0
POWER-SAVING FEATURES
The PIC24HJ32GP202/204 and PIC24HJ16GP304
devices provide the ability to manage power
consumption by selectively managing clocking to the
CPU and the peripherals. In general, a lower clock
frequency and a reduction in the number of circuits
being clocked constitutes lower consumed power.
PIC24HJ32GP202/204
and
PIC24HJ16GP304
devices can manage power consumption in four
different ways:
Clock frequency
Instruction-based Sleep and Idle modes
Software-controlled Doze mode
Selective peripheral control in software
Combinations of the above methods can be used to
selectively
customize
an
application’s
power
consumption while still maintaining critical application
features, such as timing-sensitive communications.
9.1
Clock Frequency and Clock
Switching
PIC24HJ32GP202/204 and PIC24HJ16GP304 devices
allow a wide range of clock frequencies to be selected
under application control. If the system clock
configuration is not locked, users can choose
low-power or high-precision oscillators by simply
changing the NOSC bits (OSCCON<10:8>). The
process of changing a system clock during operation,
as well as limitations to the process, are discussed in
more
detail
in
.
9.2
Instruction-Based Power-Saving
Modes
PIC24HJ32GP202/204 and PIC24HJ16GP304 devices
have two special power-saving modes that are entered
through the execution of a special PWRSAV instruction.
Sleep mode stops clock operation and halts all code
execution. Idle mode halts the CPU and code
execution, but allows peripheral modules to continue
operation. Example 9-1 shows the Assembler syntax of
the PWRSAV instruction.
Sleep and Idle modes can be exited as a result of an
enabled interrupt, WDT time-out or a device Reset. When
the device exits these modes, it is said to wake-up.
9.2.1
SLEEP MODE
In the Sleep mode:
The system clock source is shut down. If an
on-chip oscillator is used, it is turned off.
The device current consumption is reduced to a
minimum, provided that no I/O pin is sourcing
current
The Fail-Safe Clock Monitor does not operate,
since the system clock source is disabled
The LPRC clock continues to run if the WDT is
enabled
The WDT, if enabled, is automatically cleared
prior to entering Sleep mode
Some device features or peripherals may continue
to operate. This includes items such as the input
change notification on the I/O ports, or peripherals
that use an external clock input.
Any peripheral that requires the system clock
source for its operation is disabled
The device will wake-up from Sleep mode on any of
these events:
Any interrupt source that is individually enabled
Any form of device Reset
A WDT time-out
On wake-up from Sleep mode, the processor restarts
with the same clock source that was active when Sleep
mode was entered.
EXAMPLE 9-1:
PWRSAV
INSTRUCTION SYNTAX
Note 1:
This data sheet summarizes the features
of
the
PIC24HJ32GP202/204
and
PIC24HJ16GP304 family of devices.
However, it is not intended to be a com-
prehensive reference source. To comple-
ment the information in this data sheet,
refer to “Section 9. Watchdog Timer
and Power Savings Modes”
(DS70196)
of the “dsPIC33F/PIC24H Family Refer-
ence Manual”
, which is available from the
Microchip website (www.microchip.com).
2:
Some registers and associated bits
described in this section may not be
available on all devices. Refer to
in
this data sheet for device-specific register
and bit information.
Note:
SLEEP_MODE
and
IDLE_MODE
are
constants defined in the assembler
include file for the selected device.
PWRSAV
#SLEEP_MODE
; Put the device into Sleep mode
PWRSAV
#IDLE_MODE
; Put the device into Idle mode
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