參數(shù)資料
型號(hào): MC68HC711E20MFU2
廠商: MOTOROLA INC
元件分類(lèi): 微控制器/微處理器
英文描述: Microcontrollers
中文描述: 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP64
封裝: QFP-64
文件頁(yè)數(shù): 107/268頁(yè)
文件大小: 3696K
代理商: MC68HC711E20MFU2
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Resets and Interrupts
Low-Power Operation
M68HC11E Family — Rev. 5
Data Sheet
MOTOROLA
Resets and Interrupts
107
5.6 Low-Power Operation
Both stop mode and wait mode suspend CPU operation until a reset or interrupt
occurs. Wait mode suspends processing and reduces power consumption to an
intermediate level. Stop mode turns off all on-chip clocks and reduces power
consumption to an absolute minimum while retaining the contents of the entire
RAM array.
5.6.1 Wait Mode
The WAI opcode places the MCU in wait mode, during which the CPU registers are
stacked and CPU processing is suspended until a qualified interrupt is detected.
The interrupt can be an external IRQ, an XIRQ, or any of the internally generated
interrupts, such as the timer or serial interrupts. The on-chip crystal oscillator
remains active throughout the wait standby period.
The reduction of power in the wait condition depends on how many internal clock
signals driving on-chip peripheral functions can be shut down. The CPU is always
shut down during wait. While in the wait state, the address/data bus repeatedly
runs read cycles to the address where the CCR contents were stacked. The MCU
leaves the wait state when it senses any interrupt that has not been masked.
The free-running timer system is shut down only if the I bit is set to 1 and the COP
system is disabled by NOCOP being set to 1. Several other systems also can be
in a reduced power-consumption state depending on the state of
software-controlled configuration control bits. Power consumption by the
analog-to-digital (A/D) converter is not affected significantly by the wait condition.
However, the A/D converter current can be eliminated by writing the ADPU bit to 0.
The SPI system is enabled or disabled by the SPE control bit. The SCI transmitter
is enabled or disabled by the TE bit, and the SCI receiver is enabled or disabled by
the RE bit. Therefore, the power consumption in wait is dependent on the particular
application.
5.6.2 Stop Mode
Executing the STOP instruction while the S bit in the CCR is equal to 0 places the
MCU in stop mode. If the S bit is not 0, the stop opcode is treated as a no-op (NOP).
Stop mode offers minimum power consumption because all clocks, including the
crystal oscillator, are stopped while in this mode. To exit stop and resume normal
processing, a logic low level must be applied to one of the external interrupts (IRQ
or XIRQ) or to the RESET pin. A pending edge-triggered IRQ can also bring the
CPU out of stop.
Because all clocks are stopped in this mode, all internal peripheral functions also
stop. The data in the internal RAM is retained as long as V
DD
power is maintained.
The CPU state and I/O pin levels are static and are unchanged by stop. Therefore,
when an interrupt comes to restart the system, the MCU resumes processing as if
there were no interruption. If reset is used to restart the system, a normal reset
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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.
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MC68HC711E9CFN2 功能描述:IC MCU 12K 2MHZ OTP 52-PLCC RoHS:否 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C,IrDA,LIN,SPI,UART/USART 外圍設(shè)備:DMA,PDR,POR,PVD,PWM,溫度傳感器,WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB(64K x 8) 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN,36-VFQFPN 包裝:托盤(pán) 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱(chēng):497-9032STM32F101T8U6-ND
MC68HC711E9CFN3 功能描述:IC MCU 3MHZ 12K OTP 52-PLCC RoHS:否 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C,IrDA,LIN,SPI,UART/USART 外圍設(shè)備:DMA,PDR,POR,PVD,PWM,溫度傳感器,WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB(64K x 8) 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN,36-VFQFPN 包裝:托盤(pán) 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱(chēng):497-9032STM32F101T8U6-ND