參數(shù)資料
型號(hào)： C8051F011
廠商： Cygnal Technologies
英文描述： 20 MIPS,32k Flash,256 Ram,10bit ADC,48 Pin MCU(20 MIPS,32k 閃速存儲(chǔ)器,256 Ram,10位 ADC,48 腳 MCU)
中文描述： 20 MIPS的，32K閃存，256羊，10位ADC，48引腳微控制器（20 MIPS的，32K的閃速存儲(chǔ)器，256，羊，10位ADC和48腳微控制器）
文件頁數(shù)： 84/170頁
文件大?。?/td> 1294K
代理商： C8051F011
Page 84
CYGNAL Integrated Products, Inc.
2001
4.2001; Rev. 1.3
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
PRELIMINARY
10.5.
The CIP-51 core has two software programmable power management modes: Idle and Stop. Idle mode halts the
CPU while leaving the external peripherals and internal clocks active. In Stop mode, the CPU is halted, all interrupts
and timers (except the Missing Clock Detector) are inactive, and the system clock is stopped. Since clocks are
running in Idle mode, power consumption is dependent upon the system clock frequency and the number of
peripherals left in active mode before entering Idle. Stop mode consumes the least power. Figure 10.15 describes
the Power Control Register (PCON) used to control the CIP-51’s power management modes.
Although the CIP-51 has Idle and Stop modes built in (as with any standard 8051 architecture), power management
of the entire MCU is better accomplished by enabling/disabling individual peripherals as needed. Each analog
peripheral can be disabled when not in use and put into low power mode. Digital peripherals, such as timers or serial
buses, draw little power whenever they are not in use. Turning off the oscillator saves even more power, but requires
a reset to restart the MCU.
10.5.1. Idle Mode
Setting the Idle Mode Select bit (PCON.0) causes the CIP-51 to halt the CPU and enter Idle mode as soon as the
instruction that sets the bit completes. All internal registers and memory maintain their original data. All analog
and digital peripherals can remain active during Idle mode.
Idle mode is terminated when an enabled interrupt or /RST is asserted. The assertion of an enabled interrupt will
cause the Idle Mode Selection bit (PCON.0) to be cleared and the CPU will resume operation. The pending interrupt
will be serviced and the next instruction to be executed after the return from interrupt (RETI) will be the instruction
immediately following the one that set the Idle Mode Select bit. If Idle mode is terminated by an internal or external
reset, the CIP-51 performs a normal reset sequence and begins program execution at address 0x0000.
If enabled, the WDT will eventually cause an internal watchdog reset and thereby terminate the Idle mode. This
feature protects the system from an unintended permanent shutdown in the event of an inadvertent write to the PCON
register. If this behavior is not desired, the WDT may be disabled by software prior to entering the Idle mode if the
WDT was initially configured to allow this operation. This provides the opportunity for additional power savings,
allowing the system to remain in the Idle mode indefinitely, waiting for an external stimulus to wake up the system.
Refer to Section 13.8 Watchdog Timer for more information on the use and configuration of the WDT.
10.5.2. Stop Mode
Setting the Stop Mode Select bit (PCON.1) causes the CIP-51 to enter Stop mode as soon as the instruction that sets
the bit completes. In Stop mode, the CPU and oscillators are stopped, effectively shutting down all digital
peripherals. Each analog peripheral must be shut down individually prior to entering Stop Mode. Stop mode can
only be terminated by an internal or external reset. On reset, the CIP-51 performs the normal reset sequence and
begins program execution at address 0x0000.
If enabled, the Missing Clock Detector will cause an internal reset and thereby terminate the Stop mode. The
Missing Clock Detector should be disabled if the CPU is to be put to sleep for longer than the MCD timeout of
100usec.
Power Management Modes
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
C8051F011-GQ 功能描述:8位微控制器 -MCU 32KB 10ADC 48P MCU 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
C8051F011-GQR 功能描述:8位微控制器 -MCU 32KB 10ADC 48Pin MCU Tape and Reel 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
C8051F011R 功能描述:8位微控制器 -MCU C 10Bit 48Pin 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
C8051F012 功能描述:8位微控制器 -MCU 32KB 10ADC 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
C8051F012/005 制造商:Silicon Laboratories Inc 功能描述:
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