- 您现在的位置：买卖IC网 > Sheet目录317 > C8051T610DB24 (Silicon Laboratories Inc)DAUGHTER BOARD T610 24QFN SOCKET
C8051T610/1/2/3/4/5/6/7
18. Power Management Modes
The C8051T610/1/2/3/4/5/6/7 devices have two software programmable power management modes: idle,
and stop. Idle mode halts the CPU while leaving the peripherals and clocks active. In stop mode, the CPU
is halted, all interrupts and timers (except the missing clock detector) are inactive, and the internal oscilla-
tor is stopped (analog peripherals remain in their selected states; the external oscillator is not affected).
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 because the majority of the device is shut down with no clocks active. SFR Definition 18.1 describes
the Power Control Register (PCON) used to control the C8051T610/1/2/3/4/5/6/7's stop and idle power
management modes.
Although the C8051T610/1/2/3/4/5/6/7 has idle and stop modes available, more control over the device
power can be achieved by enabling/disabling individual peripherals as needed. Each analog peripheral
can be disabled when not in use and placed in low power mode. Digital peripherals, such as timers or
serial buses, draw little power when they are not in use.
18.1. Idle Mode
Setting the Idle Mode Select bit (PCON.0) causes the hardware to halt the CPU and enter idle mode as
soon as the instruction that sets the bit completes execution. 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 is asserted or a reset occurs. The assertion of an
enabled interrupt will cause the Idle Mode Selection bit (PCON.0) to be cleared and the CPU to 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 the instruction following the write of the IDLE bit is a single-byte instruction and an interrupt occurs during
the execution phase of the instruction that sets the IDLE bit, the CPU may not wake from idle mode when
a future interrupt occurs. Therefore, instructions that set the IDLE bit should be followed by an instruction
that has two or more opcode bytes, for example:
// in ‘C’:
PCON |= 0x01;
PCON = PCON;
; in assembly:
ORL PCON, #01h
MOV PCON, PCON
// set IDLE bit
// ... followed by a 3-cycle dummy instruction
; set IDLE bit
; ... followed by a 3-cycle dummy instruction
If enabled, the watchdog timer (WDT) will eventually cause an internal watchdog reset and thereby termi-
nate 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 pro-
vides the opportunity for additional power savings, allowing the system to remain in the idle mode indefi-
nitely, waiting for an external stimulus to wake up the system. Refer to Section “19.6. PCA Watchdog Timer
Rev 1.1
97
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
C8051T630DB20
BOARD SOCKET DAUGHTER 20-QFN
CAN-100
BOARD EVAL RS232 100QFP
CANADAPT28
KIT ADAPTER CANDEMOBOARD 28PLCC
CAT24AA01WI-GT3
IC EEPROM SERIAL 1KB I2C 8SOIC
CAT24AA02WI-G
IC EEPROM SERIAL 2KB I2C 8SOIC
CAT24C01ZI-G
IC EEPROM SERIAL 1KB I2C 8MSOP
CAT24C03WI-G
IC EEPROM SERIAL 2KB I2C 8SOIC
CAT24C04ZI-G
IC EEPROM SERIAL 4KB I2C 8MSOP
相关代理商/技术参数
C8051T610DB28
功能描述:子卡和OEM板 C8051T610 Family Socket Daughtr Board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
C8051T610DB32
功能描述:子卡和OEM板 C8051T610 Family Socket Daughtr Board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
C8051T610DK
功能描述:开发板和工具包 - 8051 C8051T610 Series Development Kit RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压:
C8051T610-GQ
功能描述:8位微控制器 -MCU 16KB 10ADC 32Pin MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
C8051T610-GQR
功能描述:8位微控制器 -MCU 16KB 10ADC 32Pin MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
C8051T611-GM
功能描述:8位微控制器 -MCU 16KB 10ADC 28Pin MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
C8051T611-GMR
功能描述:8位微控制器 -MCU 16KB 10ADC 28Pin MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
C8051T612-GQ
功能描述:8位微控制器 -MCU 8KB 10ADC 32Pin MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT