参数资料
型号: ST7PLUSA2M3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8
封装: 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8
文件页数: 80/136页
文件大小: 1705K
代理商: ST7PLUSA2M3
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
Power saving modes
ST7LITEUS2, ST7LITEUS5
8
Power saving modes
8.1
Introduction
To give a large measure of flexibility to the application in terms of power consumption, four
main power saving modes are implemented in the ST7 (see Figure 18):
Slow
Wait (and Slow-wait)
Active-halt
Auto-wakeup from Halt (AWUFH)
Halt
After a reset the normal operating mode is selected by default (Run mode). This mode
drives the device (CPU and embedded peripherals) by means of a master clock which is
based on the main oscillator frequency (fOSC).
From Run mode, the different power saving modes may be selected by setting the relevant
register bits or by calling the specific ST7 software instruction whose action depends on the
oscillator status.
Figure 18.
Power saving mode transitions
POWER CONSUMPTION
Wait
Slow
Run
Active halt
High
Low
Slow wait
Halt
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