参数资料
型号: ST7PLITEUS5M6TR
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO8
封装: 0.150 INCH, LEAD FREE, PLASTIC, SOP-8
文件页数: 19/108页
文件大小: 1957K
代理商: ST7PLITEUS5M6TR
ST7LITEUSx
18/108
SUPPLY, RESET AND CLOCK MANAGEMENT (Cont’d)
– 2. Using a 4-bit counter, wait until 8 internal RC
cycles have elapsed. The counter is running on
internal RC clock.
– 3. Wait till the AWU_FLAG is cleared (1AWU RC
cycle) and the RC_FLAG is set (2 RC cycles)
– 4. The switch to the internal RC clock is made at
the positive edge of the internal RC clock signal
– 5. Once the switch is made, the AWU RC is
stopped
Notes:
1. When the internal RC is not selected, it is
stopped so as to save power consumption.
2. When the internal RC is selected, the AWU RC
is turned on by hardware when entering Auto
Wake-Up from Halt mode.
3. When the external clock is selected, the AWU
RC oscillator is always on.
Figure 9. Clock Switching
Internal RC
AWU RC
Set RC/AWU
Poll AWU_FLAG until set
Internal RC
Reset RC/AWU
Poll RC_FLAG until set
AWU RC
1
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