參數(shù)資料
型號: ML610Q412P-XXXWA
廠商: LAPIS SEMICONDUCTOR CO LTD
元件分類: 微控制器/微處理器
英文描述: RISC MICROCONTROLLER, UUC95
封裝: 2.83 MM X 2.63 MM, 0.35 MM HEIGHT, 0.80 MM PITCH, DIE-95
文件頁數(shù): 151/152頁
文件大小: 1641K
代理商: ML610Q412P-XXXWA
ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 6
Clock Generation Circuit
6 – 13
6.3.3
Switching of System Clock
The system clock can be switched between high-speed clock (HSCLK) and low-speed clock (LSCLK) by using the
frequency control registers (FCON0, FCON1). This function is not available on ML610Q415.
Figure 6-8 shows a flow of system clock switching processing (HSCLK
→LSCLK) and Figure 6-11 shows a flow of
system clock switching processing (LSCLK
→HSCLK).
Figure 6-8
Flow of System Clock Switching Processing (HSCLK
→LSCLK)
Note:
The function switching HSCLK to LSCLK is not available on ML610Q415.
After the power is turned on or if the system clock is switched from HSCLK to LSCLK immediately following
return from the STOP mode, the CPU becomes inactive until LSCLK starts clock supply to the peripheral circuits.
Therefore, It is recommended to switch to LSCLK after confirming that the LSCLK is oscillating by checking that
the time base counter interrupt request bit (Q128H) is “1”.
System clock switching (High-speed clock
→Low-speed clock)
System clock switching
Low-speed operation mode
Stop of high-speed oscillation
(* do not need to stop the oscillation if the high-speed clock is used
for any peripheral)
SYSCLK
←”0”
ENOSC
←”0”
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