參數(shù)資料
型號: S1C63406D0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, UUC103
封裝: DIE-103
文件頁數(shù): 84/151頁
文件大小: 1171K
代理商: S1C63406D0A0100
30
EPSON
S1C63406/408 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
4.3.7 Programming notes
(1) When switching the CPU system clock from OSC1 to OSC3, first set VD1. After that maintain 2.5 msec
or more, and then turn the OSC3 oscillation ON.
When switching from OSC3 to OSC1, set VD1 after switching to OSC1 and turning the OSC3 oscilla-
tion OFF.
(2) It takes at least 5 msec from the time the OSC3 oscillation circuit goes ON until the oscillation stabi-
lizes. Consequently, when switching the CPU operation clock from OSC1 to OSC3, do this after a
minimum of 5 msec have elapsed since the OSC3 oscillation went ON.
Further, the oscillation stabilization time varies depending on the external oscillator characteristics
and conditions of use, so allow ample margin when setting the wait time.
(3) When switching the clock form OSC3 to OSC1, use a separate instruction for switching the OSC3
oscillation OFF. An error in the CPU operation can result if this processing is performed at the same
time by the one instruction.
(4) The S1C63406/408 supports the SLEEP function. The OSC3 oscillation circuit stops in the SLEEP
mode. The OSC1 oscillation circuit stops clock supply to the divider and peripheral circuits, however,
the oscillation continues. To prevent improper operation after the CPU wakes up, be sure to run the
CPU with the OSC1 clock before setting the CPU in the SLEEP mode.
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