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參數(shù)資料
| 型號： | S1C63455D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, UUC105 |
| 封裝： | DIE-105 |
| 文件頁數(shù)： | 48/119頁 |
| 文件大?。?/td> | 865K |
| 代理商： | S1C63455D |
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26
EPSON
S1C63455 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. However, when the CR oscillation circuit has been selected as the OSC1 oscillation circuit, it
is not necessary to set VD1.
(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) When the CR oscillation circuit has been selected as the OSC1 oscillation circuit by mask option, it is
not necessary to switch the operating voltage VD1 using the VDC register and the VD1 voltage is fixed
at 2.2 V. The VD1 level does not change even if any data is written to the VDC register.
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| S1C63557D04Q000 | 制造商:Seiko Instruments Inc (SII) 功能描述:EPSON MCU 4BIT |
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| S1C63632 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
| S1C63653 | 制造商:EPSON 制造商全稱:EPSON 功能描述:CMOS 4-bit Single Chip Microcontroller |
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