參數(shù)資料
型號: S1C63567F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP144
封裝: PLASTIC, QFP-144
文件頁數(shù): 104/172頁
文件大?。?/td> 1349K
代理商: S1C63567F0A0100
S1C63567 TECHNICAL MANUAL
EPSON
27
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
CLKCHG: CPU system clock switching register (FF00HD3)
The CPU's operation clock is selected with this register.
When "1" is written: OSC3 clock is selected
When "0" is written: OSC1 clock is selected
Reading: Valid
When the CPU clock is to be OSC3, set CLKCHG to "1"; for OSC1, set CLKCHG to "0".
After turning the OSC3 oscillation ON (OSCC = "1"), switching of the clock should be done after waiting
5 msec or more.
At initial reset, this register is set to "0".
4.3.7 Programming notes
(1) 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.
(2) 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.
(3) The internal operating voltage of VD1 is fixed at 2.1 V. So it is not necessary to control the operating
voltage regardless of the operating clock selected.
相關(guān)PDF資料
PDF描述
S1C63653F 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, CQFP100
S1C6F567D0A0100 MICROCONTROLLER, UUC141
S1C6N3B0D0A0100 MICROCONTROLLER, UUC54
S1C6P366D0A0100 4-BIT, FLASH, 4.1 MHz, MICROCONTROLLER, UUC102
S1C6P466D0A0A00 MICROCONTROLLER, UUC140
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S1C63616 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer
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
S1C63656 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer
S1C63657 制造商:EPSON 制造商全稱:EPSON 功能描述:CMOS 4-bit Single Chip Microcontroller