參數資料
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: 42/119頁
文件大?。?/td> 865K
代理商: S1C63455D
S1C63455 TECHNICAL MANUAL
EPSON
21
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
4.3 Oscillation Circuit
4.3.1 Configuration of oscillation circuit
The S1C63455 has two oscillation circuits (OSC1 and OSC3). OSC1 is either a crystal or a CR oscillation
circuit that supplies the operating clock to the CPU and peripheral circuits. OSC3 is either a CR or a
ceramic oscillation circuit. When processing with the S1C63455 requires high-speed operation, the CPU
operating clock can be switched from OSC1 to OSC3 by the software. To stabilize operation of the internal
circuits, the operating voltage VD1 must be switched according to the oscillation circuit to be used. Figure
4.3.1.1 is the block diagram of this oscillation system.
Oscillation circuit control signal
CPU clock selection signal
To CPU
To peripheral circuits
Clock
switch
Oscillation system
voltage regulator
OSC3
oscillation circuit
OSC1
oscillation circuit
Operating voltage selection signal
VD1
Divider
Fig. 4.3.1.1 Oscillation system block diagram
相關PDF資料
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