參數(shù)資料
型號: S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 96/161頁
文件大?。?/td> 1037K
代理商: S1C621A0F0A0100
S1C621A0 TECHNICAL HARDWARE
EPSON
I-15
CHAPTER 3: PERIPHERAL CIRCUITS (Oscillation Circuit)
3.3 Oscillation Circuit
The S1C621A0 contains an OSC1 (32.768 kHz) crystal
oscillation circuit and an OSC3 (455 kHz) ceramic oscillation
circuit*. Either the OSC1 or OSC3 can be selected as the
CPU operation clock by software. Figures 3.3.1 and 3.3.2
show block diagrams of the oscillation circuit.
*
By using the mask option it is possible to connect a CR oscilla-
tion circuit in place of the ceramic oscillation circuit, or it is
possible to forgo the use of the OSC3 circuit.
Fig. 3.3.2
OSC3 Oscillation
Circuit
Fig. 3.3.1
OSC1 Oscillation Circuit
(Crystal)
a) OSC3 – CR oscillation circuit
c) OSC3 – "Not Use"
is selected by
mask option
b) OSC3 – Ceramic oscillation circuit
VDD
CGX
CDX
OSC2
OSC1
VDD
Rfx
RDX
OSC1
X'tal
OSC4
OSC3
OSCC
RCR
CRC
VDD
C GC
CDC
OSC4
OSC3
OSCC
RDC
Rfc
Ceramic
OSC4
OSC3
VS1
VDD
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