參數(shù)資料
型號: HS4339ESS01H
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer with large-capacity memory
中文描述: 4位HMCS400系列的大容量存儲器微機
文件頁數(shù): 28/78頁
文件大小: 337K
代理商: HS4339ESS01H
HD404339 Series
28
Table 4
Oscillator Circuit Examples
Circuit Configuration
Circuit Constants
External clock
operation
External
oscillator
OSC
Open
1
OSC
2
Ceramic oscillator
(OSC
1
, OSC
2
)
OSC
2
C
1
2
C
OSC
1
R
f
Ceramic
GND
Ceramic oscillator: CSA4.00MG
(Murata)
R
f
= 1 M
±
20%
C
1
= C
2
= 30 pF
±
20%
Crystal oscillator
(OSC
1
, OSC
2
)
OSC
2
C
1
2
C
OSC
1
R
f
Crystal
GND
L
S
C
R
S
C
0
OSC
1
OSC
2
R
f
= 1 M
±
20%
C
1
= C
2
= 10 to 22 pF
±
20%
Crystal: Equivalent to circuit shown below
C
0
= 7 pF max.
R
S
= 100
max.
Crystal oscillator
(X1, X2)
X1
C
1
2
C
X2
Crystal
GND
L
S
C
R
S
C
0
X1
X2
Crystal: 32.768 kHz: MX38T (Nippon
Denpa)
C
1
= C
2
= 20 pF
±
20%
R
S
= 14 k
C
0
= 1.5 pF
Notes: 1. Since the circuit constants change depending on the crystal or ceramic oscillator and stray
capacitance of the board, the user should consult with the crystal or ceramic oscillator
manufacturer to determine the circuit parameters.
2. Wiring among OSC
, OSC
, X1, X2 and elements should be as short as possible, and must not
cross other wiring (see figure 19).
3. When a 32.768-kHz crystal oscillator is not used, fix pin X1 to GND and leave pin X2 open.
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