參數(shù)資料
型號: HD404394S
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微電腦(4位單片微計算機)
文件頁數(shù): 40/100頁
文件大?。?/td> 610K
代理商: HD404394S
HD404344R Series/HD404394 Series
40
Table 16
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
oscillator
GND
Ceramic oscillator : CSA4.00MG (Murata)
R
f
= 1 M
±
20%
C
1
= C
2
= 30 pF
±
20%
Ceramic oscillator: KBR-4.0MSA (Kyocera)
R
f
= 1 M
±
20%
C
1
= C
2
= 33 pF
±
20%
CR oscillation
(OSC
, OSC
)
HD404344R series
OSC
2
OSC
1
R
f
R
f
= 20 k
±
1%
Notes: 1. Since the circuit constants change depending on the ceramic oscillator and stray capacitance of
the board, the user should consult with the ceramic oscillator manufacturer to determine the
circuit parameters.
2. Wiring among OSC
, OSC
2
, and elements should be as short as possible, and must not cross
other wiring (see figure 18).
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