參數(shù)資料
型號： M37641M8-XXXFP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁數(shù)： 70/149頁
文件大小： 1997K
代理商： M37641M8-XXXFP
70
7641 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
CLOCK GENERATING CIRCUIT
The 7641 group has two built-in oscillation circuits. An oscillation
circuit can be formed by connecting a resonator between X
IN
and
X
OUT
(X
CIN
and X
COUT
). Use the circuit constants in accordance
with the resonator manufacturer’s recommended values. No exter-
nal resistor is needed between X
IN
and X
OUT
since a feed-back
resistor exists on-chip. However, an external feed-back resistor is
needed between X
CIN
and X
COUT
.
When using an external clock, input the clocks to the X
IN
or X
CIN
pin and leave the X
OUT
or X
COUT
pin open.
Immediately after power on, only the X
IN
oscillation circuit starts
oscillating, and X
CIN
and X
COUT
pins function as I/O ports.
Frequency Control
The internal system clock can be selected among f
SYN
, f(X
IN
),
f(X
IN
)/2, and f(X
CIN
). The internal clock
φ
is half the frequency of
internal system clock.
(1) f
SYN
clock
This is made by the frequency synthesizer. f(X
IN
) or f(X
CIN
) can be
selected as its input clock. See also section “FREQUENCY SYN-
THESIZER”.
(2) f(X
IN
) clock
The frequency of internal system clock is the frequency of X
IN
pin.
(3) f(X
IN
)/2 clock
The frequency of internal system clock is half the frequency of X
IN
pin.
(4) f(X
CIN
) clock
The frequency of internal system clock is the frequency of X
CIN
pin.
I
Note
If you switch the oscillation between X
IN
- X
OUT
and X
CIN
- X
COUT
,
stabilize both X
IN
and X
CIN
oscillations. The sufficient time is re-
quired for the X
CIN
oscillation to stabilize, especially immediately
after power on and at returning from the stop mode.
Fig. 64 Ceramic resonator or quartz-crystal oscillator exter-
nal circuit
Fig. 65 External clock input circuit
X
CIN
X
COUT
X
IN
X
OUT
C
IN
C
OUT
C
CIN
C
COUT
Rf
Rd
V
CC
V
SS
X
CIN
X
COUT
X
IN
X
OUT
Open
Open
External oscillation
circuit
External oscillation
circuit
V
CC
V
SS
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37641M8-XXXHP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M376420RS 制造商:OKI 功能描述:3764-20 NOTES
M3764-20RS 制造商:OKI 功能描述:3764-20 NOTES 制造商: 功能描述:Dynamic RAM, Page Mode, 64K x 1, 16 Pin, Plastic, DIP 制造商:OK International 功能描述:Dynamic RAM, Page Mode, 64K x 1, 16 Pin, Plastic, DIP
M3-7643A-S 制造商:Harris Corporation 功能描述:
M37643F8E8-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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