參數(shù)資料
型號(hào)： MSM80C85AHGS
廠商： OKI SEMICONDUCTOR CO., LTD.
英文描述： 8-Bit CMOS MICROPROCESSOR
中文描述： 8位CMOS微處理器
文件頁(yè)數(shù)： 8/29頁(yè)
文件大?。?/td> 210K
代理商： MSM80C85AHGS
8/29
Semiconductor
MSM80C85AHRS/GS/JS
DRIVING THE X
1
AND X
2
INPUTS
You may drive the clock inputs of the MSM80C85AH with a crystal, or an external clock source.
The driving frequency must be at least 1 MHz, and must be twice the desired internal clock
frequency; hence, the MSM80C85AH is operated with a 6 MHz crystal (for 3 MHz clock). If a
crystal is used, it must have the following characteristics:
Parallel resonance at twice the clock frequency desired
C
L
(load capacitance)
￡
30 pF
C
S
(shunt capacitance)
￡
7 pF
R
S
(equivalent shunt resistance)
￡
75 ohms
Drive level: 10 mW
Frequency tolerance:
±
0.05% (suggested)
Note the use of the capacitors between X
1
, X
2
and ground. These capacitors are required to
assure oscillator startup at the correct frequency.
Figure 4 shows the recommended clock driver circuits. Note in B that a pull-up resistor is
required to assure that the high level voltage of the input is at least 4 V.
For driving frequencies up to and including 6 MHz you may supply the driving signal to X, and
leave X
2
open-circuited (Figure 4B). To prevent self-oscillation of the MSM80C85AH, be sure
that X
2
is not coupled back to X
1
through the driving circuit.
Note:
Since the constant values may vary depending on oscillator, consult the manufacturer
of the oscillator used when designing a circuit.
Figure 4 Clock Driver Circuits
X
1
C
INT
= 15 pF
X
2
C
1
C
2
X
1
X
2
* X
2
Left Floating
V
IH
> 0.8 V
CC
High time > 40 ns
Low time > 40 ns
33 pF Capacitor required for crystal frequency 10 to 6.25 MHz
50 pF Capacitor required for crystal frequency 6.25 to 4 MHz
100 pF Capacitor required for crystal frequency <4 MHz
MSM80C85AH
A. Quartz Crystal Clock Driver
B. 1 - 10 MHz Input Frequency External
Clock Drive Circuit
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相關(guān)PDF資料
PDF描述
MSM80C85AHRS 8-Bit CMOS MICROPROCESSOR
MSM80C85AH 8-Bit CMOS Microprocessor(掉電模式,5個(gè)中斷響應(yīng),數(shù)據(jù)、地址復(fù)用,8位微處理器)
MSM81C55-5GS 2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER
MSM81C55-5JS 2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER
MSM81C55-5RS 2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MSM80C85AHJS 制造商:ROHM Semiconductor 功能描述:
MSM80C85AHRS 制造商:OK International 功能描述: 制造商:ROHM Semiconductor 功能描述:8bit,CMOS MCU 制造商:ROHM Semiconductor 功能描述:8-bit CMOS microcontroller
MSM80C85ARS 制造商:OK International 功能描述: 制造商:Panasonic Industrial Company 功能描述:IC
MSM80C86A-10GS 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:16-Bit CMOS MICROPROCESSOR
MSM80C86A-10JS 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:16-Bit CMOS MICROPROCESSOR
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