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| 型号： | MSM82C84A-2 |
| 厂商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Clock Generator And Driver(时钟发生器驱动器,输出时钟频率2~8MHz) |
| 中文描述： | 时钟发生器和驱动器（时钟发生器驱动器，输出时钟频率2?8MHz时） |
| 文件页数： | 9/18页 |
| 文件大小： | 166K |
| 代理商： | MSM82C84A-2 |
9/18
Semiconductor
MSM82C84A-2RS/GS/JS
OPERATIONAL DESCRIPTION
(1) Oscillator Circuit
The MSM82C84A-2 internal oscillator circuit can be driven by connecting a crystal oscillator to
the X
1
and X
2
pins.
The frequency of the crystal oscillator in this case needs to be three times greater than the desired
CLK frequency.
Since the oscillator circuit output (the same output as for the crystal resonator frequency)
appears at the OSC pin, independent use of this output is also possible.
Oscillator Circuit Example
C
1
C
2
X
1
X
2
MSM
82C84A-2
OSC
Crystal Oscillator
When input frequency is 6 to 15 MHz
C
1
= C
2
= 33 pF
When input frequency is 15 to 24 MHz
C
1
= C
2
= 10 pF
Note:
Because Oscillator circuit and values depend on crystal oscillator characteristics,
OKI recommends to make contact with crystal oscillator vendor to determine
the best circuit and values for customers' application.
(2) Clock Generator Circuit
This circuit generates two clock outputs-CLK obtained by dividing the input external clock or
crystal oscillator circuit output by three, and PCLK obtained by halving CLK. CLK and PCLK
are generated from the external clock applied to the EFI pin when F/
C
is at high level, and are
generated from the crystal oscillator circuit when at low level.
(3) Reset Circuit
Since a Schmitt trigger circuit is used in the
RES
input, the MSM82C84A-2 can be reset by “power
on” by connection to a simple RC circuit. If the MSM80C86A-10 or MSM80C88A-10 is used as
the CPU in this case, it is necessary to keep the
RES
input at low level for at least 50 ms after Vcc
reaches the 4.5V level.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSM82C84A-2GS | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:CLOCK GENERATOR AND DRIVER |
| MSM82C84A-2JS | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:CLOCK GENERATOR AND DRIVER |
| MSM82C84A-2RS | 制造商:ROHM Semiconductor 功能描述:CLOCK GENERATOR AND DRIVER 制造商:ROHM Semiconductor 功能描述:Clock generator drive |
| MSM82C88-2GS | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:BUS CONTROLLER |
| MSM82C88-2JS | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:BUS CONTROLLER |
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