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| 型號： | MSM6636GS-VK |
| 廠商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 1 CHANNEL(S), 41.6K bps, LOCAL AREA NETWORK CONTROLLER, PDSO24 |
| 封裝： | 0.430 INCH, 1.27 PITCH, PLASTIC, SOP-24 |
| 文件頁數(shù)： | 30/70頁 |
| 文件大?。?/td> | 1115K |
| 代理商： | MSM6636GS-VK |
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MSM6636/6636B User’s Manual
CPU Interfaces
4 – 9
[WRITE PROCEDURE 1]
1.
Apply a “L” level to the
CS pin to enable parallel interface.
2.
Apply a “H” level to the ALE pin.
3.
Set address values to the AD0 to AD7 pins.
4.
Apply a “L” level to the ALE pin. (Set up the addresses at the fall of ALE.)
5.
Apply a “L” level to the
WR pin.
6.
Input date to the AD0 to AD7 pins.
7.
Apply a “H” level to the
WR pin to write data. (Data writing ends at the rise of WR.)
8.
Apply a “H” level to the
CS pin to terminate the use of parallel interface.
+5
AD0-7
Address
Data
ALE
94
Figure 4.1 Write Timing
[READ PROCEDURE 1]
1.
Apply a “L” level to the
CS pin to enable parallel interface.
2.
Apply a “H” level to the ALE pin.
3.
Set address values to the AD0 to AD7 pins.
4.
Apply a “L” level to the ALE pin. (Set up the addresses at the fall of ALE.)
5.
Apply a “L” level to the
RD pin to read data. (Data reading starts at the fall of RD.)
6.
Apply a “H” level to the
RD pin to end reading. (Data reading ends at the rise of RD.)
7.
Apply a “H” level to the
CS pin to terminate the use of parallel interface.
+5
AD0-7
Address
Data
ALE
4,
Figure 4.2 Read Timing
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