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參數(shù)資料
| 型號： | S-4544A |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | LCD Controller-Driver With Built-in 8-Bit and Serial Interfaces(內(nèi)置8位和串行接口的LCD控制器-驅(qū)動器) |
| 中文描述： | LCD控制器與- 8內(nèi)置驅(qū)動器位和串行接口（內(nèi)置8位和串行接口的液晶顯示控制器-驅(qū)動器） |
| 文件頁數(shù)： | 25/39頁 |
| 文件大?。?/td> | 237K |
| 代理商： | S-4544A |
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LCD Controller-Driver
S-4544A
24
Seiko Instruments Inc.
12. Read Modify Write
The Read Modify Write command is valid when partly altering or rewriting the display data RAM, for example the
cursor indication, the blinking indication, etc. After inputting the Read Modify Write command, column address of the
display data RAM is incremented only when inputting the display data write command. In Read data command, it is
possible to rewrite the display data of the column address which is read, without increment of the column address.
Furthermore, when reading and writing of the display data is successively executed, the successive address of the
display data RAM is rewritten within the same page. A dummy read is needed when reading the display data.
The Read Modify Write command is valid until the End command is input. When inputting the End command, the
column address returns to the address before the Read modify command was input.
During the Read Modify Write command operation, all commands are usable except the Column address set
command.
13. End
This command cancels Read Modify Write. The column address of the display data RAM returns to the address
before Read Modify Write is executed.
Note: When executing the End command during normal operation, the state returns to the column address before
the Column Address command is executed.
A0
RDX
R/WX
D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
1
1
1
0
0
0
0
0
A0
RDX
R/WX
D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
1
1
1
0
1
1
1
0
Column Address Set
Read Modify Write
Data Read
Data Write
Rewrite End
End Command
Rewrite Again
NO
End
NO
YES
YES
Returns to the address before executing
the Read Modify Write command.
Figure 9 Command Sequence for Cursor Display
Page Address Set
Dummy Read
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