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參數(shù)資料
| 型號(hào)： | NT7502H-TABF1 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 65 X 132 RAM-Map LCD Controller / Driver |
| 中文描述： | 65 × 132 RAM的地圖LCD控制器/驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 28/54頁 |
| 文件大?。?/td> | 687K |
| 代理商： | NT7502H-TABF1 |
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NT7502
17. V0 Voltage Regulator Internal Resistor Ratio Set
This command sets the V0 voltage regulator internal resistor ratio. For details, see explanation under “The Power Supply
Circuits”.
A0
E
RD
1
W
R
/
WR
0
D7
D6 D5
D4 D3
D2
D1
D0
Rb / Ra Ratio
0
0
0
1
0
0
0
0
0
1
1
0
0
1
:
1
1
0
1
0
0
1
Small
:
Large
18. The Electronic Volume (Double Byte Command)
This command makes it possible to adjust the brightness of the liquid crystal display by controlling the liquid crystal drive
voltage V0 through the output from the voltage regulator circuits of the internal liquid crystal power supply.
This command is a two-byte command used as a pair with the electronic volume mode set command and the electronic
volume register set command, and both commands must be issued one after the other.
!
The Electronic Volume Mode Set
When this command is input, the electronic volume register set command is enabled. Once the electronic volume mode has
been set, no other command except the electronic volume register command can be used. Once the electronic volume
register set command has been used to set data into the register, then the electronic volume mode is released.
A0
E
RD
W
R
/
WR
0
D7
D6
D5
D4
D3
D2
D1
D0
0
1
1
0
0
0
0
0
0
1
!
Electronic Volume Register Set
By using this command to set six bits of data to the electronic volume register, the liquid crystal voltage V
0
assumes one of
the 64 voltage levels.
When this command is input, the electronic volume mode is released after the electronic volume register has been set.
A0
E
RD
1
1
1
1
1
1
W
R
/
WR
0
0
0
0
0
0
D7
D6 D5
D4 D3
D2
D1
D0
V0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
0
0
0
1
1
0
0
0
1
1
0
0
0
:
1
1
0
0
0
1
1
0
1
1
0
0
1
0
1
Small
:
Large
1
1
When the electronic volume function is not used, set D5 - D0 to 100000.
28
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