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參數(shù)資料
| 型號(hào)： | S-4561A |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | LCD Controller-Driver With Built-in Serial and Parallel interfaces(內(nèi)置串行和并行接口的LCD控制器-驅(qū)動(dòng)器) |
| 中文描述： | LCD控制器，內(nèi)置的串行和并行接口（內(nèi)置串行和并行接口的液晶顯示控制器-驅(qū)動(dòng)器驅(qū)動(dòng)程序） |
| 文件頁數(shù)： | 17/49頁 |
| 文件大?。?/td> | 461K |
| 代理商： | S-4561A |
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LCD Controller-Driver
S-4561A
16
Seiko Instruments Inc.
12.3
LCD Bias Resistor
The internally-divided resistor creates a bias potential for the LCD drive. Either 1/5 or 1/4 bias potential can be selected by
executing a command. Because the bias potential is supplied from bias resistor via the voltage follower to the LCD driver,
the bias current consumption is significantly reduced.
When setting FNC1 to
“
H
”
and FNC2 to
“
L,
”
the externally-attached bias resistor can be connected directly to pins V1
through V4. The bias resistor of a 1/2 or more bias ratio can be freely supplied to the LCD driver as an LCD drive voltage.
Regardless of its level, the voltage can be input to pins V1 through V4. Select an appropriate resistance value of the divided
resistor in accordance with the size and the capacity of of the LCD panel. A deflection may occur in the LCD drive waveform
depending upon the size and the capacity of the LCD panel. If so, adjust the value of the bias resistor or the capacitor.
When the external bias is selected, the bias voltage is also supplied via the voltage follower to the LCD driver. The internal
booster or the LCD voltage adjustment circuit cannot be used.
Supply VLCD via the externally-attached LCD power supply circuit.
12.4
Voltage Follower
Buffers the bias potential via the internal bias resistor and supplies it to the LCD driver.
12.5
Reference Voltage Circuit
Generates reference voltage VREF. The VREF has the following three values:
Table 15 V
REF
V
REF
DV1
DV0
Temperature
Characteristics
-0.13%/
°
C
0.01%/
°
C
Reference
Voltage
1.7 V (Standard)
1.7 V (Standard)
V
DD
0
0
1
0
1
*
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