參數(shù)資料
型號： HD66421
廠商： Hitachi,Ltd.
英文描述： (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)
中文描述： （內(nèi)存提供160通道4級灰度的點陣圖形液晶顯示驅(qū)動程序）
文件頁數(shù)： 34/46頁
文件大?。?/td> 201K
代理商： HD66421
Preliminary
Rev. 1.1E '99.02.10
HD66421
Figure 31 Power Supply Circuit
-+
-+
-
+
-
+
V2O
V3O
V4O
V5O
IV1
IV2
IV3
IV4
GREF
R1
R1
R3
R1
R1
VLCD
R2
Contrast
control
circuit
Bias
control
V1O
HD66421
DCON
External voltage
booster
on/off
Vout
-+
IV5
R4
IREFP
IREFM
GND
Vcc
VLCD
Operational
amplifier OFF
resistive divider for
partial display mode
r
r
r
r
R1 = R
R2 = 0.094R to 3R
R3 = 4R to 7R
R4 = 1M
to 5M
C1 = 1μF to 3μF
Resister for
bias current
of operational
amplifier
C1
C1
C1
C1
C1
34
LCD drive levels bias ratio:
LCD driving levels
bias ratio can be selected from 1/8, 1/9, 1/10 or
1/11.
Power Supply:
The HD66421 needs the external
power supply for LCD driving circuit. If this
power circuit has on/off control, the HD66421
controls the external power supply circuit by
setting PWR bit.
External Power Supply Circuit:
When the
internal operational amplifier cannot fully drive
the LCD panel used, V1O to V5O voltages can be
supplied from external power supply circuit.
Here, the AMP bit must be set to 1 to turn off the
internal power supply circuit.
相關PDF資料
PDF描述
HD66421TB0 (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)
HD66503 240-Channel Common Driver with Internal LCD Timing Circuit(帶內(nèi)部LCD定時電路的240通道驅(qū)動器)
HD66520T 160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM(點陣圖形LCD160通道驅(qū)動器)
HD66522 160-Channel Column Driver with Internal Bit-Map RAM for Reflective Color Display and Grayscale Display(點陣圖形LCD160通道驅(qū)動器)
HD66523R 240-Channel Common Driver with Internal LCD Timing Circuit(帶內(nèi)部LCD定時電路的240通道驅(qū)動器)
相關代理商/技術參數(shù)
參數(shù)描述
HD66421TB0 制造商:Renesas Electronics Corporation 功能描述:
HD66503 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66520 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66520T 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66520TA0 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
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