- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370471 > HD66705U (Hitachi,Ltd.) Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver(圖形LCD控制器/驅(qū)動器) PDF資料下載
參數(shù)資料
| 型號： | HD66705U |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver(圖形LCD控制器/驅(qū)動器) |
| 中文描述： | 低功耗點陣液晶顯示控制器/驅(qū)動器（圖形液晶顯示控制器/驅(qū)動器） |
| 文件頁數(shù)： | 54/81頁 |
| 文件大小： | 426K |
| 代理商： | HD66705U |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁當前第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁
HD66705U
54
Contrast Adjuster
Multiplexing Drive System
Contrast for an LCD controlled by the multiplexing drive method can be adjusted by varying the liquid-
crystal drive voltage (potential difference between V
CC
and V5) through the CT bits of the contrast control
instruction (electron volume function). See Figure 35 and Table 20. The value of a variable resistor (VR)
can be adjusted within the range from 0.4R through 6.4R, where R is a reference resistance obtained by
dividing the total resistance between V
CC
and V5.
The
HD66705U
incorporates a voltage-follower operational amplifier for each of V1 to V5 to reduce current
flowing through the internal bleeder-resistors, which generate different levels of liquid-crystal drive
voltages. Thus, potential differences between V
CC
and V1 and between V
EE
and V5 must be 0.4V or greater.
Note that the OPOFF pin must be grounded when using the operational amplifiers.
1/4 bias (V2 and V3 pins short-circuited)
LCD drive voltage VLCD: 4R
×
(V
CC
– V
EE
)/(4R + VR) (VR = a value within the range from 0.4R
to 6.4R)
VLCD adjustable range: 0.385
×
(V
CC
– V
EE
)
≤
VLCD
≤
0.909
×
(V
CC
– V
EE
)
Potential difference between V
CC
and V1: R
×
(V
CC
– V
EE
)/(4R + VR)
≥
0.4 (V)
Potential difference between V5 and V
EE
: VR
×
(V
CC
– V
EE
)/(4R + VR)
≥
0.4 (V)
1/5 bias (V2 and V3 pins open)
LCD drive voltage VLCD: 5R
×
(V
CC
– V
EE
)/(5R + VR) (VR = a value within the range from 0.4R
to 6.4R)
VLCD adjustable range : 0.439
×
(V
CC
– V
EE
)
≤
VLCD
≤
0.926
×
(V
CC
– V
EE
)
Potential difference between V
CC
and V1 : R
×
(V
CC
– V
EE
)/(5R + VR)
≥
0.4(V)
Potential difference between V5 and V
EE
: VR
×
(V
CC
– V
EE
)/(5R + VR)
≥
0.4(V)
Static Drive System
Contrast for a statically-driven LCD, that is, annunciator display, can be adjusted through the AGND pin.
The annunciators are driven statically by the potential difference between V
CC
and AGND. The AGND pin
level must be equal to or greater than the GND level.
相關PDF資料 |
PDF描述 |
|---|---|
| HD66710 | (Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66710A00FS | 16 AMP SPDT MINIATURE POWER RELAY |
| HD66710A00TF | (Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66712U | Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅(qū)動器) |
| HD66712 | Dot-Matrix Liquid Crystal Display Controller/Driver |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD66710 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66710A00FS | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66710A00TF | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66712 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver |
| HD66712A00TA0 | 制造商:Renesas Electronics Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。