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參數(shù)資料
| 型號： | HT1647(100QFP)A |
| 英文描述： | Controller Miscellaneous - Datasheet Reference |
| 中文描述： | 控制器雜項(xiàng)-數(shù)據(jù)表參考 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大?。?/td> | 201K |
| 代理商： | HT1647(100QFP)A |
HT1647
Rev. 1.00
14
June 1, 2001
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Internal resistor type bias generator configurations
The following are the data mode ID and the
command mode ID:
Operation
Mode
ID
READ
Data
110
WRITE
Data
101
READ-MODIFY-WRITE
Data
101
COMMAND
Command
100
If successive commands have been issued, the
command mode ID can be omitted. While the
system is operating in the non-successive com-
mand or the non-successive address data mode,
the CS pin should be set to 1 and the previous
operation mode will also be reset. The CS pin
returns to
0 , so a new operation mode ID
should be issued first.
Bias generator
The HT1647 bias voltage belongs to internal re-
sistor type. It provides two kinds of bias option
named 1/5 bias and 1/4 bias respectively. It is
recommended to select 1/5 bias to fit TN-type,
STN-type LCDs and select 1/4 bias to fit
ECB-type LCDs. It also provides three kinds of
bias current option by programming to suitably
drive an LCD panel. The three kinds of bias
current are large, middle, and small, respec-
tively. Usually, large panel LCD can be excel-
lently displayed by large bias current.
Relatively, it consumes large current when
LCD ON command is used. Small bias current
provides low power consumption during On
condition when the LCD is normally displayed.
The following are the reference value table.
VLCD
Bias
Large bias current
Middle bias current
Small bias current
4V
1/5
300 A
100 A
40 A
4V
1/4
375 A
125 A
50 A
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