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參數資料
| 型號： | HM17CM256 |
| 廠商： | HYNIX SEMICONDUCTOR INC |
| 元件分類： | 顯示驅動器 |
| 英文描述： | 128XRGBX82 OUTPUT LCD DRIVER IC with built-in RAM |
| 中文描述： | LIQUID CRYSTAL DISPLAY DRIVER, UUC580 |
| 封裝： | 19.75 X 2.39 MM, GOLD BUMP, DIE-580 |
| 文件頁數： | 45/111頁 |
| 文件大小： | 2094K |
| 代理商： | HM17CM256 |
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HM17CM256
- 45 -
(31) SUPPLYING POWER AND ON/OFF SEQUENCE
Special care should be taken to the next notice. Supplying the power at LCD driving voltage
terminal when the logic VDD is floating can cause over-current and damage the IC
(31-1) WHEN USING EXTERNAL POWER SUPPLY
power ON sequence
Reset the IC after supplying the logic power at V
DD
terminal, and then turn on the LCD driving
voltage at the terminals (V
LCD
, V
1
, V
2
, V
3
, V
4
).
And when internal voltage converter is used, reset the IC after supplying the logic power at
V
DD
terminal, and then supply power to V
LCD
terminal.
power OFF sequence
Execute HALT command or reset the IC to turn off the outputs of LCD driving output port, and
then turn off the LCD driving voltage after logic power OFF.
Inserting series resistor of 50 ~100
or fuse at V
LCD
or V
OUT
terminal (when only internal
voltage converting circuit is used) is recommended to prevent over-current.
This series resistor should be selected carefully because image quality can be dependent on.
(31-2) WHEN USING BUILT-IN POWER SUPPLY CIRCUIT
power ON sequence
Reset the IC after supplying the logic power at V
DD
terminal or after supplying power through
voltage common port (V
EE
) of boosting voltage generation and then operate internal power
circuit by command.
And when internal voltage converter is used, reset the IC after supplying the logic power at
V
DD
terminal, and then supply power to V
LCD
terminal.
You should turn on the display after the output level of internal power module is set.
If you do not keep this sequence, LCD can display wrong data.
power OFF sequence
To make off state of LCD driving output, cut the source to voltage common port (V
EE
) of
boosting voltage generation, the logic power at V
DD
terminal after reset the IC by HALT
command.
If V
EE
, and V
DD
are supplied from different power source, V
EE
terminal should be turned on/off
during V
DD
terminal voltage maintain voltage level specified in specification sheet.
Specially, when turn off the power, after cut the source to voltage common port (V
EE
), and then
turn off the logic power at V
DD
terminal after the voltage levels of V
EE
, V
OUT
, V
LCD
, V
1
~V
4
become
under LCD on voltage(LCD threshold voltage)level.
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相關代理商/技術參數 |
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|---|---|
| HM17CM4096 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:128XRGBX162 OUTPUT LCD DRIVER IC with built-in RAM |
| HM18 | 制造商:BITECH 制造商全稱:Bi technologies 功能描述:Common-Mode Chokes |
| HM180K | 制造商:Ohmite Mfg Co 功能描述: |
| HM18-10001 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EE Style Common-Mode Chokes |
| HM18-10002 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EE Style Common-Mode Chokes |
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