HM17CM4096 ETC2 [List of Unclassifed Manufacturers], HM17CM4096 Datasheet - Page 45

• Manufacturer Part Number: HM17CM4096
• Description: 128XRGBX162 OUTPUT LCD DRIVER IC with built-in RAM
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

(28) SUPPLYING POWER AND ON/OFF SEQUENCE
terminal when the logic VDD is floating can cause over-current and damage the IC
(28-1)
(28-2)
Special care should be taken to the next notice. Supplying the power at LCD driving voltage
voltage at the terminals (V
terminal, and then supply power to V
then turn off the LCD driving voltage after logic power OFF.
voltage converting circuit is used) is recommended to prevent over-current.
voltage common port (V
circuit by command.
terminal, and then supply power to V
boosting voltage generation, the logic power at V
command.
during V
turn off the logic power at V
under LCD on voltage(LCD threshold voltage)level.
power ON sequence
power OFF sequence
power ON sequence
power OFF sequence
Reset the IC after supplying the logic power at V
And when internal voltage converter is used, reset the IC after supplying the logic power at V
Execute HALT command or reset the IC to turn off the outputs of LCD driving output port, and
Inserting series resistor of 50 ~100
This series resistor should be selected carefully because image quality can be dependent on.
Reset the IC after supplying the logic power at V
And when internal voltage converter is used, reset the IC after supplying the logic power at V
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.
To make off state of LCD driving output, cut the source to voltage common port (V
If V
Specially, when turn off the power, after cut the source to voltage common port (V
EE
, and V
DD
WHEN USING EXTERNAL POWER SUPPLY
WHEN USING BUILT-IN POWER SUPPLY CIRCUIT
terminal voltage maintain voltage level specified in specification sheet.
DD
are supplied from different power source, V
EE
LCD
) of boosting voltage generation and then operate internal power
DD
, V
terminal after the voltage levels of V
1
, V
2
, V
LCD
LCD
3
, V
terminal.
terminal.
or fuse at V
4
).
DD
DD
terminal, and then turn on the LCD driving
DD
terminal or after supplying power through
LCD
terminal after reset the IC by HALT
or V
EE
OUT
terminal should be turned on/off
terminal (when only internal
EE
, V
HM17CM4096
OUT
, V
LCD
, V
1
EE
~V
), and then
4
become
EE
- 45 -
) of
DD
DD