NL128102AC23-02 NEC, NL128102AC23-02 Datasheet - Page 7

• Manufacturer Part Number: NL128102AC23-02
• Description: LCD Module
• Manufacturer: NEC

www.DataSheet4U.net
POWER SUPPLY SEQUENCE
(1) Logic signals (synchronous signals and control signals) should be “0” voltage (V), when VDD is not input.
(2) LCD module will shut down the power supply of driving voltage to LCD panel internally, when one of CLK,
(3) The backlight ON/OFF (BRTC signal) should be controlled while logic signals are supplied. The backlight
(4) Keep POWC signal “L” more than 200 ms after the power supply (V
(5) Analog RGB inputs are independent from this power supply sequence.
(6) Ripple of supply voltage
Example of the power supply connection
If input voltage to signal lines is higher than 0.3 V, the internal circuit will be damaged.
Hsync, and Vsync is not input more than 90 ms typically.
As the display data are unstable in this period, the display maybe disordered. But the backlight works correctly
even this period. So the backlight should be controlled by BRTC signal.
power supply (VDDB) is not related to the power supply sequence. However, unstable data will be displayed
when the backlight power is turned ON with no logic signals.
Acceptable range
Note 1: Synchronous signals, Control signals, CLK
Note 1:
a) Separate the power supply
Voltage
Power
Power
200 ms
The acceptable range of ripple voltage includes spike noise.
V
V
DD
DD
B
100 ms
Logic signals
(for logic and LCD driver)
Data Sheet EN0491EJ1V0DS00
100 mVp-p
POWC
V
V
DD
DD
Note 1
Wrong power sequence may damage the module.
CAUTION
b) Put the filter
0 <
Power
0 <
DD
) is input, if POWC signal is conrolled.
Filter
Filter
Time
NL128102AC23-02
(for backlight)
200 mVp-p
V
DD
V
V
B
DD
DD
B
www.DataSheet4U.net
7