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NT7702
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2. LCD Driver Output Voltage Level
The relationship amongst the data bus signal, AC converted signal FR and LCD driver output voltage is as shown in the table
below:
2.1. Segment Mode
FR
Latch Data
DISPOFF
Driver Output Voltage Level (Y1 - Y240)
LL
H
V43
LH
H
V5
HL
H
V12
HHH
V0
XX
L
V5
Here, VSS
≤ V5 < V43 < V12 < V0, H: VDD (+2.5 to +5.5V), L: VSS (0V), X: Don't care
2.2. Common Mode
FR
Latch Data
DISPOFF
Driver Output Voltage Level (Y1 - Y240)
LL
H
V43
LH
H
V0
HL
H
V12
HHH
V5
XX
L
V5
Here, VSS
≤ V5 < V43 < V12 < V0, H: VDD (+2.5 to +5.5V), L: VSS (0V), X: Don't care
Note: There are two kinds of power supply (logic level voltage, LCD driver voltage) for the LCD driver. Please supply regular
voltage which assigned by specification for each power pin.
That time "Don't care" should be fixed to "H" or "L", avoiding floating.