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NT7704 Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers

Part No. NT7704
Description  240 Output LCD Segment/Common Driver
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Manufacturer  ETC1 [List of Unclassifed Manufacturers]
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NT7704 Datasheet(HTML) 6 Page - List of Unclassifed Manufacturers

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NT7704
6
Pad Description
Segment mode
Symbol
Function
VDD
Logic system power supply pin connects from +2.5 to +5.5V
VSS
Ground pin connects to 0V
VOR, VOL
V12R, V12L
V43R, V43L
V5R, V5L
Power supply pin for LCD driver voltage bias
" Normally, the bias voltage used is set by a resistor divider
" Ensure that the voltages are set such that VSS
≤ V5 < V43 < V12 < V0
" To further reduce the differences between the output waveforms of the LCD driver output pins Y1 and Y240,
externally connect ViR and ViL (I = 0, 12, 43, 5)
D0 - D7
Input pin for display data
" In 4-bit parallel input mode, input data into the 4 pins D0 - D3. Connect D4 - D7 to VSS or VDD
" In 8-bit parallel input mode, input data into the 8 pins D0 - D
XCK
Clock input pin for taking display data
" Data is read on the falling edge of the clock pulse
LP
Latch pulse input pin for display data
" Data is latched on the falling edge of the clock pulse
L/R
Direction selection pin for reading display data
" When set to VSS level "L", data is read sequentially from Y240 to Y1
" When set to VDD level "H", data is read sequentially from Y1 to Y240
DISPOFF
Control input pin for output deselect level
" The input signal is level-shifted from the logic voltage level to the LCD driver voltage level, and controls the
LCD driver circuit.
" When set to VSS level “L”, the LCD driver output pins (Y1-Y240) are set to level V5
" When DISPOFF is set to “L”, the contents of the line latch are reset, but the display data in the data
latch are read regardless of the condition of DISPOFF . When the DISPOFF function is canceled,
the driver outputs deselect level (V12 or V43), then outputs the contents of the date latch onto the next
falling edge of the LP. At that time, if the DISPOFF removal time can not keep regulation with what is
shown on the AC characteristics, then it can not output the reading data correctly.
FR
AC signal input for LCD driving waveform
" The input signal is level-shifted from the logic voltage level to the driver voltage level and controls
the LCD driver circuit.
" It normally inputs a frame inversion signal
The LCD driver output pin’s output voltage level can be set to the line latch output signal and the FR signal
MD
Mode selection pin
" When set to VSS level “L”, 8-bit parallel input mode is set
" When set to VDD level “H", 4-bit parallel input mode is set


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