NT7704H-BDT View Datasheet(PDF) - Novatek Microelectronics
Part Name
Description
Manufacturer
NT7704H-BDT Datasheet PDF : 40 Pages
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NT7704
Common mode continued
Symbol
Function
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
" While set to “L”, the contents of the shift resister are reset and are not reading data. When the DISPOFF
function is canceled, the driver outputs deselect level (V12 or V43), and the shift data is read on the 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, the shift data is not read correctly
FR
AC signal input for LCD driving waveform
" The input signal is level-shifted from logic voltage level to the LCD driver voltage level, and it controls the
LCD driver circuit
" Normally, it inputs a frame inversion signal
The LCD driver output pin’s output voltage level can be set using the shift register output signal and the FR
signal
MD
Mode selection pin
" When set to VSS level “L”, Single Mode operation is selected. When set to VDD level “H”, Dual Mode
operation is selected
D7
S/C
D0 - D6
XCK
Y1 - Y240
Dual Mode data input pin
" According to the data shift direction of the data shift register, data can be input starting from the 121st bit
When the chip is used in Dual Mode, D7 will be pulled-down
When the chip is used in Single Mode, D7 won’t be pulled-down
Segment mode/common mode selection pin
" When set to VSS level “L”, common mode is set
Not used
" Connect D0-D6 to VSS or VDD. Avoid floating
Not used
" XCK is pull-down in common mode, so connect to VSS or leave open
LCD driver output pins
" These correspond directly to each bit of the shift register, one level (V0, V12, V43, or V5) is selected and
output
8
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