NT7702H-TABF4 데이터 시트보기 (PDF) - Novatek Microelectronics

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NT7702H-TABF4

240 Output LCD Segment/Common Driver

Novatek Microelectronics 

NT7702

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. That time, if DISPOFF removal time can not keep regulation what is shown AC

characteristics, the shift data is not reading 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, 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 as Dual Mode, D7 will be pulled-down

When the chip is used as 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. Avoiding floating

Not used

" XCK is pull-down in common mode, so connect to VSS or open

LCD driver output pins

" These correspond directly Corresponding directly to each bit of the shift register, one level (V0, V12, V43,

or V5) is selected and output

9

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