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High contrast negative mode LCD display module
High contrast negative mode LCD display module ADG9680A1
Model No. :ADG9680A1
►96x80 COG display
►Graphic LCD
►Built-in controller ST7571
►5V power supply
►1/65 Duty, 1/9 Bias
►Interface Input Data : 4 wire SPI 6800/8080
Description of high contrast negative mode LCD display module ADG9680A1
High contrast negative mode LCD display module are LCDs where the characters/icons are brighter colored against a dark, black background. Providing a very sharp contrast. High contrast negative mode LCD display module has sharper contrast than FSTN .
The features of LCD are as follows
* Display mode :DFSTN , Negative, Transmissive
* Display dot Color :White
* Display Format : 96Dots × 80Dots graphic
* IC : ST7571_V1.
* Interface Input Data :4 wire SPI 6800/8080
* Driving Method : 1/80 Duty, 1/10 Bias
* Viewing Direction : 12 O’clock
* Backlight : LED( BLUE)
Module Size24(W) X29.5(H) X3.9(T)mm
Viewing Area20.6(W) X 20.6(H)mm
Effective Display Area17.2(W) X17.5(H)mm
Number of Dots96 X 80 Dots-
Dot Size0.164(W) X 0.204(H)mm
Dot Pitch0.179(W) X 0.219(H)mm
3-2-1.Electrical Characteristics
Supply Voltage For LogicVDD – VSSTa=25℃
Supply Voltage For LCDVopTa=25℃9.69.810.0V
Input Voltage“H” LevelV IHTa=25℃0.7VDD-VDDV
“L” LevelV ILVSS-0.3VDDV
Output Voltage“H” LevelV OHIOUT= -0.5mA0.8VDD-VDDV
“L” LevelV OLIOUT= 0.5mAVSS-0.2VDDV
Current ConsumptionIDDVIN = VDD--2mA
NOTE: 1) Duty ratio=1/80, Bias=1/10 2) Measured in Dots ON-state
3-3-1. Absolute Maximum Ratings
Forward CurrentIFTa= 25℃--30mA
Reverse VoltageVR--5V
3-3-2. Opto-electronic Characteristics
Forward VoltageVFTa= 25℃
Bl Luminous--940-cd/m²
* The brightness is measured without LCD panel
1Driving voltageVop09.910.210.5V1
2Response timeTr0N/A298.6.750ms5
3Viewing Angle⊙2-⊙1256060N/ADeg3.4
4Contrast RatioK252.002.123.25 2
5Frame FrequencyFfN/A586470Hz2
5. Interface Pin Function
Pin NO.SymbolI / OFunctions
1VGIVG is the LCD driving voltage for segment circuits.
2VD1IWhen DCPS=L, output voltage=2.4V.
When DCPS=H, output voltage=VDD1.
3XV0IXV0 is the LCD driving voltage for common circuits at positive frame.
4V0IV0 is the LCD driving voltage for common circuits at negative frame.
5VM0IVMO is the output of VM, which is the LCD driving voltage for common circuits.
A storage capacitor on FPC or system for VM is required.
Be aware that: 0.7V < VM < VDD2.
6VSSI/OGround for digital circuit.
7VDDPPower supply for digital circuit
8SIDOSerial input data.
9SCLKOSerial input clock.
10A0ORegister select input pin.
A0 = “H”: DB0 to DB7 are display data.
A0 = “L”: DB0 to DB7 are control command.
A0 is not used in serial 3-Line and I2C interface; it is recommended to fix A0 at “H” by VDD1.
11RSTOReset input pin.
When RST is “L”, initialization is executed
12CSBOChip select input pin.
The interface is enabled only when CSB is "L" (except I2C Interface).
When CSB is non-active, DB[7:0] are high impedance.
CSB is not used in I2C interface; it is recommended to fix CSB at “H” by VDD1.
13AOPower supply for backlight.
14KOGround supply for backlight.
1.What are FSTN and FFSTN (DFSTN) ?
· FSTN – Film compensated STN, Formulated STN or Filtered STN. A passive matrix LCD technology that uses a film compensating layer between the STN display and rear polarizer for added sharpness and contrast. It was used in laptops before the DSTN method became popular and many early 21st Century cellphones.
· FFSTN – Double film super-twist nematic
2.When are SPI interfaces used ?
SPI interfaces are used when the micro-controller has to transmit data to a device without an internal clock. This is precisely the situation that occurs when we use the MicroStamp11 to transmit data to the shift-register. The MicroStamp11 has an internal clock, but the shift-register has no clock. We usually think of the device with the clock as a master and the other device as a slave.
3.What is COG display ?
COG stands for chip-on-glass technology in reference to displays. The driver IC in this construction form is applied directly onto the glass and generates the necessary multiplex rates and bias voltages for the segment/pixel drive. Thereby only the power supply and a communication interface (e.g. I2C, SPI) must be made available on the user side. Only a few lines from the COG module to the board are needed with these serial interfaces,. Usually the contacting of the COG modules takes place via FPC or PINsGraphic LCD
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