COG LCD arduino
COG LCD arduino ADM12864A19
Model No. ADG12864A19
►128x64 COG display
►Graphic LCD
COG LCD arduino
COG LCD arduino ADM12864A19
Model No. ADG12864A19
►128x64 COG display
►Graphic LCD
►Built-in controller UC1701X
►5V power supply
►1/65 Duty, 1/9 Bias
►Interface : 4-wire Serial Interface MPU
Description of COG LCD arduino ADM12864A19
COG LCD arduino are monochromatic passive or active matrix LCD displays that can display information as text or in a dot matrix pattern. Since COG LCD arduinos don't have a built-in PCB board, the IC is directly mounted on the glass of the display.
1. FEATURES
The features of LCD are as follows
* Display mode : FSTN, Positive, Transflective
* Color : Display dot : Balck
Background: white
* Display Format : 128 X 64 Dots
* IC : Ultra Chip: UC1701X
* Interface Input Data : 4-wire Serial Interface MPU
* Driving Method : 1/65Duty, 1/9Bias
* Viewing Direction : 6 O’clock
* Backlight : WHITE
2. MECHANICAL SPECIFICATIONS
Item | Specification | Unit |
Module Size | 39.3(W) x 25.8(H) | mm |
Viewing Area | 36.32MIN(W) x 18.62MIN(H) | mm |
Effective Display Area | 34.92(W) x17.45(H) | mm |
Character Font | 128 x 64 Dots | - |
Dot Size | 0.253(W) X 0.253(H) | mm |
Dot Pitch | 0.273(W) X 0.273 (H) | mm |
3. ELECTRICAL SPECIFICATIONS (Continued)
3-2. Electrical Characteristics (Vss=0V)
Item | Symbol | Test | Min. | Typ. | Max. | Unit | |
Logic Supply Voltage | VDD – VSS | Ta=0~50°C | 2.4 | 3.0 | 3.3 | V | |
LCD Drive Voltage | VOP=V0–VSS | Ta=25°C | 8.7 | 9.0 | 9.3 | V | |
Input Voltage | “H” Level | V IH | VDD=3.3V65% | 0.8VDD | - | - | V |
“L” Level | V IL | - | - | 0.2VDD | V | ||
Output oltage | “H” Level | V oH | VDD=3.3V65% | 0.8VDD | - | - | V |
“L” Level | V oL | - | - | 0.2VDD | V | ||
Current Consumption | IDD | VDD=3.3V65% | - | 0.11 | 2.0 | mA | |
NOTE: 1) Duty Ratio=1/65, Bias Ratio=1/9 2) Measuring in Dots ON-state
4. BLOCK DIAGRAM
Reference circuit using internal HV generator circuit
5. ELECTRO – OPTICAL CHARACTERISTICS
Item | Symbol | Temp. | Min. | Typ. | Max. | Unit | Conditions | Note |
Viewing | Θ2 –Θ1 | 25℃ | 30 | 70 | - | Deg. | - | 1,2 |
Φ | 60 | 80 | - | |||||
Contrast | Cr | 25℃ | 2 | 5 | - | - | Θ=0° | 3 |
Response | Tr | 25℃ | - | 140 | 250 | ms | Θ=0° | 4 |
0℃ | - | 950 | 1150 | |||||
Response | Tf | 25℃ | - | 222 | 250 | ms | Θ=0° | 4 |
0℃ | - | 950 | 1150 |
Note1 . Definition of Angle Θ&Φ | Note2. Definition of Viewing Angle Θ1&Θ2 |
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Note3 . Definition of Contrast Cr | Note4. Definition of Optical Response |
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6. TERMINAL PIN FUNCTION
6-1. Interface Pin Function Description
Pin NO. | Symbol | I / O | Functions |
1 | CS0 | I | Chip Select or chip address. |
2 | RST | I | When RST=”L”, all control registers are re-initialized by their default states. |
3 | CD | I | Select the incoming command if it is a control instruction or for display data. |
4 | SCK | I/O | Bi-directional bus for both serial and parallel host interfaces. |
5 | DATA | ||
6 | VDD | Power | VDD supplies for display data RAM and digital logic. |
7 | VSS | Ground | Ground. Connect VSS and VSS2 to the shared GND pin. |
8 | VB0+ | I | LCD Bias Voltage. These are the voltage sources to provide SEG driving currents. These voltages are generated internally. Connect capacitors of CBX value between VBX+ and VBX-. |
9 | VB0- |
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10 | VB1- |
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11 | VB1+ | - | |
12 | VLCD | Power | LCD Power Supply. |
OUTLINE DIMENSION
FAQ
1.What is FSTN LCD ?
Answer :FSTN (Film-compensated Super-twisted Nematic) provides a sharper contrast than STN by adding a film. The cost is approximately 5% higher than STN. FSTN works great for indoor and outdoor applications and is mainly used in graphic displays and higher end products.
2.How can I reduce the LCD signal noise?
Noise on an LCD signal can be reduced with a termination resistor and capacitor that can be tuned to the cable characteristics. This will allow you to soften the edges and reduce the noise. If the screen tears sideways, there is generally a problem with noise on the horizontal sync signal causing irregular resets to the left-hand side of the screen. If you see a vertical rolling effect, it is generally noise on the vertical sync line or a missing sync signal.
3.Are initialization codes available for Amotec LCD displays?
The initialization codes can be found in the LCD specification, and or in the controller specification.
4.What is a serial interface?
A serial interface is a communication interface between two digital systems that transmits data as a series of voltage pulses down a wire. A "1" is represented by a high logical voltage and a "0" is represented by a low logical voltage. Essentially, the serial interface encodes the bits of a binary number by their "temporal" location on a wire rather than their "spatial" location within a set of wires. Encoding data bits by their "spatial" location is referred to as a parallel interface and encoding bits by their "temporal" location is referred to as a serial interface. Figure 3 graphically illustrates the difference between these two communication methods.
Figure 3: Difference between parallel and serial interfaces
