20x4 Blue Backlight VATN LCD Display
Model No. WH2004A-PLL
►20 Character x 4 line
►5x8 dots includes cursor
►Bulit-in controller (ST7066 or Equivalent)
►+5V power supply only
►1/16 duty cycle
►LED type : Blue
►LED can be driven by PIN1, PIN2 or K
►Interface : 6800
DESCRIPTION
The VATN display is featured with wide viewing angle and high contrast ratio, therefore, it’s very suitable for many applications. Below are the examples for reference.
- Industrial: Automotive application, Digital meter, UPS
- Medical: medical device & medical equipment
- Home appliance: audio, coffee machine, microwave oven
- Automobile: dashboard, car audio
DRAWING
SPECIFICATIONS
Interface Pin Function
| Pin No. | Symbol | Description |
|---|---|---|
| 1 | VSS | Ground |
| 2 | VDD | Power supply for logic |
| 3 | VO | Operating voltage for LCD |
| 4 | RS | H: DATA, L: Instruction code |
| 5 | R/W | Read/Write select signal |
| 6 | E | Chip enable signal |
| 7~14 | DB0~DB7 | Data bus line |
| 15 | Vee | Negative Voltage Output |
| 16 | K | Power supply for B/L - |
General Specification
| Item | Standard Value | Unit |
|---|---|---|
| Module Dimension | 98.0 × 60.0 | mm |
| Viewing Area | 77.0 × 25.2 | mm |
| Mounting Hole | 93.0 × 55.0 | mm |
| Character Size | 2.95 × 4.75 | mm |
Absolute Maximum Ratings
| Item | Symbol | Standard Value typ. |
Unit |
|---|---|---|---|
| Input Voltage | VDD | 5.0 | V |
| Recommended LCD Driving Voltage for Normal Temp. Version module @25°C |
VDD-VO | 6.5 | V |
Display Character Address Code
| Display position | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | --- | --- | 20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DD RAM Address | 00 | 01 | 02 | 13 | ||||||||||||||||
| DD RAM Address | 40 | 41 | 42 | 53 |
| DD RAM Address | 14 | 15 | 16 | 27 | ||||||||||||||||
| DD RAM Address | 54 | 55 | 56 | 67 |
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