40x4 Character LCD Display, Display LCD 40x4
Model No. WH4004A
►Character Display LCD 40x4
►5x8 dots includes cursor
►Bulit-in controller (ST7066 or Equivalent)
►+5V power supply ( Also available for +3V)
►Negative voltage optional for +3V power supply
►1/16 duty cycle
►Interface: 6800
►LED can be driven by PIN1, PIN2, PIN17, PIN18 or A and K
DESCRIPTION
WH4004A is 40x4 Character LCD display module which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel and 5V or 3.3V power supply option. This 40x4 LCD display WH4004A is available for no backlight or with LED backlight options. This LCD display 40x4 is available in various LCD panel colors including gray, yellow/green and blue LCD options. This display LCD 40x4 module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃, its built in character set supports English/Japanese, English/West European, English/Scandinavian European, or English/Cyrillic (Russian) options.
DRAWING
SPECIFICATIONS
40x4 Character LCD Datasheet
Interface Pin Function
| Pin No. | Symbol | Description |
|---|---|---|
| 1~8 | DB7~DB0 | Data bus line |
| 9 | E1 | Enable signal |
| 10 | R/W | Read/Write select signal |
| 11 | RS | Data/ Instruction select signal |
| 12 | VO | Contrast Adjustment |
| 13 | VSS | Ground |
| 14 | VDD | Power supply for logic |
| 15 | E2 | Enable signal |
| 16 | NC | No connection |
| 17 | A | Power supply for B/L + |
| 18 | K | Power supply for B/L - |
Mechanical Data
| Item | Standard Value | Unit |
|---|---|---|
| Module Dimension | 190.0 × 54.0 | mm |
| Viewing Area | 147.0 × 29.5 | mm |
| Mounting Hole | 183.0 × 47.0 | mm |
| Character Size | 2.78 × 4.89 | mm |
Electrical Characteristics
| Item | Symbol | Standard Value typ. |
Unit |
|---|---|---|---|
| Input Voltage | VDD | 3/5 | V |
| Recmmended LCD Driving Voltage for Normal Temp. Version module @25°C |
VDD-VO | 4.35 | V |
Display Character Address Code
| Display Position | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | --- | --- | --- | 40 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DD RAM Address | 00 | 1 | 27 | Lin1 | |||||||||||||
| DD RAM Address | 40 | 41 | 67 | Lin2 | |||||||||||||
| DD RAM Address | 00 | 01 | 27 | Lin3 | |||||||||||||
| DD RAM Address | 40 | 41 | 67 | Lin4 |
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