20x4 STN LCD Display Module
Model No. WH2004L
►STN LCD Module, STN Display, STN LCD Ddisplay, LCD STN
►LCD Character Displays 20x4
►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
►LED can be driven by PIN1, PIN2, PIN15, PIN16 or A and K
►Interface : 6800, option SPI/I2C (RW1063 IC)
DESCRIPTION
WH2004L is 24 characters by 2 lines STN LCD display module which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel. These 20x4 LCD STN display modules are also available in SPI and I2C interface by using RW1063 controller IC. This type of STN LCD module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. WH2004L is available in several different backlight colors including blue, green, yellow-green, amber, red and white LEDs. The LEDs can be driven by pin 1, pin 2, or pin 15 pin 16 or A/K. There are different character fonts/texts available for ST7066 IC including English/Japanese, English/West European, English/Scandinavian European, or English/Cyrillic (Russian) as options.
There are different interface options for WH2004L series, details as below:
►WH2004L : 6800 interface (ST7066 IC)
►WH2004L1 : SPI interface (RW1063 IC)
►WH2004L2 : I2C interface (RW1063 IC)
There are different interface options for WH2004L series, details as below:
►WH2004L : 6800 interface (ST7066 IC)
►WH2004L1 : SPI interface (RW1063 IC)
►WH2004L2 : I2C interface (RW1063 IC)
DRAWING
SPECIFICATIONS
Interface Pin Function
| Pin No. | Symbol | Description |
|---|---|---|
| 1 | VSS | Ground |
| 2 | VDD | Power supply for logic |
| 3 | VO | Contrast Adjustment |
| 4 | RS | Data/ Instruction select signal |
| 5 | R/W | Read/Write select signal |
| 6 | E | Enable signal |
| 7~14 | DB0~DB7 | Data bus line |
| 15 | A | Power supply for B/L + |
| 16 | K | Power supply for B/L - |
| 17 | NC | No connection |
| 18 | NC | No connection |
Mechanical Data
| Item | Standard Value | Unit |
|---|---|---|
| Module Dimension | 146.0 × 62.5 | mm |
| Viewing Area | 123.5 × 43.0 | mm |
| Mounting Hole | 139.0 × 55.5 | mm |
| Character Size | 4.84 × 9.22 | 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 | 4.20 | V |
Display Character Address Code
| Display Position | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | --- | --- | 20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DD RAM Address | 00 | 01 | 13 | |||||||||||||
| DD RAM Address | 40 | 41 | 53 |
| DD RAM Address | 14 | 15 | 27 | |||||||||||||
| DD RAM Address | 54 | 55 | 67 |
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