LCD Character Module 20x4
Model No. WH2004B
►Character LCD 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)
►WH2004B : FFC connector
►WH2004F : 7 colors LED option
DESCRIPTION
WH2004B is a 20x4 Character LCD display module which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel, +5V power supply. This type of module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. WH2004B 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. The WH2004B have the same outline dimension and VA size, AA size as WH2004A but with different pin out. WH2004A is having 16-pin hole on PCB, as to the WH2004B is having a FFC connector.
There are different interface options for WH2004B series, details as below:
►WH2004B : 6800 interface (ST7066 IC)
►WH2004B1 : SPI interface (RW1063 IC)
►WH2004B2 : I2C interface (RW1063 IC)
There are different interface options for WH2004B series, details as below:
►WH2004B : 6800 interface (ST7066 IC)
►WH2004B1 : SPI interface (RW1063 IC)
►WH2004B2 : I2C interface (RW1063 IC)
DRAWING
SPECIFICATIONS
Interface Pin Function
WH2004B| 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 - |
Mechanical Data
| 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 |
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 | 4.50 | 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 | 02 | 13 | ||||||||||||
| DD RAM Address | 40 | 41 | 42 | 53 |
| DD RAM Address | 14 | 15 | 16 | 27 | ||||||||||||
| DD RAM Address | 54 | 35 | 56 | 67 |
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