Home Products Character LCD WH2004A

Character Module 20x4

Model No. WH2004A

►Character LCD 20x4
►5x8 dots includes cursor
►+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 (ST7066 IC or Equivalent), option SPI/I2C (RW1063 IC)
►WH2004B : FFC connector
►WH2004F : 7 colors LED option


Winstar WH2004A is a Character LCD 20x4 display which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel.  These 20x4 LCD modules are also available in SPI and I2C interface by using RW1063 controller IC. WH2004A is available in several different backlight colors including blue, green, white, yellow-green, amber, red, white, and RGB LEDs.   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 WH2004A series, details as below:
►WH2004A : 6800 interface (ST7066 IC)
►WH2004A1 : SPI interface (RW1063 IC)
►WH2004A2 : I2C interface (RW1063 IC)


Winstar WH2004A Character Module 20x4


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 -

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
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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