20x2 Character LCD Modules
Model No. WH2002M
►Character LCD 20x2
►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), option SPI/I2C (RW1063 IC)
Description
WH2002M is a 20x2 Character LCD display module which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel. These 20x2 LCD display modules are also available in SPI and I2C interface by using RW1063 controller IC. This type of module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. WH2002M 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.
DRAWING
Data source ref:WH2002M-TFH-ET#
SPECIFICATIONS
Interface Pin Function
| Pin No. | Symbol | Level | Description |
|---|---|---|---|
| 1 | VSS | 0V | Ground |
| 2 | VDD | 5.0V | Supply Voltage for logic |
| 3 | VO | (Variable) | Operating voltage for LCD |
| 4 | RS | H/L | H: DATA, L: Instruction code |
| 5 | R/W | H/L | H: Read L: Write |
| 6 | E | H,H→L | Chip enable signal |
| 7 | DB0 | H/L | Data bus line |
| 8 | DB1 | H/L | Data bus line |
| 9 | DB2 | H/L | Data bus line |
| 10 | DB3 | H/L | Data bus line |
| 11 | DB4 | H/L | Data bus line |
| 12 | DB5 | H/L | Data bus line |
| 13 | DB6 | H/L | Data bus line |
| 14 | DB7 | H/L | Data bus line |
| 15 | A | － | Power supply for B/L + |
| 16 | K | － | Power supply for B/L - |
Mechanical Data
| Item | Dimension | Unit |
|---|---|---|
| Number of Characters | 20 Characters x 2 Lines | － |
| Module dimension | 146.0 x 43.0 x 13.7 (MAX) | mm |
| View area | 123.0 x 23.0 | mm |
| Active area | 118.84 x 18.97 | mm |
| Dot size | 0.92 x 1.1 | mm |
| Dot pitch | 0.98 x 1.16 | mm |
| Character size | 4.84 x 9.22 | mm |
| Character pitch | 6.0 x 9.75 | mm |
| Duty | 1/16 | |
| Backlight Type | LED | |
| IC | ST7066U | |
| Interface | 6800 | |
Absolute Maximum Ratings
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Temperature | TOP | -20 | － | +70 | ℃ |
| Storage Temperature | TST | -30 | － | +80 | ℃ |
| Input Voltage | VI | VSS | － | VDD | V |
| Supply Voltage For Logic | VDD-VSS | -0.3 | － | 7 | V |
| Supply Voltage For LCD | VDD-Vo | -0.3 | － | 13 | V |
Electrical Characteristics
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage For Logic | VDD-VSS | － | 4.5 | 5.0 | 5.5 | V |
| Supply Voltage For LCD | VDD-V0 | Ta=-20℃ Ta=25℃ Ta=70℃ |
－ 4.4 3.8 |
－ 4.5 － |
5.5 4.6 － |
V V V |
| Input High Volt. | VIH | － | 0.7 VDD | － | VDD | V |
| Input Low Volt. | VIL | － | Vss | － | 0.6 | V |
| Output High Volt. | VOH | － | 3.9 | － | VDD | V |
| Output Low Volt. | VOL | － | 0 | － | 0.4 | V |
| Supply Current | IDD | VDD=5.0V | 1.0 | 1.2 | 1.5 | mA |
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