RGB Backlight Negative LCD 20x4
20x4 character LCD with light text on a dark background and a full RGB backlight for software-controlled character color. HD44780-compatible; dual backlight LEDs at ~20 mA each, total ~40 mA per channel at 5V.
Pinout
- VSS1
ground
Type · Ground - VDD2
logic supply
Type · Power - VO3
contrast input
Type · Signal - RS4
register select
Type · Signal - RW5
read/write select
Type · Signal - E6
enable
Type · Signal - D07
data bit 0
Type · GPIO - D18
data bit 1
Type · GPIO - D29
data bit 2
Type · GPIO - D310
data bit 3
Type · GPIO - D411
data bit 4
Type · GPIO - D512
data bit 5
Type · GPIO - D613
data bit 6
Type · GPIO - D714
data bit 7
Type · GPIO - ALED+15
backlight anode
Type · Power - KLED-16
backlight cathode
Type · Power
| Pin | Position | Type | Function |
|---|---|---|---|
| VSS | 1 | Ground | ground |
| VDD | 2 | Power | logic supply |
| VO | 3 | Signal | contrast input |
| RS | 4 | Signal | register select |
| RW | 5 | Signal | read/write select |
| E | 6 | Signal | enable |
| D0 | 7 | GPIO | data bit 0 |
| D1 | 8 | GPIO | data bit 1 |
| D2 | 9 | GPIO | data bit 2 |
| D3 | 10 | GPIO | data bit 3 |
| D4 | 11 | GPIO | data bit 4 |
| D5 | 12 | GPIO | data bit 5 |
| D6 | 13 | GPIO | data bit 6 |
| D7 | 14 | GPIO | data bit 7 |
| ALED+ | 15 | Power | backlight anode |
| KLED- | 16 | Power | backlight cathode |
Pin details
16 connections- VSS1
ground
Ground - VDD2
logic supply
Power - VO3
contrast input
Signal - RS4
register select
Signal - RW5
read/write select
Signal - E6
enable
Signal - D07
data bit 0
GPIO - D18
data bit 1
GPIO - D29
data bit 2
GPIO - D310
data bit 3
GPIO - D411
data bit 4
GPIO - D512
data bit 5
GPIO - D613
data bit 6
GPIO - D714
data bit 7
GPIO - ALED+15
backlight anode
Power - KLED-16
backlight cathode
Power
Start wiring
SPI · I2C · 3.3 V · 3.3 – 5 V · Breakout
Adafruit describes product 398 as a 16x2 RGB backlight LCD using digital pins for LCD control and PWM pins for the backlight; the product…
Module pins: VSS, VDD, A/LED+, K/LED-, VO, RS, RW, E. Schematik maps them to your board in the app.
TFT & LCD
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