16x2 character LCD with black text on a light background and an RGB backlight, allowing software-controlled background color. HD44780-compatible interface; RGB backlight on pins 15–18, with onboard current-limiting resistors for 5V operation.
logic ground
logic supply
LCD contrast input
register select
read/write select
enable strobe
parallel data bit 0
parallel data bit 1
parallel data bit 2
parallel data bit 3
parallel data bit 4
parallel data bit 5
parallel data bit 6
parallel data bit 7
backlight LED anode
backlight LED cathode
green backlight LED control pin
blue backlight LED control pin
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VSS | 1 | Ground | logic ground | 0V |
| VDD | 2 | Power | logic supply | 5V typical |
| VO | 3 | Analog | LCD contrast input | contrast voltage |
| RS | 4 | GPIO | register select | |
| RW | 5 | GPIO | read/write select | |
| E | 6 | GPIO | enable strobe | |
| D0 | 7 | GPIO | parallel data bit 0 | |
| D1 | 8 | GPIO | parallel data bit 1 | |
| D2 | 9 | GPIO | parallel data bit 2 | |
| D3 | 10 | GPIO | parallel data bit 3 | |
| D4 | 11 | GPIO | parallel data bit 4 | |
| D5 | 12 | GPIO | parallel data bit 5 | |
| D6 | 13 | GPIO | parallel data bit 6 | |
| D7 | 14 | GPIO | parallel data bit 7 | |
| A | 15 | Power | backlight LED anode | |
| K | 16 | Unknown | backlight LED cathode | |
| G | 17 | Unknown | green backlight LED control pin | |
| B | 18 | Unknown | blue backlight LED control pin |
logic ground
logic supply
LCD contrast input
register select
read/write select
enable strobe
parallel data bit 0
parallel data bit 1
parallel data bit 2
parallel data bit 3
parallel data bit 4
parallel data bit 5
parallel data bit 6
parallel data bit 7
backlight LED anode
backlight LED cathode
green backlight LED control pin
blue backlight LED control pin
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: VDD, VSS. Schematik maps them to your board in the app.
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