RGB Backlight Positive LCD 16x2
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.
Pinout
- VSS1
logic ground
Type · GroundVoltage · 0V - VDD2
logic supply
Type · PowerVoltage · 5V typical - VO3
LCD contrast input
Type · AnalogVoltage · contrast voltage - RS4
register select
Type · GPIO - RW5
read/write select
Type · GPIO - E6
enable strobe
Type · GPIO - D07
parallel data bit 0
Type · GPIO - D18
parallel data bit 1
Type · GPIO - D29
parallel data bit 2
Type · GPIO - D310
parallel data bit 3
Type · GPIO - D411
parallel data bit 4
Type · GPIO - D512
parallel data bit 5
Type · GPIO - D613
parallel data bit 6
Type · GPIO - D714
parallel data bit 7
Type · GPIO - A15
backlight LED anode
Type · Power - K16
backlight LED cathode
Type · Unknown - G17
green backlight LED control pin
Type · Unknown - B18
blue backlight LED control pin
Type · Unknown
| 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 |
Pin details
18 connections- VSS1
logic ground
GroundVoltage · 0V - VDD2
logic supply
PowerVoltage · 5V typical - VO3
LCD contrast input
AnalogVoltage · contrast voltage - RS4
register select
GPIO - RW5
read/write select
GPIO - E6
enable strobe
GPIO - D07
parallel data bit 0
GPIO - D18
parallel data bit 1
GPIO - D29
parallel data bit 2
GPIO - D310
parallel data bit 3
GPIO - D411
parallel data bit 4
GPIO - D512
parallel data bit 5
GPIO - D613
parallel data bit 6
GPIO - D714
parallel data bit 7
GPIO - A15
backlight LED anode
Power - K16
backlight LED cathode
Unknown - G17
green backlight LED control pin
Unknown - B18
blue backlight LED control pin
Unknown
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: VDD, VSS. Schematik maps them to your board in the app.
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