Name: Adafruit RGB Positive 16x2 LCD+Keypad Kit for Raspberry Pi
Brand: Adafruit
SKU: 1109

Logical pinout · physical placement not verified

SDA
Raspberry Pi I2C data line used by the Pi Plate; Adafruit states the plate uses the Pi I2C SDA/SCL pins and the CircuitPython example constructs I2C with board.SCL and board.SDA.
Type · I2C
SCL
Raspberry Pi I2C clock line used by the Pi Plate; Adafruit states the LCD, RGB backlight, and keypad are controlled through the two I2C pins.
Type · I2C
LCD 16x2 character display
On-board 16x2 character LCD controlled through the Pi Plate I2C port-expander path; the product page describes controlling the LCD through the two I2C pins.
Type · Unknown
RGB backlight control
Three backlight colour control channels handled by the Pi Plate; Adafruit states up to 3 backlight pins are controlled using only the two I2C pins on the Raspberry Pi.
Type · Control
Up button
On-board directional keypad button read through the I2C port expander; Adafruit states the kit provides four directional buttons plus Select without extra Raspberry Pi GPIO pins.
Type · Unknown
Down button
On-board directional keypad button read through the I2C port expander.
Type · Unknown
Left button
On-board directional keypad button read through the I2C port expander.
Type · Unknown
Right button
On-board directional keypad button read through the I2C port expander.
Type · Unknown
Select button
On-board Select keypad button read through the I2C port expander.
Type · Unknown

Pin	Type	Function
SDA	I2C	Raspberry Pi I2C data line used by the Pi Plate; Adafruit states the plate uses the Pi I2C SDA/SCL pins and the CircuitPython example constructs I2C with board.SCL and board.SDA.
SCL	I2C	Raspberry Pi I2C clock line used by the Pi Plate; Adafruit states the LCD, RGB backlight, and keypad are controlled through the two I2C pins.
LCD 16x2 character display	Unknown	On-board 16x2 character LCD controlled through the Pi Plate I2C port-expander path; the product page describes controlling the LCD through the two I2C pins.
RGB backlight control	Control	Three backlight colour control channels handled by the Pi Plate; Adafruit states up to 3 backlight pins are controlled using only the two I2C pins on the Raspberry Pi.
Up button	Unknown	On-board directional keypad button read through the I2C port expander; Adafruit states the kit provides four directional buttons plus Select without extra Raspberry Pi GPIO pins.
Down button	Unknown	On-board directional keypad button read through the I2C port expander.
Left button	Unknown	On-board directional keypad button read through the I2C port expander.
Right button	Unknown	On-board directional keypad button read through the I2C port expander.
Select button	Unknown	On-board Select keypad button read through the I2C port expander.

Logical pinout · physical placement not verified

Pin details

9 connections

SDA
Raspberry Pi I2C data line used by the Pi Plate; Adafruit states the plate uses the Pi I2C SDA/SCL pins and the CircuitPython example constructs I2C with board.SCL and board.SDA.
I2C
SCL
Raspberry Pi I2C clock line used by the Pi Plate; Adafruit states the LCD, RGB backlight, and keypad are controlled through the two I2C pins.
I2C
LCD 16x2 character display
On-board 16x2 character LCD controlled through the Pi Plate I2C port-expander path; the product page describes controlling the LCD through the two I2C pins.
Unknown
RGB backlight control
Three backlight colour control channels handled by the Pi Plate; Adafruit states up to 3 backlight pins are controlled using only the two I2C pins on the Raspberry Pi.
Control
Up button
On-board directional keypad button read through the I2C port expander; Adafruit states the kit provides four directional buttons plus Select without extra Raspberry Pi GPIO pins.
Unknown
Down button
On-board directional keypad button read through the I2C port expander.
Unknown
Left button
On-board directional keypad button read through the I2C port expander.
Unknown
Right button
On-board directional keypad button read through the I2C port expander.
Unknown
Select button
On-board Select keypad button read through the I2C port expander.
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: SDA, SCL. Schematik maps them to your board in the app.

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