Description

AW9523B use I2C interface, allows using 4 expansion boards at the same time by modifying the i2c address, expand up to 64 I/O ports.
Pin configuration:

VCC: Power input(3.3V/5V)
GND: GND
SDA: I2C Data input
SCL: I2C Clock input
INT: Interrupt output
RST: Reset

Connect To STM32

Outline Dimensions:

Features:?

I2C bus, allows expanding 16 I/O ports by just using two wires
Support driving 16-ch common anode constant current LED, 256-step linear dimming, current controllable
Output interrupt (INT) signal when changing the state of an input port
I2C address configurable by shorting the A0/A1 jumpers
Provides two connector options: PH2.0 header and/or solder pads, allows multi I2C modules to be stacked
Onboard voltage translator, compatible with 3.3V/5V level
Comes with development resources and manual (examples for Raspberry Pi / micro:bit / Arduino / STM32)

Useful link:
To do Hardware and Software setup, please follow this tutorial.

Packages Includes:
1 x Waveshare AW9523B IO Expansion Board, I2C Interface, Expands 16 I/O Pins