Waveshare AW9523B IO Expansion Board, I2C Interface, Expands 16 I/O Pins

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:

1. VCC: Power input(3.3V/5V)
2. GND: GND
3. SDA: I2C Data input
4. SCL: I2C Clock input
5. INT: Interrupt output
6. RST: Reset

Connect To STM32

Outline Dimensions:

Features: 

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

Packages Includes:

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

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