SparkFun Qwiic GPIO Hookup Guide
Introduction
The SparkFun Qwiic GPIO is an I C device aimed at simplifying adding extra GPIO pins to a microcontroller. The
board uses the TCA9534U I/O Expander IC from Texas Instruments to add up to 8 digital inputs and outputs
controlled via an I C interface. The TCA9534U features three address select pins that can be set to configure eight
unique addresses meaning you can have up to
64
I/O pins controlled from a single I C bus!
2
2
2
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