SparkFun Qwiic GPIO Expansion – Sparkfun DEV-17047
The SparkFun Qwiic GPIO is an I²C device that unlocks a further eight IO pins to increase your capacity for prototyping on your Qwiic enabled project! Too many times we have found ourselves just one pin short when hooking up a project, adding another Arduino will increase the cost exponentially, so we use a GPIO to solve this common issue.
The Sparkfun Qwiic GPIO is an I²C device based around the TCA9534 I/O Expander IC from Texas Instruments. The board adds an additional eight IO pins which you can read and write just like any other digital pin on your controller. The details of the I²C interface have been taken care of in an Arduino library so you can call functions similar to Arduino’s
digitalWrite, allowing you to focus on your creation!
The TCA9534’s pins are broken out to easy-to-use latch terminals; never screw another wire into place! The terminals are relatively roomy themselves, so feel free to latch multiple wires into a ground or power terminal. With three customizable address jumpers, you can have up to eight Qwiic GPIO boards to be connected on a single bus allowing upwards of 64 additional GPIO pins! The default I²C is 0x27 and can be changed by adjusting the jumpers on the back of the board.
- Eight Configurable GPIO Pins Available
- I2C Address: 0x27 (Default)
- Hardware address pins allow up to eight boards on a single bus
- Input Polarity Inversion Register
- Control each I/O pin individually or all at once
- Open-Drain Active-Low Interrupt Output
- 2x Qwiic Connectors
- Length: 60.96mm (2.4″)
- Width: 38.1mm (1.5″)