NXP PCA9698 Demo Board


Easily Test and Demonstrate the PCA9698 40-Bit GPIO

This add-on to NXP’s I2C 2005-1 demo board makes it easy to test and design with the PCA9698, a Fast-mode Plus (Fm+) GPIO device, that provides 40-bit I/O expansion with outputs capable of sourcing 10mA and sinking 25mA with a total package load of 1A.

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  • Easy-to-use daughter card with comprehensive evaluation software
  • Demonstrates a wide range of functions
  • 1MHz Fast-mode Plus I2C-bus serial interface with 30mA drive
  • Complies with I2C-bus Fast-mode (400kHz) and Standard-mode (100kHz)
  • 2.3 to 5.5V operation with 5.5V-tolerant I/O
  • 40 configurable I/O pins that default to inputs at power-up
  • Designed for live insertion in PICMG applications
  • Onboard PCA9530 LED dimmer/blinker for LED applications
  • Low standby current
  • Temperature range: -40 to +85 °C


PCA9698 Demo Board

The PCA9698 Demo Board contains the NXP PCA9698, four status LEDs, seven user-controllable LEDs, and a high-intensity RGB LED.

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The board is designed to quickly set-up, allowing you to explore configuring the PCA9698 with a simple GUI interface. The board’s layout provides access to the 40 advanced GPIO pins using standard 0.100″ spacing headers. On-board LEDs are present so that the user can visually check the effect of changing register settings in the PCA9698. A user manual is available describing three commonly used configurations:

Demonstration 1: Controlling LEDs Using GPIO Output

This demonstration shows you how to use the PCA9698 in GPO mode through turning on and off the on-board LEDs.

Demonstration 2: GPIO Input

In this demonstration, you explore GPIO input using polling mode and interrupt mode.

Demonstration 3: LED Blinking and Dimming with the PCA9530

This colorful demonstration pairs the PCA9698 with a PCA9530 to create a powerful visual experience. The PCA9530 controls the OE pin of the PCA9698, creating eye-catching blinking and dimming patterns.


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