expandIO-USB

Driver-free USB I/O expander for software-controlled peripherals

expandIO-USB is an ultra-low cost USB I/O expander. It is a PIC microcontroller to be remotely controlled via USB, significantly reducing time-to-market for simple USB-based products.  Interface options include I2C and SPI serial communication to slave devices, making it ideal for adding ultra-low cost USB interfacing to a wide variety of sensors. 

expandIO-USB uses the Human Interface Device (HID) USB profile. It does not require USB drivers and so is immediately plug-and-play compatible with present and future Windows, Linux and Mac operating systems.

expandIO0USB is firmware for the PIC18 microcontrollers from 20 pins to 80 pins and is available as a pre-programmed chip from electronics distributors or as a firmware download from www.hexwax.com.   

Features 

  • 10-bit A/D, digital I/O, counter input, interrupts, comparators, CCP, SPI, I2C
  • Flexible access to most microcontroller registers
  • True HID plug and play - No drivers required 
  • Ultra-low cost, single chip solution
  • Low speed version uses a low cost resonator, 200 commands/sec
  • Full speed version can process up to 32K commands per second 
  • No Vendor ID / Product ID registration required 
 

5-Minute Product Training Module	expandIO-USB Data Sheet	Device pinouts appendix	USB HID products Dev Kit
C# Interface Example with thanks to Aldo Hoyt	Delphi Interface Example with thanks to Petr Frank	Circuit Cellar Article

USB Evaluation Board