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Currently in stock
I/O Explorer USB

USB Port
5 x 12-pin Pmod™ headers
1 x 6-pin Pmod™ header
8 x R/C servo connectors
SPI master port
UART interface port
Digilent USB2 port providing board power, programming, and data transfers
  • AT90USB646 and ATmega165P AVR microcontrollers by Atmel
  • USB 2.0 Full Speed device
  • Fully software compatible with the Digilent Adept Runtime system
  • C/C++/C#/Visual Basic callable API set using the Digilent Adept System Software Developer’s Kit (SDK)
  • 16 discrete LEDs, 8 slide switches, 4 push button switches, 4-position DIP switch, 2 rotary encoders w/ integral push button, speaker/buzzer
  • 2 x 10-bit A/D inputs
  • 4 x 12-bit D/A outputs
  • Up to 52 digital input/output pins
  • Multiple power supply options, including USB-powered
  • ESD protection and short circuit protection for all I/O pins
Please Note: The I/O Explorer USB is a legacy product and is no longer supported by Xilinx's newer tool sets. As a result we will no longer be producing the board, and once current stock is depleted there will be no more. If you need help finding a replacement product, please view our comparison tables or email

The Digilent I/O Explorer USB is a USB peripheral device that allows programmatic access from a personal computer to various external Input/Output (I/O) devices.

Using the Digilent Adept Software Developer’s Kit (SDK) and the Digilent Adept Runtime System it is possible to write application programs running under either the Microsoft Windows or Linux operating systems that perform various kinds of I/O operations to devices on the I/O Explorer board itself, or through the I/O Explorer to devices external to the computer.

The I/O Explorer provides a number of I/O devices on the board itself, as well as RC servo connectors, and Digilent Pmod connectors that allow access to devices external to the I/O Explorer.

In addition to its use as a dedicated USB peripheral device, the I/O Explorer can also be used as a microcontroller development board. It features two Atmel AVR microcontrollers, one having USB device capability. Digilent makes available the firmware images needed to restore it to the factory configuration as a USB peripheral device if it has been reprogrammed with user defined firmware.

There are two UART signal pin assignment conventions in use on Digilent products. This product uses the old signal assignment convention. Connecting a product using the old convention with one using the new convention requires the use of a Digilent Pmod Crossover Cable. Click here for a more detailed explanation.

Related Products:

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Digilent Adept
  • Configure Xilinx logic devices, initialize scan chains, program FPGAs, CPLDs, and PROMs, and organize your configuration files
  • Transfer data to and from the onboard FPGA on your system board. Read from and write to specified registers. Load a stream of data to a register or read a stream of data from a register.
  • Organize and quickly connect to your communications modules.
  • Program Xilinx XCFS Platform Flash devices, Xilinx CoolRunner2 CPLDs, and most Xilinx Spartan and Virtex series FPGAs

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Currently in stock
GWS Servo Kit
  • Provides 0.23 second/60 degree rotation with 47 oz-in of Torque at 4.8V
  • Provides 0.18 second/60 degree rotation with 56 oz-in of Torque at 6V
  • 3-pin Futaba style connector
  • Includes a variety of servo horns, grommets and mounting screws.

Currently in stock
5V 4000mA Switching Power Supply
  • 5VDC switching supply, with 4000mA current
  • Comes with US and EU plug adapters
  • For use with Digilent FPGA & Microcontroller boards
  • Part# 240-030P

Support Documents:

Doc # Date Categories Description  
500-174 9/07/10 Product Documentation I/O Explorer USB schematics Download
502-174 9/07/10 Product Documentation I/O Explorer USB reference manual Download
DSD-0000280 9/07/10 Firmware Firmware images originally programmed into IOExplorer before shipping Download
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