Hardware designs for the HU320 USB Interface PCB. The source files are produced in Diptrace (a free version is available)
The HU320 design includes an Atmel Mega16u2 USB microcontroller and support hardware (crystal, regulator etc), and a 30pin IDC-style connector to break out the following hardware features:
- SPI Port
- I2C Port
- UART
- GPIO Pins
- Timer / PWM