Hedgehog, a general purpose computer board

Hedgehog is a general purpose computer board containing a microcontroller and an FPGA. It was designed to study in practice implementing SDL designs using HW/SW co-design, since there are not so many boards available with a CPU and an FPGA in the same card. Keeping this in mind Hedgehog was designed to be as generic as possible with lot's of outputs and memory, and of course, as cheap as possible, so it can be used in education purposes also.

Specifications

• microcontroller, Motorola MC68302, 16MHz or 20MHz
• FPGA, Xilinx XC4010/13/25 (PGA191/223)
• 520kBytes SRAM, 256kBytes EPROM

I/O connectors and peripherals of CPU

• RS232 9-pin D-style connector
• LCD-connector, compatible at least with Hitachi LCD-modules with or without backlit
• DIN5 keyboard connector for PC/AT keyboards
• 4 buffered inputs
• 4 buffered outputs
• buffered serial telecommunications pins for example to connect CPU with Crystal AD/DA boards

• two DIP14 oscillator modules
• 16 unbuffered general I/O pins
• 8 unbuffered general I/O pins
• 8 buffered output pins
• 8 buffered input pins
• general I/O connector opimized to connect FPGA to Texas C5x evaluation cards
• 8 controllable LEDs connected to the FPGA

The picture on the right shows testing of the board with a logic analyzer.

Pekka.Martikainen@cs.tut.fi