OpenHardware.net announces the availability of the design data for a Motorola MC68EZ328 board design which runs the current uClinux (www.uClinux.org) embedded Linux distribution. All design data, including the schematics & PCB GERBER data files needed to reproduce the MPU board and a matching mini-motherboard, are available on the site, as well as a number of photos.

The 72-pin SIMM MPU board currently includes the following features:

• the MC68EZ328 CPU
  
• 2-8MB Flash memory
  
• 8MB EDO DRAM
  
• Battery-backed clock (Dallas DS1306E)
  
• 128K word external device bus
  
• Processor Reset & BDM mode invoked via the SIMM edge connector
  
• Lots of I/O pins! 9 general purpose I/O bits; 9 LCD control lines; 3 RS232 signals; 3 serial peripheral interface signals (SPI) at the SIMM edge connector
  
• External memory bus, organized as 128Kx16 for external add-on cards
  
• 96 bytes of battery backed SRAM (DS1306E)
  
• MPU can assert Reset to all bus devices
  
• Replaceable Lithium CR2032 “coin” battery
  
• GNU GCC development tools
  
• Approx. 80 mA current drain

The motherboard currently includes:

• a prototyping area
  
• Touch screen & LCD interface logic
  
• 3 switching power supplies (+5V, +3.3V, +35V)
  
• 4 SIMM sockets
  
• DB9 RS232 connector
  
• 30 terminals for wired connections
  
• 2 RJ45 jacks for Ethernet cards

The design was produced in response to the high cost of obtaining an evaluation board from Motorola. For further details, visit the project's website, at: http://www.openhardware.net/Users/TomW.

This design is reproducible under a “not for profit” copyright. What this means is quite simple: “if you want to sell, or bundle, my design for profit, I want some of it. If you produce the design to learn how to build 'such a thing' and do not make a profit in conjunction with its distribution, then you are free to do so.” This is not the GPL license, but the TPL license (Tom's Public License :^). For further information contact [email protected].

Editor's note: Tom says the schematics are not covered by the “TPL” license; they are freely available and you can see download them from the site.

Related stories:
OpenHardware releases Ethernet for open SBC design
OpenHardware.net — the Open Hardware Network

 
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