Kakapo net+sd shield

Those of you who have been following his personal twitter account will have seen endless pictures of the shiny new net+sd shield for the Kakapo.

There’s plenty of shields with Ethernet and SD card support, but there’s a few different things about this one compared to others:

• The latest WizNet W5500 hardware TCP/IP chip
  • 32kB SRAM, 8 sockets
  • Automatic circular buffer management
  • Compact 48-pin LQFP chip
  • SPI support up to 80MHz
  • Variable length transfers to reduce overhead
  • 10/100 Full and Half Duplex support
• Built-in I2C MAC address EEPROM
• MicroSD card socket
• W5500 chip is automatically reset by Kakapo reset sources
• W5500 and SD card MISO shield pin is buffered; does not drive pin at all when deselected
• Four status LEDs: Link, Activity, 100M and Full Duplex
• Jumpers for easy disable/enable features; no soldering to free shield pins from features not required!
  • Jumpers for W5500 !CS line and !INT lines
  • Jumper for SD card !CS line
  • Jumper for I2C 4.7k pull-up resistors
  • Opening !CS jumpers enforces part remains deselected
• MAC address sticker for easy identification
• All pins used explained on the bottom side of the shield
• Same pins used as the common Arduino Ethernet shield

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