Hacking hardware for chumby

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Revision as of 23:32, 5 August 2007 by Awalton (Talk | contribs)

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Note - this page is for hacking of "Ironforge" production hardware.
For information about alpha prototypes, please see Hacking hardware for Foo/Katamari.

What's in a chumby?

  • 350MHz Freescale iMX21 MC94MX21DVKN3 ARM9 controller Datasheet Technical Information
  • Samsung 64MB SDRAM on 32-bit data path
  • Hynix HY27US 64MB NAND Flash ROM
  • Three USB 2.0 full speed ports, one internal, two external
  • Xterasys 3135G 802.11g USB Wifi adapter (ralink chipset)
  • DataImage 320hx240v TFT display with touchscreen
  • Texas Instruments TSC2110 Programmable Touchscreen Controller with Stereo DAC
  • 2W stereo speakers, with headphone jack
  • Built-in microphone
  • "Bend" switch
  • Kionix KXP74-1050 3-axis accelerometer Datasheet
  • STMicroelectronics STR711FR0/1 ARM7 "crypto" processor Datasheet
  • Soft-switch on power, controlled by crypto processor
  • TTL serial port @38400 8N1

Power requirements

The chumby uses a very standard 2.1mm I.D. x 5.5mm O.D. x 9.5mm Female (P-5) barrel connector and runs off 1A at anywhere between 6.5 VDC and 14.5 VDC.
It ships with a "wallwart" power supply with US-style prongs, however, it's pretty easy to find a compatible power supply with other form factors.