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Atmel ATtiny13 I²C
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This is a set of example captures of the I²C traffic to/from the Atmel
ATtiny13 chip and the Cypress FX2 in the Braintechnology USB-LPS device.

Details:
http://www.atmel.com/images/doc2535.pdf
http://www.braintechnology.de/braintechnology/usb_lps.html


Logic analyzer setup
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The logic analyzer used was a CWAV USBee SX (at 12MHz):

  Probe       ATtiny13 pin
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  0 (black)   PB0
  1 (brown)   PB1/SDA
  2 (red)     PB2/SCL
  3 (orange)  PB3
  4 (yellow)  PB4
  5 (green)   PB5


Data
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The data contains the power-up sequence when the USB cable is attached.