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errata.md

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Rev 1.1

Minor

  • Silkscreen indicates wrong polarity on tantalum capacitors (also in 1.0)
  • First batch lacked polarity indicators on some ICs (has been fixed in PCB layout)
  • First batch had Q31 reversed. Some boards will ship without Q31.
  • TUSB1210 power sequencing requirements conflict with zynq. Lowering the threshold for the 1.8V OK signal is probably a good idea.

Rev 1.0

Major

  • T1 pinout wrong. workaround: cut thermals to pin 4
  • D6, D7, D8 connected to wrong node. workaround: leave them out
  • T3, T4, T5, T6 drain and source swapped
  • Displayport Hotplug signal not connected

Minor

  • JTAG traces should not go through the connector pads (in case pads get destroyed)
  • Holes for through hole components should have larger annular rings
  • FT2232D was most likely a bad idea
  • R78, R79 serve no purpose, leds pull up more strongly
  • Should have a power LED and a power switch
  • power connector pinout doesn't match silkscreen
  • ETHRESET/ETHINT/USB0RESET/USB1RESET are 1.8V level, but connected to 3.3V output (can be worked around by tristating)

BOM errors

  • T2 has wrong footprint. AON7534 happens to fit on this footprint by pure chance. FDMS7676 fits perfectly.
  • S1 does not fit footprint
  • C194, C195, C196, C197 should be 0603, not 0402