Looking at JTAG signals on S/N 0x20. Now moving the T2 board from S/N 19 to S/N 0x21 for testing. Programming works, as expected. JTAG signals look quantitatively different, but the details would require days with a logic analyzer.

2013-05-02 - hazen

Chris changed the chip on S/N 0x20. Didn't help.

2013-04-30 - hazen

Mysteries with MMCs on new T2 boards. Chips are marked 3A1512 but ID as 3A0512 according to Wu.

Chip marking:

  32UC3A1512-U
  1114 D5CQ5.1

• Atmel product page – available only in TQFP100 which is what we have
• avr_mismatch.gif – screen capture of error when we try to ID the device with AVR Studio 5.1

-- EricHazen - 30 Apr 2013