2013-05-03 - hazen
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
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EricHazen - 30 Apr 2013