Two BeagleBone black boards with 1GHZ processors do not make boot sequece 
after some unsucceseful attemts to format eMMC.
It looks like they do not make PORz sequence. Both ocillators inacvtive. 
NRESET_INOUT is low. PORZn input high. All power voltages are OK.
I use simple code wich make BBB to act as USB flash drive to monitor eMMC 
with my PC. Code based on TI usb_dev_msc example in StarterWare.
It begin happens only with new boards. Old revision boards works OK.
Any body can help ?
I going to use JTAG to debug this processors but not shure that JTAG will 
work in this case.

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