Hi all,we have a problem with UCD9222. We designed a DSP board with nearly identicalUCD9222/7242 architecture as on the EVM6678, and now we want to programthe UCD9222 via TI's USB adapter. This works fine on five of our boards, so I thinkour circuitry should be ok. On one board, however, the Fusion software fails to connect the UCD9222. Maybe the UCD is damaged, but before replacing I want to ensure there isno other bug.So my question: what is minimally required to access the UCD registers viaPMBus? We have checked that V33DIO=V33A=3.3V available, AGND2=AGND3=DGND=0V,/reset=1 and en1=en2=1. Are there more requirements to access the registersvia PMBus? Do you have any further suggestions where to start searching?We have only a small number of prototype boards, so it would be fine to getthem all working.Thanks in advance for your help.Regards,Marcus
problem is identified. We have a massive soldering defect of the UCD on this board.
The PMBus pins along with many others are not connected.
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