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CNTRL about UCD9222

guoping Lee
Expert 1010 points
Other Parts Discussed in Thread: UCD9222

Hi everyone.

when I configure the UCD9222 through PMBus adapter,I find out that the cntrl pin can not be pulled up by PMBus adapter.so I delete R321,then,the cntrl pin is 3.3V,but the PMBus adaper can not connect to UCD9222,why?Does the cntrl pin must low to allow PMBus adapter connect?