I use the Si3210 chip to design an VoIP Gateway.I designed the hardware according the reference schemics and it was initialized according the reference code.I can read and write data through SPI,but I can not get the high voltage of DC-DC converter,which I cant figure out how it happened and get the problem solved.
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Check our web site for all the app notes for Si3210/11/15/16. You may have left out some calibration.