AnsweredAssumed Answered

AD5755 Communication problem

Question asked by hulk on Feb 4, 2013
Latest reply on Feb 4, 2013 by MCollins

Hi,

Which pins are necessary for proper communication. I connnected only Dvdd, Dgnd, Rst, DIN, DOUT, SCLK, /SYNC, AD0=DGND, AD1=DGND.  I have no idea what is wrong. At Dout i get only 0xFFFF when i want to read status register. I'll appreciate any suggestion.

To read status register, i'm sending 0x980000 and next (NOP) 0x1C0000 and i get 0xFFFF. I have looked at SPI waveform using oscilloscope and everthing looks ok, bits from left to right 1001 1000 0000 0000 0000 0000(0x980000) and 0001 1100 1110 0000 0000 0000 0000(NOP)

Best regards

Tomek

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