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AD5672R Daisy chain not working

Hello

I'm currently working on daisy chaining 2 AD5672R DACs together, I've sent in the command(1000 and DB0=1) to enable the daisy chain mode but it doesn't seem to be responding to the command. I've attached a snap of the chipscope signals and i believe it is what is recommended on the datasheet. The first 8 writes are for the first AD5672R and the secnond 8(longer writes) are for the second AD5672R. could you please advice me on the normal process for daisy chaining these DACS. Also not seen in the pics is the LDAC is held low for the duration of the run any help would be great.

Thank you 

attachments.zip
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  • Hi,

    Can you please detail the frame by frame contents by chronological order? typical procedure is you set first device to enable daisy chain mode, then it can pass the enable daisy chain mode to second device. once they are all in daisy chain mode, you can push 48-bit frames (since you have 2 DACs) containing other commands, addresses and data, the first 24-bit is for the second device, and the second 24-bit is for the first device. 

    Cheers,

    Ivan

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  • Hi,

    Can you please detail the frame by frame contents by chronological order? typical procedure is you set first device to enable daisy chain mode, then it can pass the enable daisy chain mode to second device. once they are all in daisy chain mode, you can push 48-bit frames (since you have 2 DACs) containing other commands, addresses and data, the first 24-bit is for the second device, and the second 24-bit is for the first device. 

    Cheers,

    Ivan

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