AnsweredAssumed Answered

AD5724 Daisy chain read back Problem

Question asked by mzannerni on Nov 9, 2017
Latest reply on Nov 15, 2017 by mzannerni

Hello,

 

I am using two AD5724 in daisy chain mode, and I have no problem to write to the DACs, but I could not read back from them.

Once I try to read, the device stop responding to what I write.

 

I am using the fllwoing sequnce in software:

CS low

Write to all DAC registers ( DAC output responding)

Cs high

Delay

CS low

Send 0x800000 0x800000 (48 bit) through SPI to enable the read mode

Cs high

Delay

CS low

Send NOP 0x180000 0x180000 (48 bit) to read DAC0 in both chips

Cs high

 

At this point if I try to write anything the device will not respond, am I reading in a wrong way?

 

Thanks,

Mahmoud

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