How to read back the contents of the RDAC registers of ADI5121/5141 by SPI bus ?

Hi ,

The AD5121/5141 datasheet does not further description for SPI read back,

I would like to ask about read RDAC register by SPI  process,

I am not sure that the host pulls sync pin as low , sends 2 bytes(control & address / data) , 

and then sends 8 clocks to read the data in RDAC register,

the host pulls sync pin as high. 

Is this procedure correct?

 

I appreciate your message and thank you.

best regards

Ray Yang

Parents
  • Hi Koushik,

    Thank you for your reply, I have any questions to ask you.

    reading process for AD5121/AD5141

    stage 1 :  pull low SYNC pin as low

    stage 2 :  host  sends command 3 to device ( b0011 0000 0000 0011)

    stage 3 :  host reads data from device ( host sends 8 clocks to device and data from SDO) <=  Is this correct?

    stage 4 :  pull up SYNC pin as high

    stage 5 :  End of transmission

    Are the stage 3 and 4 correct process ?

    Regards,

    Ray Yang

Reply
  • Hi Koushik,

    Thank you for your reply, I have any questions to ask you.

    reading process for AD5121/AD5141

    stage 1 :  pull low SYNC pin as low

    stage 2 :  host  sends command 3 to device ( b0011 0000 0000 0011)

    stage 3 :  host reads data from device ( host sends 8 clocks to device and data from SDO) <=  Is this correct?

    stage 4 :  pull up SYNC pin as high

    stage 5 :  End of transmission

    Are the stage 3 and 4 correct process ?

    Regards,

    Ray Yang

Children