AD5270 Command Operating

Hello i am using AD5270 with MCU(STM32F4). 

i want to control resistor only using RDAC, so i send command 

1) 0x1C02 ( RDAC register write protect - allow update of wiper position through digital interface )

2) 0x0464 ( Send data 100 ) 

i attached oscilloscope file. Please refer followings;

 

After sending the commands, AD5270 doesn't change resistor value .

please check and send to me for confirmation.

thank you.

Best regards,

Tak Young

attachments.zip
Parents
  • Hi Rainier,

    Thank you for your reply. i using 3series  AD5270 for test circuit.

    I modified it the way you suggested. AD5270 still doesn't change resistor value .  Please refer followings; 

     

                                                          < Figure 1. t5,t6 timing>

     

                                                          < Figure 2. 0x1C03>

                                                         < Figure 3. 0x0465 >

     

    please check and send to me for confirmation.

     

    thank you.

     

    Best regards,

    Tak Young

Reply
  • Hi Rainier,

    Thank you for your reply. i using 3series  AD5270 for test circuit.

    I modified it the way you suggested. AD5270 still doesn't change resistor value .  Please refer followings; 

     

                                                          < Figure 1. t5,t6 timing>

     

                                                          < Figure 2. 0x1C03>

                                                         < Figure 3. 0x0465 >

     

    please check and send to me for confirmation.

     

    thank you.

     

    Best regards,

    Tak Young

Children
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