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AD5270 Command Operation


Our customer has troubled command operation of AD5270. They send the commands by following order and setting.

   1) 0x2400

   2) 0x1000

   3) 0x1C02

   4) 0x0400

After sending the commands, they checked the position of the digital rheostat wiper. The position was center.

Are there any problems in the order and/or setting of the commands?

And could you please advise me, why do we need an external pull-up resistor on SDO pin if it is not use?

Best regards,