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Does SDO in AD9910 go to high-impedance when not in use?

Question asked by AndiN on May 15, 2013
Latest reply on May 27, 2013 by AndiN

For our application we need to communicate with a lot of individual AD9910 cores. Keeping the circuitry as simple as possible we want to switch the CS-Line via an adress-decoder and feed the remaining serial communications signal to all connected ICs in parallel. While this is certainly possible for "controller => AD9910" communication on SDIO & SCLK, the datasheet remains unclear, whether this can be done with the SDO-pin as well.

 

When configured as a serial output line, does the SDO-pin go into a high-impedance state when the IC does not communicate and therefore release control of a common SDO-bus-line to other cores?

 

Thanks in advance

Andreas

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