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AD9524 SDO pin operation with CS high

Question asked by mdme on Jul 18, 2013
Latest reply on Aug 21, 2013 by JLKeip

Can someone please confirm for me whether the SDO pin on the AD9524 is high impedance when the CS line is high and the SPI serial port is being used in the unidirectional I/O mode?

 

According to the Rev.D datasheet both the SDO and SDIO lines are high impedance when CS is high.

However, in the Rev.C datasheet only the SDIO line goes high impedance. In an earlier question (28538) it is stated that SDO is always active and cannot be used in a multislave bus and that the datasheet is correct (Rev.C).

 

The earlier question suggest that the Rev.C datasheet was correct, but this contradicts the newer datsheet.

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