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LSM6DS33 SPI pin functions

Question asked by panse.prachi on Nov 25, 2016
Latest reply on Dec 1, 2016 by Petr S
As per the datasheet, the pin #3 of the LSM6DS33 device is used as 
1. I2C serial data (SDA)
2. SPI serial data input (SDI)
3. 3-wire interface serial data output (SDO)

In what SPI mode is it used as an input (SDI) and in what mode is it used as an output (SDO)?
Does the device support both 3 and 4-wire SPI interfaces?