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FXAS21002 (gyro) state diagram problem

Question asked by Harri Vanhala on Sep 18, 2015
Latest reply on Sep 21, 2015 by Tomas Vaverka

This may sound a stupid logical deadlock but I ask anyway:

 

FXAS21002 datasheet (Rev2.0, 2/2015) shows a transition diagram in Figure 15 on page 23.

 

According to the diagram: when the sensor is in the Active mode it can be directed to the Ready or the Standby mode by writing certain bits to the CTRL_REG1. The register description in chapter 6.15, page 42, clearly states that writing to CTRL_REG1 is allowed only in Standby or Ready mode, not in Active mode. Does this actually mean that the output data may be corrupted but the transition to the Ready or the Standby will take place anyway ie. the mode will be changed?

 

Best regards (and sorry for using bandwidth)

Harri Vanhala

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