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ADXL362 SPI communication issues

Question asked by ech on Jul 20, 2015
Latest reply on Aug 4, 2015 by neilzhao

Hi,

 

We currently have issues in our board with the ADXL362. In some cases we read 0 or 255 from all registers and in some cases we read values as expected. It is randomly.

 

We follow the design guides from your datasheet. My initial question is:

 

In the datasheet it says:

 

"...The ADXL362 does not require any particular startup transient characteristics, except that it must always be started up from 0 V. When the device is in operation, any time power is removed from the ADXL362, or falls below the operating voltage range, the supplies (VS, VDD I/O, and any bypass capacitors) must be discharged completely before power is reapplied. To enable supply discharge, it is recommended to power the device from a microcontroller GPIO, connect a shutdown discharge switch to the supply (Figure 47), or use a voltage regulator with a shutdown discharge feature, such as the ADP160."

 

If we don't start from 0V, can this explain the issue we see?

 

Thx

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