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ADXL362 - Activity/Inactivity bits in Loop Mode

Question asked by Odyssey on May 28, 2015
Latest reply on Jun 5, 2015 by Odyssey

We set the ADXL in LoopMode as described in the datasheet. We can see the AWAKE bit going from 0 to 1 and back to 0 when we do a shake and put it back on the table. So the transition between active and inactive is properly set on the AWAKE bit.

 

We would expect the inactive bit being set when at rest (NOT AWAKE) and the active bit being set when active (AWAKE), that's not what we are seeing.


In case there is a movement the status register displays 0x65  [AWAKE=1, INAC=1, FIFOW=1, DATAR=1]


In case of rest on the table we see: 0x01 [AWAKE=0, INAC=0, ACT=0, DATAR=1]

 

The details of the setup are:

 

We send the initialization commands as follow:

 

0x0A 0x1F 0x52

0x0A 0x20 0xFA

0x0A 0x21 0x00

0x0A 0x23 0x96

0x0A 0x24 0x00

0x0A 0x25 0x1E

0x0A 0x27 0x3F

0x0A 0x2D 0x02


We read the status regsiter sending the command: 0x0B 0x0B we are not able to decrease the period of reading at this point in time.


 



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