Hi,
Thanks for your inquiry.
If you read BNO055 register 0x01 at page 0, you will get value of 0xFB for accel chip ID. This means that BMA280 is inside BNO055 because BMA280 chip ID is 0xFB. If you look at page 42 of BMA280 datasheet at https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bma280-ds000.pdf, you will find that when slo_no_mot_dur <5:0> = 0b010000 = 16, the duration = 40s which is close to 36s that you got. So the formula should be,
slo_no_mot_dur <5:4> = '0b01' --> [slo_no_mot_dur <3:0> * 8 + 40] second
Sorry for the typo in BNO055 datasheet. We will fix it in the new version later.
Thanks.
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