BMA222 Datasheet, PDF (46/74 Pages) List of Unclassifed Manufacturers – Digital, triaxial acceleration sensor

BMA222
Data sheet
Bosch Sensortec
(0x24) high_hy sets the hysteresis of the high-g interrupt. The meaning of an LSB of (0x24)
high_hy depends on the selected g-range. It corresponds to an acceleration difference of 125
mg in 2g-range, 250 mg in 4g-range, 500 mg in 8g-range, and 1000mg in 16g-range.
Default value of (0x24) high_hy is ´10b´.
Table 49: Threshold definition for the low-g interrupt, register (0x24)
Bit 7
high_
hy<1>
Bit 6
high_
hy<0>
Bit 5
Bit 4
Bit 3
reserved reserved reserved
Bit 2
low_
mode
Bit 1
low_
hy<1>
Bit 0
low_
hy<0>
Register (0x25) contains the delay time definition for the high-g interrupt. The physical delay
time can be computed from the content of (0x25) high_dur according to
delay [ms] = [(0x25) high_dur + 1] • 2 ms. Possible delay times range from 2 ms to 512 ms.
Default value of (0x25) high_dur is 0x0F, corresponding to a delay of 32 ms.
Table 50: Delay time definition for the high-g interrupt, register (0x25)
Bit 7
high_
dur<7>
Bit 6
high_
dur<6>
Bit 5
high_
dur<5>
Bit 4
high_
dur<4>
Bit 3
high_
dur<3>
Bit 2
high_
dur<2>
Bit 1
high_
dur<1>
Bit 0
high_
dur<0>
Register (0x26) contains the threshold definition for the high-g interrupt. The meaning of an
LSB of (0x26) high_th depends on the selected g-range. It corresponds to 7.81 mg in 2g-range,
15.63 mg in 4g-range, 31.25 mg in 8g-range, and 62.5 mg in 16g-range.
Default value of (0x26) high_th is 0xC0.
Table 51: Threshold definition for the high-g interrupt, register (0x26)
Bit 7
high_
th<7>
Bit 6
high_
th<6>
Bit 5
high_
th<5>
Bit 4
high_
th<4>
Bit 3
high_
th<3>
Bit 2
high_
th<2>
Bit 1
high_
th<1>
Bit 0
high_
th<0>
Register (0x27) contains the definition of the number of samples to be evaluated for the slope
interrupt (any-motion detection). The number of samples is N = (0x27) slope_dur + 1.
Default value of (0x27) slope_dur is ´00b´.
Table 52: Samples number definition for the slope interrupt, register (0x27)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
reserved reserved reserved reserved reserved reserved
Bit 1
slope_
dur<1>
Bit 0
slope_
dur<0>
Rev. 1.15
Page 46 / not for publishing
31 - May - 2012
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such
as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.