BMA222 Bosch Sensortec, BMA222 Datasheet - Page 46

• Manufacturer Part Number: BMA222
• Description: 3-AXIS ACCELEROMETER DIGITAL SMD
• Manufacturer: Bosch Sensortec

Specifications of BMA222

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 828-1025-2

(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´.
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] = [(0x22) 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.
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.
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´.
Rev. 1.0
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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.
Table 49: Threshold definition for the low-g interrupt, register (0x24)
Table 50: Delay time definition for the high-g interrupt, register (0x25)
Table 51: Threshold definition for the high-g interrupt, register (0x26)
Table 52: Samples number definition for the slope interrupt, register (0x27)
reserved
dur<7>
hy<1>
th<7>
high_
high_
high_
Bit 7
Bit 7
Bit 7
Bit 7
reserved
dur<6>
hy<0>
th<6>
high_
high_
high_
Bit 6
Bit 6
Bit 6
Bit 6
reserved
reserved
dur<5>
th<5>
high_
high_
Bit 5
Bit 5
Bit 5
Bit 5
reserved
reserved
dur<4>
th<4>
high_
high_
Bit 4
Bit 4
Bit 4
Bit 4
Data sheet
BMA222
Page 46
reserved
reserved
dur<3>
th<3>
high_
high_
Bit 3
Bit 3
Bit 3
Bit 3
reserved
dur<2>
th<2>
mode
high_
high_
Bit 2
Bit 2
Bit 2
Bit 2
low_
dur<1>
dur<1>
slope_
hy<1>
th<1>
high_
high_
Bit 1
Bit 1
Bit 1
Bit 1
low_
Bosch Sensortec
07 March 2011
dur<0>
dur<0>
slope_
hy<0>
high_
high_
th<0>
Bit 0
Bit 0
Bit 0
Bit 0
low_