AIS2IH datasheet(46/63 Pages) STMICROELECTRONICS

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8.25

WAKE_UP_DUR (35h)

Wakeup and sleep duration configuration register (r/w)

Table 69. WAKE_UP_DUR register

FF_DUR5

WAKE_

DUR1

WAKE_

DUR0

STATIONARY

SLEEP_ DUR3 SLEEP_ DUR2 SLEEP_ DUR1 SLEEP_ DUR0

Table 70. WAKE_UP_DUR register description

FF_DUR5

Free-fall duration. In conjunction with FF_DUR [4:0] bit in FREE_FALL (36h) register.

1 LSB = 1 * 1/ODR

WAKE_DUR[1:0]

Wakeup duration. 1 LSB = 1 *1/ODR

STATIONARY

Enable stationary detection / motion detection with no automatic ODR change when detecting stationary state.

Default value: 0

(0: disabled; 1: enabled)

SLEEP_ DUR[3:0]

Duration to go in sleep mode.

Default value is SLEEP_ DUR[3:0] = 0000 (which is 16 * 1/ODR).

1 LSB = 512 * 1/ODR

8.26

FREE_FALL (36h)

Free-fall duration and threshold configuration register (r/w)

Table 71. FREE_FALL register

FF_DUR4

FF_DUR3

FF_DUR2

FF_DUR1

FF_DUR0

FF_THS2

FF_THS1

FF_THS0

Table 72. FREE_FALL register description

FF_DUR [4:0]

Free-fall duration. In conjunction with FF_DUR5 bit in WAKE_UP_DUR (35h) register.

1 LSB = 1 * 1/ODR

FF_THS [2:0]

Free-fall threshold @ FS = ±2 g (refer to Table 73)

Table 73. FREE_FALL threshold decoding @ ± 2 g FS

FF_THS[2:0]

Threshold decoding (LSB)

000

001

010

011

100

101

110

111

AIS2IH

WAKE_UP_DUR (35h)

DS12421 - Rev 4

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