LIS331DL Просмотр технического описания (PDF) - STMicroelectronics

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LIS331DL

MEMS motion sensor 3-axis - ±2g/±8g smart digital output “nano” accelerometer

STMicroelectronics 

Register description

LIS331DL

7.13 FF_WU_DURATION_1 (33h)

Table 36. FF_WU_DURATION_1 register

D7

D6

D5

D4

D3

D2

D1

D0

Table 37. FF_WU_DURATION_1 description

D7-D0

Duration value. Default value: 0000 0000

Duration register for Free-Fall/Wake-Up interrupt 1. Duration step and maximum value

depend on the ODR chosen. Step 2.5 msec, from 0 to 637.5 msec if ODR=400 Hz, else step

10 msec, from 0 to 2.55 sec when ODR=100 Hz. The counter used to implement duration

function is blocked when LIR=1 in configuration register and the interrupt event is verified

7.14

FF_WU_CFG_2 (34h)

Table 38. FF_WU_CFG_2 register

AOI

LIR

ZHIE

ZLIE

YHIE

YLIE

XHIE

XLIE

Table 39.

AOI

LIR

ZHIE

ZLIE

YHIE

YLIE

XHIE

XLIE

FF_WU_CFG_2 description

And/Or combination of Interrupt events. Default value: 0

(0: OR combination of interrupt events; 1: AND combination of interrupt events)

Latch Interrupt request into FF_WU_SRC_2 reg with the FF_WU_SRC_2 reg cleared

by reading FF_WU_SRC_2 reg. Default value: 0

(0: interrupt request not latched; 1: interrupt request latched)

Enable interrupt generation on Z High event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on measured accel. value higher than preset threshold)

Enable interrupt generation on Z Low event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on measured accel. value lower than preset threshold)

Enable interrupt generation on Y High event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on measured accel. value higher than preset threshold)

Enable interrupt generation on Y Low event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on measured accel. value lower than preset threshold)

Enable interrupt generation on X High event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on measured accel. value higher than preset threshold)

Enable interrupt generation on X Low event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on measured accel. value lower than preset threshold)

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