AN2381 datasheet(32/47 Pages) STMICROELECTRONICS

32 / 47 page

Registers Description

AN2381

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The number contained in the register represents the number of samples produced at the

sampling rate set by DF1, DF0 bits in CTRL_REG1.

Events having a duration shorter than the value specified in the FF_WU_DURATION

is generated as soon as the free-fall/wake-up event configured in FF_WU_CFG reg occurs

without waiting for any confirmation.

5.5

Direction-Detection Registers

The LIS3LV02DL allows the implementation of motion-controlled functions such as gaming

and terminal control while requiring reduced computational power to the application

controller. The following sections describes the functionality of the registers that are involved

in the recognition of the direction in which the terminal has been tilted.

5.5.1

DD_CFG (38h)

Direction Detector configuration register.

IEND enables the generation of an interrupt signal when a change in DD_SRC reg occurs,

i.e. when the tilt of terminal has changed with respect to the previous one.

IEND

LIR

ZHIE

ZLIE

YHIE

YLIE

XHIE

XLIE

IEND

Interrupt enable on Direction change. Default value: 0

(0: disabled 1: interrupt signal enabled)

LIR

Latch Interrupt request into DD_SRC register with the DD_SRC register cleared by

reading DD_ACK register. Default value: 0.

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

ZHIE

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