LIS302DL datasheet(26/42 Pages) STMICROELECTRONICS

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LIS302DL

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The device contains a set of registers which are used to control its behavior and to retrieve

acceleration data. The registers address, made of 7 bits, is used to identify them and to

write the data through serial interface.

7.1

WHO_AM_I (0Fh)

Table 17.

WHO_AM_I (0Fh) register

Device identification register. This register contains the device identifier that for LIS302DL is

set to 3Bh.

7.2

CTRL_REG1 (20h)

Table 18.

CTRL_REG1 (20h) register

Table 19.

CTRL_REG1 (20h) register description

DR bit allows to select the data rate at which acceleration samples are produced. The

default value is 0 which corresponds to a data-rate of 100Hz. By changing the content of DR

to “1” the selected data-rate will be set equal to 400Hz.

PD bit allows to turn on the turn the device out of power-down mode. The device is in power-

down mode when PD= “0” (default value after boot). The device is in normal mode when PD

is set to 1.

STP, STM bit is used to activate the self test function. When the bit is set to one, an output

change will occur to the device outputs (refer to

Table 3 and 4 for specification) thus

allowing to check the functionality of the whole measurement chain.

011

STP

STM

Zen

Yen

Xen

Data rate selection. Default value: 0

(0: 100 Hz output data rate; 1: 400 Hz output data rate)

Power Down Control. Default value: 0

(0: power down mode; 1: active mode)

Full Scale selection. Default value: 0

(refer to

Table 3 for typical full scale value)

STP, STM

Self Test Enable. Default value: 0

(0: normal mode; 1: self test P, M enabled)

Zen

Z axis enable. Default value: 1

(0: Z axis disabled; 1: Z axis enabled)

Yen

Y axis enable. Default value: 1

(0: Y axis disabled; 1: Y axis enabled)

Xen

X axis enable. Default value: 1

(0: X axis disabled; 1: X axis enabled)

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