LIS331DLTR(2007) Ver la hoja de datos (PDF) - STMicroelectronics

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LIS331DLTR
(Rev.:2007)

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

STMicroelectronics 

LIS331DL

7

Register description

Register description

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 10. WHO_AM_I register

0

0

1

1

1

0

1

1

Device identification register.

This register contains the device identifier that for LIS302DL is set to 3Bh.

7.2

CTRL_REG1 (20h)

Table 11. CTRL_REG1 register

DR

PD

FS

STP

STM

Zen

Yen

Xen

Table 12.

DR

PD

FS

STP, STM

Zen

Yen

Xen

CTRL_REG1 description

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 2 for typical full scale value)

Self Test Enable. Default value: 0

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

Z axis enable. Default value: 1

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

Y axis enable. Default value: 1

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

X axis enable. Default value: 1

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

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.

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