LIS33DE

Register description

Doc ID 15596 Rev 1

23/31

7

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

CTRL_REG1 (20h)

Table 16.

CTRL_REG1 (20h) register

Table 17.

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 100 Hz. By changing the content of

DR to ‘1’ the selected data-rate will be set equal to 400 Hz.

PD bit allows to 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 bits are 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 2 and 3 for specification) thus

allowing to check the functionality of the whole measurement chain.

Zen bit enables the generation of Data Ready signal for Z-axis measurement channel when

set to ‘1’. The default value is ‘1’.

Yen bit enables the generation of Data Ready signal for Y-axis measurement channel when

set to ’1’. The default value is ’1’.

Xen bit enables the generation of Data Ready signal for X-axis measurement channel when

set to ’1’. The default value is ’1’.

DR

PD

FS

STP

STM

Zen

Yen

Xen

DR

Data rate selection. Default value: 0

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

PD

Power down control. Default value: 0

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

FS

Full scale selection. Default value: 0

(refer to table 2 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)