AN3393 datasheet(11/103 Pages) STMICROELECTRONICS

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AN3393

Operating modes

103

Operating modes

The LIS3DSH provides two different operating modes: power-down mode and normal

mode.

After the power supply is applied, the LIS3DSH performs a 10 ms boot procedure to load

trimming parameters from internal Flash memory. After the boot is completed, the device is

automatically configured in power-down mode.

Referring to the LIS3DSH datasheet, the output data rate (ODR) and Zen, Yen, Xen bits of

the CTRL_REG4 register are used to select the operating modes (power-down and Normal

mode) and the output data rate (see Table 1).

Table 2 shows typical values of power consumption for the different operating modes.

Table 1. Data rate configuration

ODR3

ODR2

ODR1

ODR0

ODR selection

0000

Power-down

0001

3.125 Hz

0010

6.25 Hz

0011

12.5 Hz

0100

25 Hz

0101

50 Hz

0110

100 Hz

0111

400 Hz

1000

800 Hz

0001

1600 Hz

Table 2. Power consumption

ODR (Hz)

Current consumption (μA) @ Vdd = 2.5 V [typ.]

Power-down

3.125

6.25

12.5

119

100

225

400

225

800

225

1600

225

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