LIS3MDL datasheet(26/33 Pages) STMICROELECTRONICS

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Registers description

LIS3MDL

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DocID024204 Rev 4

7.4

CTRL_REG3 (22h)

7.5

CTRL_REG4 (23h)

Table 26. CTRL_REG3 register

0(1)

1. These bits must be set to ‘0’ for correct functioning of the device

0(1)

SIM

MD1

MD0

Table 27. CTRL_REG3 description

Low-power mode configuration. Default value: 0

If this bit is ‘1’, DO[2:0] is set to 0.625 Hz and the system performs, for each

channel, the minimum number of averages. Once the bit is set to ‘0’, the mag-

netic data rate is configured by the DO bits in CTRL_REG1 (20h) register.

SIM

SPI serial interface mode selection. Default value: 0

(0: 4-wire interface; 1: 3-wire interface).

MD[1:0]

Operating mode selection. Default value: 11

Refer to Table 28.

Table 28. System operating mode selection

MD1

MD0

Mode

Continuous-conversion mode

Single-conversion mode

Single-conversion mode has to be used with sampling frequency from 0.625 Hz

to 80Hz.

Power-down mode

Table 29. CTRL_REG4 register

0(1)

1. These bits must be set to ‘0’ for correct functioning of the device

0(1)

OMZ1

OMZ0

BLE

0(1)

Table 30. CTRL_REG4 description

OMZ[1:0]

Z-axis operative mode selection.

Default value: 00. Refer to Table 31.

BLE

Big/Little Endian data selection. Default value: 0

(0: data LSb at lower address; 1: data MSb at lower address)

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