Datasheet

DocID025056 Rev 6 37/53

LIS2DH12 Register description

8.9 CTRL_REG4 (23h)

Table 37. CTRL_REG4 register

BDU BLE

(1)

1. The BLE function can be activated only in high-resolution mode

FS1 FS0 HR ST1 ST0 SIM

Table 38. CTRL_REG4 description

BDU Block data update. Default value: 0

(0: continuous update;

1: output registers not updated until MSB and LSB have been read)

BLE Big/Little Endian data selection. Default value: 0

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

The BLE function can be activated only in high-resolution mode

FS[1:0] Full-scale selection. Default value: 00

(00: ±2 g; 01: ±4 g; 10: ±8 g; 11: ±16 g)

HR Operating mode selection (refer to section 3.2.1: High-resolution, normal

mode, low-power mode)

(1)

1. By design, when the device from high-resolution configuration (HR) is set to power-down mode (PD), it is

recommended to read register REFERENCE (26h) for a complete reset of the filtering block before

switching to normal/high-performance mode again for proper device functionality.

ST[1:0] Self-test enable. Default value: 00

(00: self-test disabled; other: see Table 39)

SIM SPI serial interface mode selection. Default value: 0

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

Table 39. Self-test mode configuration

ST1 ST0 Self-test mode

0 0 Normal mode

0 1 Self test 0

1 0 Self test 1

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