LPS22HHTR datasheet(45/59 Pages) STMICROELECTRONICS

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DocID030890 Rev 2

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LPS22HH

9.7

CTRL_REG2 (11h)

Control register 2 (R/W)

The BOOT bit is used to refresh the content of the internal registers stored in the Flash

memory block. At device power-up, the content of the Flash memory block is transferred to

the internal registers related to the trimming functions to allow correct behavior of the device

itself. If for any reason the content of the trimming registers is modified, it is sufficient to use

this bit to restore the correct values. When the BOOT bit is set to '1', the content of the

internal Flash is copied into the corresponding internal registers and is used to calibrate the

device. These values are factory trimmed and they are different for every device. They allow

the correct behavior of the device and normally they should not be changed. At the end of

the boot process, the BOOT bit is set again to '0' by hardware. The BOOT bit takes effect

immediately after it is set to 1.

INT_H_L selects an interrupt active-high/low value.

PP_OD selects push-pull/open-drain on the interrupt pad.

The IF_ADD_INC bit enables the address to be automatically incremented during a multiple

byte access with a serial interface (SPI or I²C).

The SWRESET bit resets the volatile registers to default value ‘0’. It returns to ‘0’ by

hardware.

BOOT

INT_H_L

PP_OD

IF_ADD_INC

SWRESET

LOW_NOISE_EN

ONE_SHOT

BOOT

Reboots memory content. Default value: 0

(0: normal mode; 1: reboot memory content)

INT_H_L

Interrupt active-high, active-low. Default value: 0

(0: active high; 1: active low)

PP_OD

Push-pull/open-drain selection on interrupt pad. Default value: 0

(0: push-pull; 1: open-drain)

IF_ADD_INC

serial interface (I²C or SPI). Default value: 1

(0: disable; 1: enable)

SWRESET

Software reset. Default value: 0

(0: normal mode; 1: software reset).

The bit is self-cleared when the reset is completed.

LOW_NOISE_EN Enables low noise (used only if ODR is lower than 100 Hz). Default value: 0

(0: low-current mode; 1: low-noise mode)

ONE_SHOT

Enables one-shot. Default value: 0

(0: idle mode; 1: a new dataset is acquired)

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