LPS22HB datasheet(34/49 Pages) STMICROELECTRONICS

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LPS22HB

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DocID027083 Rev 5

The device contains a set of registers which are used to control its behavior and to retrieve

pressure and temperature data. The register address, made up of 7 bits, is used to identify

them and to read/write the data through the serial interface.

9.1

INTERRUPT_CFG (0Bh)

Interrupt mode for pressure acquisition configuration.

To generate an interrupt event based on a user-defined threshold, the DIFF_EN bit must be

set to '1' and the threshold values stored in THS_P_L (0Ch) and THS_P_H (0Dh).

When DIFF_EN = '1', the PHE bit or PLE bit (or both bits) have to be enabled.

When DIFF_EN is enabled and AUTOZERO or AUTORIFP is enabled, the defined pressure

threshold values in THS_P (0Ch, 0Dh) is compared with:

P_DIFF_IN = measured pressure - REF_P

76543210

AUTORIFP

RESET_ARP

AUTOZERO

RESET_AZ

DIFF_EN

LIR

PLE

PHE

AUTORIFP

Enable AUTORIFP: function. Default value: 0

(0: normal mode; 1: AutoRifP enabled)

RESET_ARP Reset AutoRifP function. Default value: 0

(0: normal mode; 1: reset AutoRifP function)

AUTOZERO

Enable Autozero function. Default value: 0

(0: normal mode; 1: Autozero enabled)

RESET_AZ

Reset Autozero function. Default value: 0

(0: normal mode; 1: reset Autozero function)

DIFF_EN

Enable interrupt generation. Default value: 0

(0: interrupt generation disabled; 1: interrupt generation enabled)

LIR

Latch interrupt request to the INT_SOURCE (25h) register. Default value: 0

(0: interrupt request not latched; 1: interrupt request latched)

PLE

Enable interrupt generation on pressure low event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on pressure value lower than preset threshold)

PHE

Enable interrupt generation on pressure high event. Default value: 0

(0: disable interrupt request;

1: enable interrupt request on pressure value higher than preset threshold)

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