LPS22HBTR datasheet(18/49 Pages) STMICROELECTRONICS

Part #	LPS22HBTR

Description	MEMS nano pressure sensor: 260-1260 hPa absolute digital output barometer

PDF	49 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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18 / 49 page

FIFO

LPS22HB

18/49

DocID027083 Rev 5

5.2

FIFO mode

In FIFO mode (FIFO_CTRL (14h)(FMODE2:0) = 001) data from the output

PRESS_OUT_XL (28h), PRESS_OUT_L (29h), PRESS_OUT_H (2Ah) and TEMP_OUT_L

(2Bh), TEMP_OUT_H (2Ch) are stored in the FIFO until it is overwritten.

To reset FIFO content, in Bypass mode the value '000' must be written in FIFO_CTRL

(14h)(FMODE2:0). After this reset command, it is possible to restart FIFO mode, writing the

value '001' in FIFO_CTRL (14h)(FMODE2:0).

FIFO buffer memorizes 32 levels of data but the depth of the FIFO can be resized by setting

the CTRL_REG2 (11h)(STOP_ON_FTH) bit. If the STOP_ON_FTH bit is set to '1', FIFO

depth is limited to FIFO_CTRL (14h)(WTM4:0) + 1 data.

A FIFO threshold interrupt can be enabled (F_OVR bit in CTRL_REG3 (12h) in order to be

raised when the FIFO is filled to the level specified by the WTM4:0 bits of FIFO_CTRL

(14h). When a FIFO threshold interrupt occurs, the first data has been overwritten and the

FIFO stops collecting data from the input pressure and temperature.

Figure 8. FIFO mode

LPS22HBTR Datasheet(PDF) 18 Page - STMicroelectronics