LPS33HW datasheet(19/50 Pages) STMICROELECTRONICS

Part #	LPS33HW

Description	MEMS pressure sensor: 260-1260 hPa absolute digital output barometer with water-resistant package

PDF	50 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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19 / 50 page

DocID030522 Rev 1

19/50

LPS33HW

FIFO

4.4

Dynamic-Stream mode

In Dynamic-Stream mode (FIFO_CTRL (14h)(FMODE2:0) = 110) after emptying the FIFO,

the first new sample that arrives becomes the first to be read in a subsequent read burst. In

this way the number of new data available in FIFO does not depend on the previous

reading.

In Dynamic-Stream mode FIFO_STATUS (26h)(FSS5:0) is the number of new pressure and

temperature samples available in the FIFO buffer.

Stream Mode is intended to be used to read all 32 samples of FIFO within an ODR after

receiving an overrun signal.

Dynamic-Stream is intended to be used to read FIFO_STATUS (26h)(FSS5:0) samples

when it is not possible to guarantee reading data within an ODR.

Also, a FIFO threshold interrupt on the INT_DRDY pad through CTRL_REG3 (12h)(F_FTH)

can be enabled in order to read data from the FIFO and leave free memory slots for

incoming data.

Figure 9. Dynamic-Stream mode

LPS33HW Datasheet(PDF) 19 Page - STMicroelectronics