LPS33HW datasheet(18/50 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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18 / 50 page

FIFO

LPS33HW

18/50

DocID030522 Rev 1

4.3

Stream mode

Stream mode (FIFO_CTRL (14h)(FMODE2:0) = 010) provides continuous FIFO update: as

new data arrive, the older is discarded.

Once the entire FIFO has been read, the last data read still remains in the FIFO and hence

once a new sample is acquired, the FIFO_STATUS (26h)(FSS5:0) value rises from 0 to 2.

An overrun interrupt can be enabled, CTRL_REG3 (12h)(F_OVR) = '1', in order to inform

when the FIFO is full and eventually read its content all at once. If an overrun occurs, the

oldest sample in FIFO is overwritten, so if the FIFO was empty, the lost sample has already

been read.

Figure 8. Stream mode

In the latter case reading all FIFO content before an overrun interrupt has occurred, the first

data read is equal to the last already read in the previous burst, so the number of new data

available in FIFO depends on the previous reading.

LPS33HW Datasheet(PDF) 18 Page - STMicroelectronics