LPS22HB datasheet(19/49 Pages) STMICROELECTRONICS

Part #	LPS22HB

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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19 / 49 page

DocID027083 Rev 5

19/49

LPS22HB

FIFO

5.3

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 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 9. 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.

LPS22HB Datasheet(PDF) 19 Page - STMicroelectronics