LPS22DF datasheet(38/54 Pages) STMICROELECTRONICS

38 / 54 page

Figure 23. Interrupt events on INT pin

New data set is available

FIFO Threshold (Watermark)

FIFO Overrun

FIFO Full

Pressure higher than threshold

Pressure lower than threshold

PHE

PLE

INT_EN

INT_F_FULL

INT_F_OVR

INT_F_WTM

DRDY

DRDY_PLS

INT Pin

CTRL_REG4 (13h)

INTERRUPT_CFG

(0Bh)

9.10

FIFO_CTRL (14h)

FIFO control register (R/W)

STOP_ON_WTM

TRIG_MODES

F_MODE1

F_MODE0

STOP_ON_WTM

Stop-on-FIFO watermark. Enables FIFO watermark level use. Default value: 0

(0: disable; 1: enable)

TRIG_MODES

Enables triggered FIFO modes. Default value: 0

F_MODE[1:0]

Selects triggered FIFO modes. Default value: 00

Refer to Table 21.

Table 21. FIFO mode selection

TRIG_MODES

F_MODE[1:]

Mode

Bypass

FIFO mode

Continuous (Dynamic-Stream)

Bypass-to-FIFO

Bypass-to-Continuous (Dynamic-Stream)

Continuous (Dynamic-Stream)-to-FIFO

The STOP_ON_WTM bit enables the use of the FIFO watermark level: when the number of samples in FIFO is

equal to the watermark level (set using the WTM[6:0] bits in FIFO_WTM (15h)) then FIFO is full.

The TRIG_MODES bit enables the triggered FIFO modes.

The F_MODE[1:0] bits select one of the FIFO modes, as described in Table 21.

Output pressure data are read through FIFO_DATA_OUT_PRESS_XL (78h), FIFO_DATA_OUT_PRESS_L (79h)

and FIFO_DATA_OUT_PRESS_H (7Ah); both single read and multiple read operations can be used.

LPS22DF

FIFO_CTRL (14h)

DS13316 - Rev 1

page 38/54

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