LPS27HHTW datasheet(40/55 Pages) STMICROELECTRONICS

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9.9

FIFO_CTRL (13h)

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 22.

Table 22. FIFO mode selection

TRIG_MODES

F_MODE[1:0]

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[4:0] bits in FIFO_WTM (14h)) 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 22.

Output data (pressure and temperature) are read through FIFO_DATA_OUT_PRESS_XL (78h),

FIFO_DATA_OUT_PRESS_L (79h), FIFO_DATA_OUT_PRESS_H (7Ah),FIFO_DATA_OUT_TEMP_L (7Bh) and

FIFO_DATA_OUT_TEMP_H (7Ch); both single read and multiple read operations can be used.

9.10

FIFO_WTM (14h)

FIFO threshold setting register (R/W)

WTM6

WTM5

WTM4

WTM3

WTM2

WTM1

WTM0

WTM[6:0]

FIFO threshold. Watermark level setting. Default value: 0000000

LPS27HHTW

FIFO_CTRL (13h)

DS13489 - Rev 1

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