LSM6DSO datasheet(44/172 Pages) STMICROELECTRONICS

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9.3

FIFO_CTRL1 (07h)

FIFO control register 1 (r/w)

Table 25. FIFO_CTRL1 register

WTM7

WTM6

WTM5

WTM4

WTM3

WTM2

WTM1

WTM0

Table 26. FIFO_CTRL1 register description

WTM[7:0]

FIFO watermark threshold, in conjunction with WTM8 in FIFO_CTRL2 (08h)

1 LSB = 1 sensor (6 bytes) + TAG (1 byte) written in FIFO

Watermark flag rises when the number of bytes written in the FIFO is greater than or equal to the threshold level.

9.4

FIFO_CTRL2 (08h)

FIFO control register 2 (r/w)

Table 27. FIFO_CTRL2 register

STOP_ON

_WTM

FIFO_

COMPR_

RT_EN

ODRCHG

_EN

UNCOPTR_

RATE_1

UNCOPTR_

RATE_0

WTM8

Table 28. FIFO_CTRL2 register description

STOP_ON_WTM

Sensing chain FIFO stop values memorization at threshold level

(0: FIFO depth is not limited (default);

1: FIFO depth is limited to threshold level, defined in FIFO_CTRL1 (07h) and FIFO_CTRL2 (08h))

FIFO_COMPR_RT_EN(1) Enables/Disables compression algorithm runtime

ODRCHG_EN

Enables ODR CHANGE virtual sensor to be batched in FIFO

UNCOPTR_RATE_[1:0]

This field configures the compression algorithm to write non-compressed data at each rate.

(0: Non-compressed data writing is not forced;

1: Non-compressed data every 8 batch data rate;

2: Non-compressed data every 16 batch data rate;

3: Non-compressed data every 32 batch data rate)

WTM8

FIFO watermark threshold, in conjunction with WTM_FIFO[7:0] in FIFO_CTRL1 (07h)

1 LSB = 1 sensor (6 bytes) + TAG (1 byte) written in FIFO

Watermark flag rises when the number of bytes written in the FIFO is greater than or equal to the

threshold level.

1. This bit is effective if the FIFO_COMPR_EN bit of EMB_FUNC_EN_B (05h) is set to 1.

LSM6DSO

FIFO_CTRL1 (07h)

DS12140 - Rev 2

page 44/172

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