ASM330LHB datasheet(41/131 Pages) STMICROELECTRONICS

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9.3

FIFO_CTRL1 (07h)

FIFO control register 1 (R/W)

Table 24. FIFO_CTRL1 register

WTM7

WTM6

WTM5

WTM4

WTM3

WTM2

WTM1

WTM0

Table 25. 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 26. FIFO_CTRL2 register

STOP_ON

_WTM

0(1)

ODRCHG

_EN

0(1)

WTM8

1. This bit must be set to 0 for the correct operation of the device.

Table 27. FIFO_CTRL2 register

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 the threshold level, defined in FIFO_CTRL1 (07h) and FIFO_CTRL2 (08h)

ODRCHG_EN

Enables ODR CHANGE virtual sensor to be batched in FIFO

WTM8

FIFO watermark threshold, in conjunction with WTM[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 FIFO is greater than or equal to the threshold

level.

ASM330LHB

FIFO_CTRL1 (07h)

DS13773 - Rev 7

page 41/131

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