LSM330DLC datasheet(26/66 Pages) STMICROELECTRONICS

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Functionality

LSM330DLC

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Doc ID 022162 Rev 2

4.4.4

Bypass-to-stream mode

In Bypass-to-stream mode, the FIFO starts operating in Bypass mode and once a trigger

event occurs (related to INT1_CFG_G register events) the FIFO starts operating in Stream

mode. Refer to Figure 9 below.

Figure 9.

Bypass-to-stream mode

4.4.5

Stream-to-FIFO mode

In Stream-to-FIFO mode, data from yaw, pitch and roll measurement is stored in the FIFO. A

watermark interrupt can be enabled on pin DRDY/INT2 by setting the I2_WTM bit in

CTRL_REG3_G register to be raised when the FIFO is filled to the level specified in the

WTM4:0 bits of the FIFO_CTRL_REG_G register. The FIFO continues filling until it is full

(32 slots of 16-bit data for yaw, pitch and roll). When full, the FIFO discards the older data as

the new data arrives. Once a trigger event occurs (related to INT1_CFG_G register events),

the FIFO starts operating in FIFO mode. Refer to Figure 10: Trigger stream mode.

x31

y31

z31

xi,yi,zi

Empty

Bypass mode

Stream mode

Trigger event

x31

y31

z31

xi,yi,zi

x30

y30

z30

AM07235v1

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