LSM330D datasheet(22/66 Pages) STMICROELECTRONICS

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Functionality

LSM330D

22/66

Doc ID 022562 Rev 2

4.1.8

Stream mode

In Stream mode, data from X, Y and Z measurement are stored into the FIFO. A watermark

interrupt can be enabled and set as in FIFO mode.The FIFO continues filling until it is full (32

slots of data for X, Y and Z). When full, the FIFO discards the older data as the new data

arrives.

4.1.9

Stream-to-FIFO mode

In Stream-to-FIFO mode, data from X, Y and Z measurement is stored in the FIFO. A

watermark interrupt can be enabled (FIFO_WTMK_EN bit in the FIFO_CTRL_REG_A

FIFO_WTMK_LEVEL bits of the FIFO_CTRL_REG_A register. The FIFO continues filling

until it is full (32 slots of 8 -bit data for X, Y and Z). When full, the FIFO discards the older

data as the data new arrives. Once trigger event occurs, the FIFO starts operating in FIFO

mode.

4.1.10

Retrieve data from FIFO

FIFO data is read through OUT_X_L_A, OUT_X_H_A, OUT_Y_L_A, OUT_Y_H_A and

OUT_Z_L _A, OUT_Z_H_A. When the FIFO is in Stream, Trigger or FIFO mode, a read

operation to the OUT_X_L_A, OUT_X_H_A, OUT_Y_L_A, OUT_Y_H_A or OUT_Z_L _A,

OUT_Z_H_A registers provides the data stored in the FIFO. Each time data is read from the

FIFO, the oldest X, Y and Z data are placed in the OUT_X_L_A, OUT_X_H_A,

OUT_Y_L_A, OUT_Y_H_A and OUT_Z_L _A, OUT_Z_H_A registers and both single read

and read_burst operations can be used.

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