LSM330DLCTR datasheet(22/66 Pages) STMICROELECTRONICS

22 / 66 page

Functionality

LSM330DLC

22/66

Doc ID 022162 Rev 2

4.2.5

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.

4.2.6

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.

4.3

Gyroscope digital main blocks

Figure 5.

Gyroscope block diagram

ADC

LPF1

HPF

HPen

LPF2

Out_Sel

DataReg

Interrupt

generator

INT_Sel

I2C

SPI

INT1

SCR REG

CONF REG

FIFO

32x16x3

AM07230v1

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