LSM330D datasheet(28/66 Pages) STMICROELECTRONICS

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Functionality

LSM330D

28/66

Doc ID 022562 Rev 2

Figure 10.

Trigger stream mode

4.3.6

Retrieve data from FIFO

FIFO data is read through OUT_X_L_G, OUT_X_H_G, OUT_Y_L_G, OUT_Y_H_G and

OUT_Z_L_G, OUT_Z_H_G. When the FIFO is in Stream, Trigger or FIFO mode, a read

operation to the OUT_X_L_G, OUT_X_H_G, OUT_Y_L_G, OUT_Y_H_G or OUT_Z_L_G,

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

FIFO, the oldest pitch, roll and yaw data are placed in the OUT_X_L_G, OUT_X_H_G,

OUT_Y_L_G, OUT_Y_H_G and OUT_Z_L_G, OUT_Z_H_G registers and both single read

and read_burst (X,Y & Z with autoincremental address) operations can be used. When data

included in OUT_Z_H_G is read, the system again starts to read information from addr

OUT_X_L _G.

4.4

Level-sensitive / Edge-sensitive data enable

The LSM330D allows external trigger level recognition through the enabling of the EXTRen

and LVLen bits in the CTRL_REG2_G register. Two different modes can be used: level-

sensitive or Edge-sensitive trigger.

x31

y31

z31

xi,yi,zi

Stream Mode

FIFO Mode

Trigger event

x31

y31

z31

xi,yi,zi

x30

y30

z30

AM07236v1

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