LSM9DS0 Datasheet, PDF(27/74 Page) STMicroelectronics – iNEMO inertial module 3D accelerometer, 3D gyroscope, 3D magnetometer

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LSM9DS0 Datasheet, PDF (27/74 Pages) STMicroelectronics – iNEMO inertial module 3D accelerometer, 3D gyroscope, 3D magnetometer

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LSM9DS0

Functionality

4.3.5

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 (30h) events) the FIFO starts operating in Stream

mode. Refer to Figure 9 below.

xi,yi,zi

Empty

Figure 9. Bypass-to-stream mode

x31

y31

z31

xi,yi,zi

x30

y30

z30

x31

y31

z31

4.3.6

Bypass mode

Stream mode

Trigger event

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Stream-to-FIFO mode

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

FIFO. A watermark interrupt can be enabled on pin DRDY_G by setting the I2_WTM bit in

CTRL_REG3_G (22h) to be raised when the FIFO is filled to the level specified in the

WTM4:0 bits of FIFO_CTRL_REG_G (2Eh). 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 (30h) events), the FIFO

starts operating in FIFO mode. Refer to Figure 10.

Figure 10. Stream-to-FIFO mode

xi,yi,zi

x30

y30

z30

x31

y31

z31

xi,yi,zi

x31

y31

z31

Stream Mode

Trigger event

FIFO Mode

DocID024763 Rev 2

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