L3G4200D datasheet(17/42 Pages) STMICROELECTRONICS

Part #	L3G4200D

Description	MEMS motion sensor: ultra-stable three-axis digital output gyroscope

PDF	42 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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L3G4200D

Main digital blocks

Doc ID 17116 Rev 3

17/42

Figure 7.

Bypass mode

3.2.2

FIFO mode

In FIFO mode, data from the yaw, pitch, and roll channels are stored in the FIFO. A

watermark interrupt can be enabled (I2_WMK bit in CTRL_REG3), which is triggered when

the FIFO is filled to the level specified in the WTM 4:0 bits of FIFO_CTRL_REG. The FIFO

continues filling until it is full (32 slots of 16-bit data for yaw, pitch, and roll). When full, the

FIFO stops collecting data from the input channels. To restart data collection, it is necessary

to write FIFO_CTRL_REG back to bypass mode.

FIFO mode is represented in

Figure 8.

FIFO mode

3.2.3

Stream mode

In stream mode, data from yaw, pitch, and roll measurements are stored in the FIFO. A

watermark interrupt can be enabled and set as in FIFO mode. The FIFO continues filling

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

L3G4200D Datasheet(PDF) 17 Page - STMicroelectronics