L3GD20 查看數據表（PDF） - STMicroelectronics

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L3GD20

MEMS motion sensor: three-axis digital output gyroscope

STMicroelectronics 

L3GD20

7

Register description

Register description

The device contains a set of registers which are used to control its behavior and to retrieve

angular rate data. The register address, consisting of 7 bits, is used to identify them and to

write the data through the serial interface.

7.1

WHO_AM_I (0Fh)

Table 17. WHO_AM_I register

1

1

0

1

0

1

0

0

Device identification register.

7.2

CTRL_REG1 (20h)

Table 18. CTRL_REG1 register

DR1

DR0

BW1

BW0

PD

Zen

Xen

Yen

Table 19.

DR1-DR0

BW1-BW0

CTRL_REG1 description

Output data rate selection. Refer to Table 20

Bandwidth selection. Refer to Table 20

Power-down mode enable. Default value: 0

PD

(0: power-down mode, 1: normal mode or sleep mode)

Zen

Z axis enable. Default value: 1

(0: Z axis disabled; 1: Z axis enabled)

Yen

Y axis enable. Default value: 1

(0: Y axis disabled; 1: Y axis enabled)

Xen

X axis enable. Default value: 1

(0: X axis disabled; 1: X axis enabled)

DR<1:0> is used for ODR selection. BW <1:0> is used for Bandwidth selection.

In the Table 20 all frequencies resulting in combinations of DR / BW bits are reported.

Table 20. DR and BW configuration setting

DR <1:0>

BW <1:0>

00

00

95

00

01

95

00

10

95

ODR [Hz]

Cut-Off

12.5

25

25

Doc ID 022116 Rev 1

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