HMC5883L 데이터 시트보기 (PDF) - Honeywell International

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HMC5883L

HMC5883L / 3-Axis Digital Compass IC

Honeywell International 

HMC5883L

Configuration Register B

The configuration register B for setting the device gain. CRB0 through CRB7 indicate bit locations, with CRB denoting the

bits that are in the configuration register. CRB7 denotes the first bit of the data stream. The number in parenthesis

indicates the default value of that bit.

CRB7

GN2 (0)

CRB6

GN1 (0)

CRB5 CRB4 CRB3 CRB2

GN0 (1) (0)

(0)

(0)

Table 7: Configuration B Register

CRB1

(0)

CRB0

(0)

Location

Name

Description

CRB7 to CRB5

Gain Configuration Bits. These bits configure the gain for

GN2 to GN0 the device. The gain configuration is common for all

channels.

CRB4 to CRB0 0

These bits must be cleared for correct operation.

Table 8: Configuration Register B Bit Designations

The table below shows nominal gain settings. Use the “Gain” column to convert counts to Gauss. Choose a lower gain

value (higher GN#) when total field strength causes overflow in one of the data output registers (saturation).

GN2

GN1

GN0

Recommended

Sensor Field Range

Gain

(LSB/

Gauss)

0

0

0

± 0.88 Ga

1370

0

0

1

± 1.3 Ga

1090 (default)

0

1

0

± 1.9 Ga

820

0

1

1

± 2.5 Ga

660

1

0

0

± 4.0 Ga

440

1

0

1

± 4.7 Ga

390

1

1

0

± 5.6 Ga

330

1

1

1

± 8.1 Ga

230

Table 9: Gain Settings

Output Range

0xF800–0x07FF

(-2048–2047 )

0xF800–0x07FF

(-2048–2047 )

0xF800–0x07FF

(-2048–2047 )

0xF800–0x07FF

(-2048–2047 )

0xF800–0x07FF

(-2048–2047 )

0xF800–0x07FF

(-2048–2047 )

0xF800–0x07FF

(-2048–2047 )

0xF800–0x07FF

(-2048–2047 )

12

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