Huawei U8860 Maintenance Manual page 72

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U8860

Maintenance Manual

Signal

I2C_SDA_HW

COMPASS_INT

The compass is a three-axis-Hall sensor. Because of the earth's magnetic field, the chip

generates electricity components on the three axes. After three components are processed

inside the chip, the direction of the earth's magnetic field relative to the chip is obtained.

Through the I2C bus, the chip communicates with the main chip. Through data processing,

the main chip can obtain the relationship of the earth's magnetic field direction and the phone

position.

When the compass is operating, the compass direction variation is reported to the main chip,

but in the map program, the compass direction is related to GPS. As a result, the unstable GPS

signal may cause compass direction error.

Troubleshooting process:

Failure: Relevant functions of the compass are disabled.

Solution:

The compass direction has a

Are the components on the sensor's

power supply circuit and control circuit

Issue 1.0 (2011-11-14)

great deviation.

Is the problem solved after the

software is loaded?

Is the problem solved after the

sensor is replaced?

damaged or short-circuited?

Huawei Proprietary and Confidential

Description

Compass interrupt signal

9 Principles and Troubleshooting

End

Table of Contents

Troubleshooting