AK8973 查看數據表（PDF） - Asahi Kasei Microdevices

零件编号

产品描述 (功能)

生产厂家

AK8973

3-axis Electronic Compass

Asahi Kasei Microdevices 

ASAHI KASEI

6. Functional Explanation

6.1. Operation Modes

AK8973 has following three operation modes:

(1) Power-down mode

(2) Sensor measurement mode

(3) EEPROM access mode

By setting MS1 register MODE[1:0] bits, the operation set for each mode is started.

A transition from one mode to another is shown below.

1) Power input VDD

2) Resetting with RSTN pin

(1) Power-down

mode

MODE[1:0]=00

MODE[1:0]=11

(2) Sensor measurement mode

(normal operation)

Set measurement

condition.

On measurement

completion, transitons to

the power-down mode

automatically.

MODE[1:0]=10

MODE[1:0]=11

(3) EEPROM access mode

[AK8973]

After turning on the power, perform a reset operation by applying "L" to RSTN pin. Then AK8973 is set to

power-down mode.

A transition to mode (2) or (3) can be made only from power-down mode. A transition to a mode (2) or (3)

must be made through the power-down mode. To make the mode transition, write the setting data into the

MODE[1:0] shown in the transition diagram. After power-down mode is set, at least 100μs(Twat) is needed

before setting another mode.

Be sure to write a measurement condition for sensor measurement mode during the power-down mode.

Write-only registers MS1 and read-only registers can be accessed in any of the modes above.

MS0561-E-01 <Preliminary>

- 11 -

2007/01

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