AK09918 Datasheet, PDF (2/30 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK09918]
3. Table of Contents
1. General Description .................................................................................................................. 1
2. Features ..................................................................................................................................... 1
3. Table of Contents ...................................................................................................................... 2
4. Block Diagram and Functions................................................................................................... 3
5. Pin Configurations and Functions ............................................................................................. 4
6. Absolute Maximum Ratings...................................................................................................... 4
7. Recommended Operating Conditions ....................................................................................... 4
8. Electrical Characteristics........................................................................................................... 5
8.1. DC Characteristics.............................................................................................................. 5
8.2. AC Characteristics .............................................................................................................. 6
8.3. Analog Circuit Characteristics............................................................................................ 6
8.4. I²C Bus Interface ................................................................................................................ 7
9. Function Descriptions ............................................................................................................... 8
9.1. Power States ....................................................................................................................... 8
9.2. Reset Functions .................................................................................................................. 8
9.3. Operation Modes ................................................................................................................ 9
9.4. Description of Each Operation Mode............................................................................... 10
9.4.1. Power-down Mode .................................................................................................... 10
9.4.2. Single Measurement Mode ........................................................................................ 10
9.4.3. Continuous Measurement Mode 1, 2, 3 and 4 ........................................................... 11
9.4.4. Self-test Mode............................................................................................................ 15
10. Serial Interface ...................................................................................................................... 16
10.1. I²C Bus Interface ............................................................................................................ 16
10.1.1. Data Transfer ........................................................................................................... 16
10.1.2. WRITE Instruction .................................................................................................. 18
10.1.3. READ Instruction .................................................................................................... 19
11. Registers ................................................................................................................................ 20
11.1. Description of Registers ................................................................................................. 20
11.2. Register Map .................................................................................................................. 21
11.3. Detailed Description of Register .................................................................................... 22
11.3.1. WIA: Who I Am ...................................................................................................... 22
11.3.2. RSV: Reserved register ............................................................................................ 22
11.3.3. ST1: Status 1............................................................................................................ 22
11.3.4. HXL to HZH: Measurement data ............................................................................ 23
11.3.5. TMPS: Dummy register........................................................................................... 23
11.3.6. ST2: Status 2............................................................................................................ 24
11.3.7. CNTL1: Dummy register......................................................................................... 24
11.3.8. CNTL2: Control 2.................................................................................................... 24
11.3.9. CNTL3: Control 3.................................................................................................... 25
11.3.10. TS1, TS2: Test register........................................................................................... 25
12. Example of Recommended External Connection ................................................................. 26
13. Package ................................................................................................................................. 27
13.1. Marking .......................................................................................................................... 27
13.2. Pin Assignment............................................................................................................... 27
13.3. Outline Dimensions ........................................................................................................ 28
13.4. Recommended Foot Print Pattern................................................................................... 28
14. Relationship between the Magnetic Field and Output Code ................................................. 29
IMPORTANT NOTICE .............................................................................................................. 30
016014242-E-00
-2-
2016/11