AK8963C Datasheet, PDF (3/38 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK8963]
3. Table of Contents
1. Features ...................................................................................................................................... 1
2. Overview ..................................................................................................................................... 2
3. Table of Contents ........................................................................................................................ 3
4. Circuit Configuration.................................................................................................................... 5
4.1. Block Diagram...................................................................................................................... 5
4.2. Block Function ..................................................................................................................... 5
4.3. Pin Function ......................................................................................................................... 6
5. Overall Characteristics ................................................................................................................ 7
5.1. Absolute Maximum Ratings ................................................................................................. 7
5.2. Recommended Operating Conditions ................................................................................. 7
5.3. Electrical Characteristics ..................................................................................................... 7
5.3.1. DC Characteristics........................................................................................................ 7
5.3.2. AC Characteristics ........................................................................................................ 8
5.3.3. Analog Circuit Characteristics ...................................................................................... 9
5.3.4. 4-wire SPI ................................................................................................................... 10
5.3.5. I²C Bus Interface..........................................................................................................11
6. Functional Explanation.............................................................................................................. 12
6.1. Power States ...................................................................................................................... 12
6.2. Reset Functions ................................................................................................................. 12
6.3. Operation Modes ............................................................................................................... 13
6.4. Description of Each Operation Mode................................................................................. 14
6.4.1. Power-down Mode...................................................................................................... 14
6.4.2. Single Measurement Mode ........................................................................................ 14
6.4.3. Continuous Measurement Mode 1 and 2 ................................................................... 15
6.4.3.1. Data Ready.......................................................................................................... 15
6.4.3.2. Normal Read Sequence...................................................................................... 15
6.4.3.3. Data Read Start During Measurement................................................................ 16
6.4.3.4. Data Skip ............................................................................................................. 17
6.4.3.5. End Operation ..................................................................................................... 17
6.4.3.6. Magnetic Sensor Overflow .................................................................................. 18
6.4.4. External Trigger Measurement Mode ......................................................................... 18
6.4.5. Self-test Mode............................................................................................................. 19
6.4.6. Fuse ROM Access Mode............................................................................................ 19
7. Serial Interface .......................................................................................................................... 20
7.1. 4-wire SPI .......................................................................................................................... 20
7.1.1. Writing Data ................................................................................................................ 20
7.1.2. Reading Data.............................................................................................................. 21
7.2. I²C Bus Interface................................................................................................................ 22
7.2.1. Data Transfer .............................................................................................................. 22
7.2.1.1. Change of Data ................................................................................................... 22
7.2.1.2. Start/Stop Condition............................................................................................. 22
7.2.1.3. Acknowledge ....................................................................................................... 23
7.2.1.4. Slave Address ..................................................................................................... 23
7.2.2. WRITE Instruction ...................................................................................................... 24
7.2.3. READ Instruction ........................................................................................................ 25
7.2.3.1. One Byte READ .................................................................................................. 25
7.2.3.2. Multiple Byte READ............................................................................................. 25
8. Registers ................................................................................................................................... 26
8.1. Description of Registers..................................................................................................... 26
8.2. Register Map...................................................................................................................... 27
8.3. Detailed Description of Registers ...................................................................................... 28
8.3.1. WIA: Device ID ........................................................................................................... 28
8.3.2. INFO: Information ....................................................................................................... 28
8.3.3. ST1: Status 1 .............................................................................................................. 28
8.3.4. HXL to HZH: Measurement Data................................................................................ 29
8.3.5. ST2: Status 2 .............................................................................................................. 30
8.3.6. CNTL1: Control1......................................................................................................... 30
MS1356-E-02
-3-
2013/10