AK09915 AK09915 3-axis Electronic Compass 1. General Description AK09915 is 3-axis electronic compass IC with high sensitive Hall sensor technology. Small package of AK09915 incorporates magnetic sensors for detecting terrestrial magnetism in the X-axis, Y-axis, and Z-axis, a sensor driving circuit, signal amplifier chain, and an arithmetic circuit for processing the signal from each sensor. Self-test function is also incorporated. From its compact foot print and thin package feature, it is suitable for map heading up purpose in GPS-equipped smart phone and tablet to realize pedestrian navigation function. 2. Features Functions: 3-axis magnetometer device suitable for compass application Built-in A to D Converter for magnetometer data out 16-bit data out for each 3-axis magnetic component Sensitivity: 0.15 T/LSB (typ.) Serial interface 2 I C bus interface 2 Standard, Fast and High-speed modes (up to 2.5 MHz) compliant with Philips I C specification Ver.2.1 4-wire SPI Operation mode Power-down, Single measurement, Continuous measurement and Self-test DRDY function for measurement data ready Magnetic sensor overflow monitor function Built-in oscillator for internal clock source Power on Reset circuit Self-test function with internal magnetic source Built-in Noise Suppression Filter (NSF) Selectable sensor drive Low power drive / Low noise drive Built-in magnetic sensitivity adjustment circuit 32 FIFO data buffer Operating temperatures: -30C to +85C Operating supply voltage: Analog power supply +1.7V to +3.6V Digital Interface supply +1.65V to analog power supply voltage Current consumption: Power-down: 3 A (typ.) Measurement: Average current consumption at 100 Hz repetition rate Low power drive: 0.9 mA (typ.) Low noise drive: 1.8 mA (typ.) Package: AK09915C 14-pin WL-CSP (BGA): 1.6 mm 1.6 mm 0.5 mm (typ.) 015006484-E-02 2016/7 - 1 - AK09915 3. Table of Contents 1. General Description ...................................................................................................................................1 2. Features ......................................................................................................................................................1 3. Table of Contents .......................................................................................................................................2 4. Block Diagram and Functions ....................................................................................................................4 5. Pin Configurations and Functions ..............................................................................................................5 6. Absolute Maximum Ratings.......................................................................................................................6 7. Recommended Operating Conditions ........................................................................................................6 8. Electrical Characteristics ...........................................................................................................................6 8.1. DC Characteristics ..............................................................................................................................6 8.2. AC Characteristics ..............................................................................................................................7 8.3. Analog Circuit Characteristics ............................................................................................................8 8.4. 4-wire SPI ............................................................................................................................................9 2 8.5. I C Bus Interface ...............................................................................................................................10 9. Functional Descriptions ...........................................................................................................................13 9.1. Power States ......................................................................................................................................13 9.2. Reset Functions .................................................................................................................................13 9.3. Operation Modes ...............................................................................................................................14 9.4. Description of Each Operation Mode ...............................................................................................15 9.4.1. Power-down Mode ....................................................................................................................15 9.4.2. Single Measurement Mode ........................................................................................................15 9.4.3. Continuous Measurement Mode 1, 2, 3, 4, 5 and 6 ...................................................................16 9.4.4. Self-test Mode ...........................................................................................................................19 9.5. Noise Suppression Filter (NSF) ........................................................................................................19 9.6. Sensor Drive Select ...........................................................................................................................19 9.7. FIFO ..................................................................................................................................................20 9.7.1. Watermark .................................................................................................................................20 10. Serial Interface ......................................................................................................................................21 10.1. 4-wire SPI ..........................................................................................................................................21 10.1.1. Writing Data ..............................................................................................................................21 10.1.2. Reading Data .............................................................................................................................22 2 10.2. I C Bus Interface ...............................................................................................................................22 10.2.1. Data Transfer .............................................................................................................................22 10.2.2. WRITE Instruction ....................................................................................................................25 10.2.3. READ Instruction ......................................................................................................................25 10.2.4. High-speed Mode (Hs-mode) ....................................................................................................27 11. Registers ................................................................................................................................................28 11.1. Description of Registers ....................................................................................................................28 11.2. Register Map .....................................................................................................................................29 11.3. Detailed Description of Registers .....................................................................................................30 11.3.1. WIA: Who I Am ........................................................................................................................30 11.3.2. RSV: Reserved ..........................................................................................................................30 11.3.3. INFO: Information .....................................................................................................................30 11.3.4. ST1: Status 1 .............................................................................................................................30 11.3.5. HXL to HZH: Measurement magnetic data ..............................................................................31 11.3.6. TMPS: Dummy ..........................................................................................................................32 11.3.7. ST2: Status 2 .............................................................................................................................32 11.3.8. CNTL1: Control 1 .....................................................................................................................33 11.3.9. CNTL2: Control 2 .....................................................................................................................34 11.3.10. CNTL3: Control 3 .....................................................................................................................34 11.3.11. TS1, TS2, TS3: Test ..................................................................................................................35 2 11.3.12. I2CDIS: I C Disable ..................................................................................................................35 015006484-E-02 2016/7 - 2 -