[AK09911] AK09911 3-axis Electronic Compass 1. Features A 3-axis electronic compass IC with high sensitive Hall sensor technology. Best adapted to pedestrian city navigation use for cell phone and other portable appliance. Functions: 3-axis magnetometer device suitable for compass application Built-in A to D Converter for magnetometer data out 14-bit data out for each 3-axis magnetic component Sensitivity: 0.6 T/LSB (typ.) Serial interface I2C bus interface Standard, Fast and High-speed mode (up to 2.5 MHz) compliant with Philips I2C specification Ver.2.1 Operation mode Power-down, Single measurement, Continuous measurement, Self-test and Fuse ROM access 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 Operating temperatures: -30C to +85C Operating supply voltage: Analog power supply +2.4V 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: 2.4 mA (typ.) Package: AK09911C 8-pin WL-CSP (BGA): 1.2 mm x 1.2 mm x 0.5 mm (typ.) MS1526-E-01 2014/7 -1- [AK09911] 2. Overview AK09911 is 3-axis electronic compass IC with high sensitive Hall sensor technology. Small package of AK09911 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 cell phone to realize pedestrian navigation function. AK09911 has the following features: (1) Silicon monolithic Hall-effect magnetic sensor with magnetic concentrator realizes 3-axis magnetometer on a silicon chip. Analog circuit, digital logic, power block and interface block are also integrated on a chip. (2) Wide dynamic measurement range and high resolution with lower current consumption. Output data resolution: 14-bit (0.6 T/LSB) Measurement range: 4900 T Average current at 100 Hz repetition rate: 2.4 mA (typ.) (3) Digital serial interface I2C bus interface to control AK09911 functions and to read out the measured data by external CPU. A dedicated power supply for I2C bus interface can work in low-voltage apply as low as 1.65V. (4) DRDY register informs to system that measurement is end and set of data in registers are ready to be read. (5) Device is worked by on-chip oscillator so no external clock source is necessary. (6) Self test function with internal magnetic source to confirm magnetic sensor operation on end products. MS1526-E-01 2014/7 -2- [AK09911] 3. Table of Contents 1. Features ..............................................................................................................................1 2. Overview..............................................................................................................................2 3. Table of Contents.................................................................................................................3 4. Circuit Configration ..............................................................................................................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. I2C Bus Interface ..................................................................................................10 6. Function Explanation .........................................................................................................13 6.1. Power States ...............................................................................................................13 6.2. Reset Functions ..........................................................................................................13 6.3. Operation Mode ..........................................................................................................14 6.4. Description of Each Operation Mode .........................................................................15 6.4.1. Power-down Mode ...............................................................................................15 6.4.2. Single Measurement Mode ..................................................................................15 6.4.3. Continuous Measurement Mode 1, 2, 3 and 4 ....................................................16 6.4.4. Self-test Mode ......................................................................................................19 6.4.5. Fuse ROM Access Mode .....................................................................................19 7. Serial Interface ..................................................................................................................20 7.1. Data Transfer ..............................................................................................................20 7.1.1. Change of Data ....................................................................................................20 7.1.2. Start/Stop Condition .............................................................................................20 7.1.3. Acknowledge ........................................................................................................21 7.1.4. Slave Address ......................................................................................................21 7.2. WRITE Instruction.......................................................................................................22 7.3. READ Instruction ........................................................................................................23 7.3.1. One Byte READ ...................................................................................................23 7.3.2. Multiple Byte READ .............................................................................................23 7.4. High-speed Mode (Hs-mode) .....................................................................................24 8. Registers ...........................................................................................................................25 8.1. Description of Registers .............................................................................................25 8.2. Register Map ..............................................................................................................26 8.3. Detailed of Description of Register .............................................................................27 8.3.1. WIA: Who I Am .....................................................................................................27 8.3.2. INFO: Information ................................................................................................27 8.3.3. ST1: Status 1........................................................................................................27 8.3.4. HXL to HZH: Measurement data..........................................................................28 8.3.5. TMPS: Dummy Register ......................................................................................28 8.3.6. ST2: Status 2........................................................................................................29 8.3.7. CNTL1: Dummy Register .....................................................................................29 8.3.8. CNTL2: Control 2 .................................................................................................29 8.3.9. CNTL3: Control 3 .................................................................................................30 8.3.10. TS1: Test ............................................................................................................30 8.3.11. ASAX, ASAY, ASAZ: Sensitivity Adjustment Values...........................................30 9. Example of Recommended External Connection .............................................................31 10. Package...........................................................................................................................32 10.1. Marking .....................................................................................................................32 10.2. Pin Assignment .........................................................................................................32 10.3. Outline Dimensions ..................................................................................................33 MS1526-E-01 2014/7 -3- [AK09911] 10.4. Recommended Foot Print Pattern ............................................................................33 11. Relationsip between the Magnetic Field and Output Code .............................................34 MS1526-E-01 2014/7 -4- [AK09911] 4. Circuit Configration 4.1. Block Diagram 3-axis Hall sensor Chopper SW PreAMP IntegratorADC MUX OSC HE-Drive SCL Timing Control VREF Interface Logic & Register SDA RSTN Magnetic source POR TST CAD VSS VDD FUSE ROM VID 4.2. Block Function Block 3-axis Hall sensor MUX Chopper SW HE-Drive Pre-AMP Intergrator & ADC OSC POR VREF Interface Logic & Register Timing Control Magnetic Source FUSE ROM Function Monolithic Hall elements. Multiplexer for selecting Hall elements. Performs chopping. Magnetic sensor drive circuit for constant-current driving of sensor. Fixed-gain differential amplifier used to amplify the magnetic sensor signal. Integrates and amplifies pre-AMP output and performs analog-to-digital conversion. Generates an operating clock for sensor measurement. Power On Reset circuit. Generates reset signal on rising edge of VDD. Generates reference voltage and current. Exchanges data with an external CPU. I2C bus interface using two pins, namely, SCL and SDA. Standard, Fast and High-speed modes are supported. The low-voltage specification can be supported by applying 1.65V to the VID pin. Generates a timing signal required for internal operation from a clock generated by the OSC. Generates magnetic field for self test of magnetic sensor. Fuse for adjustment. MS1526-E-01 2014/7 -5- [AK09911] 4.3. Pin Function Pin No. Pin name I/O I Power supply VDD A1 A2 VDD CAD A3 Type Power CMOS TST I/O VDD CMOS B1 B3 VSS SCL I VID Power CMOS C1 C2 VID RSTN I VID Power CMOS C3 SDA I/O VID CMOS Function Positive power supply pin. Slave address input pin. Connect to VSS or VDD, Test pin. Pulled down by 100k internal resister. Keep this pin electrically non-connected. Ground pin. Control data clock input pin Input: Schmidt trigger Digital interface positive power supply pin. Reset pin. Resets registers by setting to "L". Control data input/output pin Input: Schmidt trigger, Output: Open drain MS1526-E-01 2014/7 -6- [AK09911] 5. Overall Characteristics 5.1. Absolute Maximum Ratings Vss=0V Parameter Power supply voltage (Vdd, Vid) Input voltage Input current Storage temperature (Note 1) Symbol V+ Min. -0.3 Max. +4.3 Unit V VIN IIN Tst -0.3 -40 V++0.3 10 +125 V mA C If the device is used in conditions exceeding these values, the device may be destroyed. Normal operations are not guaranteed in such exceeding conditions. 5.2. Recommended Operating Conditions Vss=0V Parameter Operating temperature Power supply voltage Remark VDD pin voltage VID pin voltage Symbol Ta Vdd Vid Min. -30 2.4 1.65 Typ. Max. +85 3.6 Vdd 3.0 Unit C V V 5.3. Electrical Characteristics The following conditions apply unless otherwise noted: Vdd=2.4V to 3.6V, Vid=1.65V to Vdd, Temperature range=-30C to 85C 5.3.1. DC Characteristics Parameter High level input voltage 1 Symbol VIH1 Low level input voltage 1 VIL1 High level input voltage 2 Low level input voltage 2 Input current 1 VIH2 VIL2 IIN1 Input current 2 Hysteresis input voltage (Note 2) IIN2 VHS Low level output voltage (Note 3) VOL Current consumption (Note 4) IDD1 IDD2 IDD3 IDD4 Pin RSTN SCL SDA RSTN SCL SDA TST CAD RSTN SCL SDA CAD TST SCL SDA SDA VDD VID Condition Vin=Vss or Vid Vin=Vss or Vdd Vin=Vdd Vid2V Vid<2V IOL+3mA Vid2V IOL+3mA Vid<2V Power-down mode Vdd=Vid=3.0V When magnetic sensor is driven Self-test mode (Note 5) MS1526-E-01 Min. 70%Vid 70%Vid Typ. Max. Vid+0.3 Unit V -0.3 30%Vid V 70%Vdd -0.3 -10 Vdd+0.3 30%Vdd +10 V V A -10 +10 100 5%Vid 10%Vid 0.4 A V V 20%Vid 3 6 A 3 6 mA 5 0.1 8 5 mA A 2014/7 -7- [AK09911] (Note 2) (Note 3) (Note 4) (Note 5) Schmitt trigger input (reference value for design) Output is open-drain. Connect a pull-up resistor externally. Maximum capacitive load: 400pF (Capacitive load of each bus line for I2C bus interface). Without any resistance load. It does not include the current consumed by external loads (pull-down resister, etc.). RSTN, SDA, SCL = Vid or 0V. CAD = Vdd or 0V. (case 1) Vdd=ON, Vid=ON, RSTN pin = "L". (case 2) Vdd=ON, Vid=OFF (0V), RSTN pin = "L". (case 3) Vdd=OFF (0V), Vid=ON. 5.3.2. AC Characteristics Parameter Power supply rise time (Note 6) POR completion time (Note 6) Power supply turn off voltage (Note 6) Power supply turn on interval (Note 6) Symbol PSUP Wait time before mode setting Twat (Note 6) (Note 7) Pin VDD VID PORT SDV PSINT VDD VID VDD VID Condition Period of time that VDD (VID) changes from 0.2V to Vdd (Vid). Period of time after PSUP to Power-down mode (Note 7) Turn off voltage to enable POR to restart (Note 7) Period of time that voltage lower than SDV needed to be kept to enable POR to restart (Note 7) Min. Typ. Max. 50 Unit ms 100 s 0.2 V 100 s 100 s Reference value for design. When POR circuit detects the rise of VDD/VID voltage, it resets internal circuits and initializes the registers. After reset, AK09911 transits to Power-down mode. Power-down mode Power-down mode VDD/(VID) PORT SDV 0V PSUP Parameter Reset input effective pulse width ("L") PSINT Symbol tRSTL Pin RSTN Condition Min. 5 Typ. Max. Unit s tRSTL VIL1 MS1526-E-01 2014/7 -8- [AK09911] 5.3.3. Analog Circuit Characteristics Parameter Measurement data output bit Time for measurement Magnetic sensor sensitivity (Note 8) Magnetic sensor measurement range (Note 9) Magnetic sensor initial offset (Note 10) Symbol DBIT TSM BSE BRG Condition Min. - Single measurement mode Tc = 25 C 0.57 Tc = 25 C 4912 Tc = 25 C -500 Typ. 14 7.2 0.6 Max. 8.5 0.63 Unit bit ms T/LSB T +500 LSB (Note 8) Value after sensitivity is adjusted using sensitivity fine adjustment data stored in Fuse ROM. (Note 9) Reference value for design (Note 10) Value of measurement data register on shipment without applying magnetic field on purpose. MS1526-E-01 2014/7 -9- [AK09911] 2 5.3.4. I C Bus Interface I2C bus interface is compliant with Standard mode, Fast mode and High-speed mode. Standard/Fast mode is selected automatically by fSCL. Standard mode fSCL100kHz Symbol fSCL tHIGH tLOW tR tF tHD:STA tSU:STA tHD:DAT tSU:DAT tSU:STO tBUF Parameter SCL clock frequency SCL clock "High" time SCL clock "Low" time SDA and SCL rise time SDA and SCL fall time Start Condition hold time Start Condition setup time SDA hold time (vs. SCL falling edge) SDA setup time (vs. SCL rising edge) Stop Condition setup time Bus free time Min. Typ. Max. 100 4.0 4.7 1.0 0.3 4.0 4.7 0 250 4.0 4.7 Unit kHz s s s s s s s ns s s Fast mode 100HzfSCL400kHz Symbol fSCL tHIGH tLOW tR tF tHD:STA tSU:STA tHD:DAT tSU:DAT tSU:STO tBUF tSP Parameter SCL clock frequency SCL clock "High" time SCL clock "Low" time SDA and SCL rise time SDA and SCL fall time Start Condition hold time Start Condition setup time SDA hold time (vs. SCL falling edge) SDA setup time (vs. SCL rising edge) Stop Condition setup time Bus free time Noise suppression pulse width Min. Typ. Max. 400 0.6 1.3 0.3 0.3 0.6 0.6 0 100 0.6 1.3 50 Unit kHz s s s s s s s ns s s ns [I2C bus interface timing] 1/fSCL VIH1 SCL VIL1 VIH1 SDA VIL1 tLOW tBUF tR tHIGH tF tSP VIH1 SCL VIL1 tHD:STA Stop Start tHD:DAT tSU:DAT tSU:STA tSU:STO Start Stop MS1526-E-01 2014/7 - 10 - [AK09911] High-speed mode (Hs-mode) Cb100pF (Cb: load capacitance) fSCLH2.5MHz Symbol fSCLH tHIGH tLOW tR_CL tR_CL1 tR_DA tF_CL tF_DA tHD:STA tSU:STA tHD:DAT tSU:DAT tSU:STO tSP Parameter SCLH clock frequency SCLH clock "High" time SCLH clock "Low" time SCLH rise time SCLH rise time after a repeated START condition and after an acknowledge bit SDAH rise time SCLH fall time SDAH fall time Start Condition hold time Start Condition setup time SDAH hold time (vs. SCLH falling edge) SDAH setup time (vs. SCLH rising edge) Stop Condition setup time Noise suppression pulse width Min. Parameter SCLH clock frequency SCLH clock "High" time SCLH clock "Low" time SCLH rise time SCLH rise time after a repeated START condition and after an acknowledge bit SDAH rise time SCLH fall time SDAH fall time Start Condition hold time Start Condition setup time SDAH hold time (vs. SCLH falling edge) SDAH setup time (vs. SCLH rising edge) Stop Condition setup time Noise suppression pulse width Min. Typ. Max. 2.5 110 220 10 40 Unit MHz ns ns ns 10 80 ns 10 160 160 0 10 160 80 40 80 ns ns ns ns ns ns ns ns ns 10 Cb400pF fSCLH1.7MHz Symbol fSCLH tHIGH tLOW tR_CL tR_CL1 tR_DA tF_CL tF_DA tHD:STA tSU:STA tHD:DAT tSU:DAT tSU:STO tSP MS1526-E-01 Typ. Max. 1.7 120 320 20 80 Unit MHz ns ns ns 20 160 ns 20 160 160 0 10 160 160 80 160 ns ns ns ns ns ns ns ns ns 10 2014/7 - 11 - [AK09911] [I2C bus interface timing of Hs-mode] 1/fSCLH VIH1 SCLH VIL1 START Tf_D START STOP Tr_D VIH1 SDAH VIL1 tSU;STA tHD;DAT tSU;STO tSU;DAT tHD;STA VIH1 SCLH VIL1 tf_CL tr_CL1 Tr_CL1 Tr_CL tHIGH tLOW tHIGH MS1526-E-01 2014/7 - 12 - [AK09911] 6. Function Explanation 6.1. Power States When VDD and VID are turned on from Vdd=OFF (0V) and Vid=OFF (0V), all registers in AK09911 are initialized by POR circuit and AK09911 transits to Power-down mode. All the states in the table below can be set, although the transition from state 2 to state 3 and the transition from state 3 to state 2 are prohibited. Table 6.1. Power state State 1 VDD OFF (0V) VID OFF (0V) 2 OFF (0V) 1.65V to 3.6V 3 2.4V to 3.6V OFF (0V) 4 2.4V to 3.6V 1.65V to Vdd Power state OFF (0V). It doesn't affect external interface.Digital input pins other than SCL and SDA pin should be fixed to "L"(0V). OFF (0V) It doesn't affect external interface. OFF(0V) It doesn't affect external interface. Digital input pins other than SCL and SDA pin should be fixed to "L"(0V). ON 6.2. Reset Functions When the power state is ON, always keep VidVdd. Power-on reset (POR) works until Vdd reaches to the operation effective voltage (about 1.1V: reference value for design) on power-on sequence. After POR is deactivated, all registers are initialized and transits to Power-down mode. When Vdd=2.4 to 3.6V, POR circuit and VID monitor circuit are active. When Vid=0V, AK09911 is in reset status and it consumes the current of reset state (IDD4). AK09911 has four types of reset; (1) Power on reset (POR) When Vdd rise is detected, POR circuit operates, and AK09911 is reset. (2) VID monitor When VID is turned OFF, AK09911 is reset. (3) Reset pin (RSTN) AK09911 is reset by Reset pin. When Reset pin is not used, connect to VID. (4) Soft reset AK09911 is reset by setting SRST bit. When AK09911 is reset, all registers are initialized and AK09911 transits to Power-down mode. MS1526-E-01 2014/7 - 13 - [AK09911] 6.3. Operation Mode AK09911 has following nine operation modes: (1) Power-down mode (2) Single measurement mode (3) Continuous measurement mode 1 (4) Continuous measurement mode 2 (5) Continuous measurement mode 3 (6) Continuous measurement mode 4 (7) Self-test mode (8) Fuse ROM access mode By setting CNTL2 register MODE[4:0] bits, the operation set for each mode is started. A transition from one mode to another is shown below. MODE[4:0]="00001" Power-down MODE[4:0]="00000" mode Transits automatically MODE[4:0]="00010" MODE[4:0]="00000" MODE[4:0]="00100" MODE[4:0]="00000" MODE[4:0]="00110" MODE[4:0]="00000" MODE[4:0]="01000" MODE[4:0]="00000" MODE[4:0]="10000" MODE[4:0]="00000" Single measurement mode Sensor is measured for one time and data is output. Transits to Power-down mode automatically after measurement ended. Continuous measurement mode 1 Sensor is measured periodically in 10Hz. Transits to Power-down mode by writing MODE[4:0] = "00000". Continuous measurement mode 2 Sensor is measured periodically in 20Hz. Transits to Power-down mode by writing MODE[4:0]="00000". Continuous measurement mode 3 Sensor is measured periodically in 50Hz. Transits to Power-down mode by writing MODE[4:0]="00000". Continuous measurement mode 4 Sensor is measured periodically in 100Hz. Transits to Power-down mode by writing MODE[4:0]="00000". Self-test mode Sensor is self-tested and the result is output. Transits to Power-down mode automatically. Transits automatically MODE[4:0]="11111" MODE[4:0]="00000" Fuse ROM access mode Turn on the needed to read out Fuse ROM. Transits to Power-down mode by writing MODE[4:0]="00000". Figure 6.1. Operation mode When power is turned ON, AK09911 is in Power-down mode. When a specified value is set to MODE[4:0], AK09911 transits to the specified mode and starts operation. When user wants to change operation mode, transit to Power-down mode first and then transit to other modes. After Power-down mode is set, at least 100 s (Twat) is needed before setting another mode MS1526-E-01 2014/7 - 14 - [AK09911] 6.4. Description of Each Operation Mode 6.4.1. Power-down Mode Power to almost all internal circuits is turned off. All registers are accessible in Power-down mode. Data stored in read/write registers are remained. They can be reset by soft reset. 6.4.2. Single Measurement Mode When Single measurement mode (MODE[4:0]="00001") is set, magnetic sensor measurement is started. After magnetic sensor measurement and signal processing is finished, measurement magnetic data is stored to measurement data registers (HXL to HZH), then AK09911 transits to Power-down mode automatically. On transition to Power-down mode, MODE[4:0] turns to "00000". At the same time, DRDY bit in ST1 register turnes to "1". This is called "Data Ready". When any of measurement data register (HXL to TMPS) or ST2 register is read, DRDY bit turnes to "0". It remains "1" on transition from Power-down mode to another mode. (Figure 6.2. ) When sensor is measuring (Measurement period), measurement data registers (HXL to TMPS) keep the previous data. Therefore, it is possible to read out data even in measurement period. Data read out in measurement period are previous data.(Figure 6.3. ) Operation Mode: Power-down Single measuremnet (1) (2) (3) Measurement period Measurement Data Register Last Data Measurement Data (1) Data(2) Data(3) DRDY Data read Data(1) Register Write MODE[4:0]="00001" Data(3) MODE[4:0]="00001" MODE[4:0]="00001" Figure 6.2. Single measurement mode when data is read out of measurement period Operation Mode: Power-down Single measuremnet (1) (2) (3) Measurement period Measurement Data Register Last Data Measurement Data (1) Data(3) DRDY Data read Register Write Data(1) MODE[4:0]="00001" MODE[4:0]="00001" MODE[4:0]="00001" Figure 6.3. Single measurement mode when data read started during measurement period MS1526-E-01 2014/7 - 15 - [AK09911] 6.4.3. Continuous Measurement Mode 1, 2, 3 and 4 When Continuous measurement mode 1 (MODE[4:0]="00010"), 2 (MODE[4:0]="00100"), 3 (MODE[4:0]="00110") or 4 (MODE[4:0]="01000") is set, magnetic sensor measurement is started periodically at 10 Hz, 20 Hz, 50 Hz or 100 Hz respectively. After magnetic sensor measurement and signal processing is finished, measurement magnetic data is stored to measurement data registers (HXL to HZH) and all circuits except for the minimum circuit required for counting cycle length are turned off (PD). When the next measurement timing comes, AK09911 wakes up automatically from PD and starts measurement again. Continuous measurement mode ends when Power-down mode (MODE[4:0]="00000") is set. It repeats measurement until Power-down mode is set. When Continuous measurement mode 1 (MODE[4:0]="00010"), 2 (MODE[4:0]="00100"), 3 (MODE[4:0]="00110") or 4 (MODE[4:0]="01000") is set again while AK09911 is already in Continuous measurement mode, a new measurement starts. ST1, ST2 and measurement data registers (HXL to TMPS) will not be initialized by this. (N-1)th PD Nth Measurement (N+1)th Measurement PD PD 10Hz,20Hz,50Hz or 100Hz Figure 6.4. Continuous measurement mode 6.4.3.2. Data Ready When measurement data is stored and ready to be read, DRDY bit in ST1 register turnes to "1". This is called "Data Ready". When measurement is performed correctly, AK09911 becomes Data Ready on transition to PD after measurement. 6.4.3.3. Normal Read Sequence (1) Check Data Ready or not by polling DRDY bit of ST1 register DRDY: Shows Data Ready or not. Not when "0", Data Ready when "1". DOR: Shows if any data has been skipped before the current data or not. There are no skipped data when "0", there are skipped data when "1". (2) Read measurement data When any of measurement data register (HXL to TMPS) or ST2 register is read, AK09911 judges that data reading is started. When data reading is started, DRDY bit and DOR bit turnes to "0". (3) Read ST2 register (required) HOFL: Shows if magnetic sensor is overflowed or not. "0" means not overflowed, "1" means overflowed. When ST2 register is read, AK09911 judges that data reading is finished. Stored measurement data is protected during data reading and data is not updated. By reading ST2 register, this protection is released. It is required to read ST2 register after data reading. (N-1)th PD Nth Measurement (N+1)th Measurement PD Measurement Data Register (N-1)th Nth PD (N+1)th DRDY Data read ST1 Data(N) ST2 ST1 Data(N+1) ST2 Figure 6.5. Normal read sequence MS1526-E-01 2014/7 - 16 - [AK09911] 6.4.3.4. Data Read Start during Measurement When sensor is measuring (Measurement period), measurement data registers (HXL to TMPS) keep the previous data. Therefore, it is possible to read out data even in measurement period. If data is started to be read during measurement period, previous data is read. (N-1)th PD Nth Measurement (N+1)th Measurement PD PD Measurement Data Register (N-1)th Nth DRDY Data read ST1 Data(N) ST2 ST1 Data(N) ST2 Figure 6.6. Data read start during measurement MS1526-E-01 2014/7 - 17 - [AK09911] 6.4.3.5. Data Skip When Nth data was not read before (N+1)th measurement ends, Data Ready remains until data is read. In this case, a set of measurement data is skipped so that DOR bit turnes to "1". When data reading started after Nth measurement ended and did not finish reading before (N+1)th measurement ended, Nth measurement data is protected to keep correct data. In this case, a set of measurement data is skipped and not stored so that DOR bit turnes to "1". In both case, DOR bit turnes to "0" at the next start of data reading. (N-1)th PD Nth Measurement (N+1)th Measurement PD Measurement Data Register (N-1)th Nth PD (N+1)th DRDY DOR Data read ST1 Data(N+1) ST2 Figure 6.7. Data Skip: When data is not read (N-1)th PD Nth Measurement (N+1)th PD (N+2)th PD Measurement PD Measurement Measurement Data Register (N-1)th Nth (N+2)th Data register is protected because data is being read Not data ready because data is not updated DRDY (N+1)th data is skipped DOR Data read ST1 DataN ST2 ST1 Data(N+2) Figure 6.8. Data Skip: When data read has not been finished before the next measurement end 6.4.3.6. End Operation Set Power-down mode (MODE[4:0]="00000") to end Continuous measurement mode. MS1526-E-01 2014/7 - 18 - [AK09911] 6.4.3.7. Magnetic Sensor Overflow AK09911 has the limitation for measurement range that the sum of absolute values of each axis should be smaller than 4912 T. |X|+|Y|+|Z| < 4912 T When the magnetic field exceeded this limitation, data stored at measurement data are not correct. This is called Magnetic Sensor Overflow. When magnetic sensor overlow occurs, HOFL bit turns to "1". When the next measurement starts, it returns to "0". 6.4.4. Self-test Mode Self-test mode is used to check if the magnetic sensor is working normally. When Self-test mode (MODE[4:0]="10000") is set, magnetic field is generated by the internal magnetic source and magnetic sensor is measured. Measurement data is stored to measurement data registers (HXL to HZH), then AK09911 transits to Power-down mode automatically. Data read sequence and functions of read-only registers in Self-test mode is the same as Single measurement mode. 6.4.4.1. Self-test Sequence (1) Set Power-down mode. (MODE[4:0]="00000") (2) Set Self-test mode. (MODE[4:0]="10000") (3) Check Data Ready or not by polling DRDY bit of ST1 register When Data Ready, proceed to the next step. (4) Read measurement data (HXL to HZH) 6.4.4.2. Self-test Judgment When measurement data read by the above sequence is in the range of following table after sensitivity adjustment (refer to 8.3.11), AK09911 is working normally. Criteria HX[15:0] -30 HX +30 HY[15:0] -30 HY +30 HZ[15:0] -400 HZ -50 6.4.5. Fuse ROM Access Mode Fuse ROM access mode is used to read Fuse ROM data. Sensitivity adjustment data for each axis is stored in fuse ROM. Set Fuse ROM Access mode (MODE[4:0]="11111") before reading Fuse ROM data. When Fuse ROM Access mode is set, circuits required for reading fuse ROM are turned on. After reading fuse ROM data, set Power-down mode (MODE[4:0]="00000") before the transition to another mode. MS1526-E-01 2014/7 - 19 - [AK09911] 7. Serial Interface The I2C bus interface of AK09911 supports the Standard mode (100 kHz max.), the Fast mode (400 kHz max.) and the High-speed mode (Hs-mode, 2.5 MHz max.). 7.1. Data Transfer To access AK09911 on the bus, generate a start condition first. Next, transmit a one-byte slave address including a device address. At this time, AK09911 compares the slave address with its own address. If these addresses match, AK09911 generates an acknowledgement, and then executes READ or WRITE instruction. At the end of instruction execution, generate a stop condition. 7.1.1. Change of Data A change of data on the SDA line must be made during "Low" period of the clock on the SCL line. When the clock signal on the SCL line is "High", the state of the SDA line must be stable. (Data on the SDA line can be changed only when the clock signal on the SCL line is "Low".) During the SCL line is "High", the state of data on the SDA line is changed only when a start condition or a stop condition is generated. SCL SDA DATA LINE STABLE : DATA VALID CHANGE OF DATA ALLOWED Figure 7.1. Data Change 7.1.2. Start/Stop Condition If the SDA line is driven to "Low" from "High" when the SCL line is "High", a start condition is generated. Every instruction starts with a start condition. If the SDA line is driven to "High" from "Low" when the SCL line is "High", a stop condition is generated. Every instruction stops with a stop condition. SCL SDA START CONDITION STOP CONDITION Figure 7.2. Start and Stop Condition MS1526-E-01 2014/7 - 20 - [AK09911] 7.1.3. Acknowledge The IC that is transmitting data releases the SDA line (in the "High" state) after sending 1-byte data. The IC that receives the data drives the SDA line to "Low" on the next clock pulse. This operation is referred as acknowledge. With this operation, whether data has been transferred successfully can be checked. AK09911 generates an acknowledge after reception of a start condition and slave address. When a WRITE instruction is executed, AK09911 generates an acknowledge after every byte is received. When a READ instruction is executed, AK09911 generates an acknowledge then transfers the data stored at the specified address. Next, AK09911 releases the SDA line then monitors the SDA line. If a master IC generates an acknowledge instead of a stop condition, AK09911 transmits the 8bit data stored at the next address. If no acknowledge is generated, AK09911 stops data transmission. Clock pulse for acknowledge SCL FROM MASTER 1 9 8 DATA OUTPUT BY TRANSMITTER not acknowledge DATA OUTPUT BY RECEIVER START CONDITION acknowledge Figure 7.3. Generation of Acknowledge 7.1.4. Slave Address The slave address of AK09911 can be selected from the following list by setting CAD pin. When CAD pin is fixed to VSS, the corresponding slave address bit is "0". When CAD pin is fixed to VDD, the corresponding slave address bit is "1". Table 7.1. Slave Address and CAD pin CAD 0 1 Slave Address 0CH 0DH MSB 0 LSB 0 0 1 1 0 CAD R/W Figure 7.4. Slave Address The first byte including a slave address is transmitted after a start condition, and an IC to be accessed is selected from the ICs on the bus according to the slave address. When a slave address is transferred, the IC whose device address matches the transferred slave address generates an acknowledge then executes an instruction. The 8th bit (least significant bit) of the first byte is a R/W bit. When the R/W bit is set to "1", READ instruction is executed. When the R/W bit is set to "0", WRITE instruction is executed. MS1526-E-01 2014/7 - 21 - [AK09911] 7.2. WRITE Instruction When the R/W bit is set to "0", AK09911 performs write operation. In write operation, AK09911 generates an acknowledge after receiving a start condition and the first byte (slave address) then receives the second byte. The second byte is used to specify the address of an internal control register and is based on the MSB-first configuration. MSB A7 LSB A6 A5 A4 A3 A2 A1 A0 Figure 7.5. Register Address After receiving the second byte (register address), AK09911 generates an acknowledge then receives the third byte. The third and the following bytes represent control data. Control data consists of 8 bits and is based on the MSB-first configuration. AK09911 generates an acknowledge after every byte is received. Data transfer always stops with a stop condition generated by the master. MSB D7 LSB D6 D5 D4 D3 D2 D1 D0 Figure 7.6. Control Data AK09911 can write multiple bytes of data at a time. After reception of the third byte (control data), AK09911 generates an acknowledge then receives the next data. If additional data is received instead of a stop condition after receiving one byte of data, the address counter inside the LSI chip is automatically incremented and the data is written at the next address. The address is incremented from 00H to 18H, from 30H to 32H, or from 60H to 62H. When the address is 00H to 18H, the address is incremented 00H 01H 02H 03H 10H 11H ... 18H,and the address goes back to 00H after 18H. When the address is 30H to 32H, the address goes back to 30H after 32H. When the address is 60H to 62H, the address goes back to 60H after 62H. Actual data is written only to Read/Write registers (refer to Table 8.2. ). S T A R T SDA S S T O P R/W="0" Slave Address Register Address(n) A C K Data(n) A C K Data(n+1) A C K Data(n+x) A C K A C K P A C K Figure 7.7. WRITE Instruction MS1526-E-01 2014/7 - 22 - [AK09911] 7.3. READ Instruction When the R/W bit is set to "1", AK09911 performs read operation. If a master IC generates an acknowledge instead of a stop condition after AK09911 transfers the data at a specified address, the data at the next address can be read. Address can be 00H to 18H, 30H to 32H, and 60H to 62H. When the address is 00H to 18H, the address is incremented 00H 01H 02H 03H 10H 11H ... 18H,and the address goes back to 00H after 18H. When the address is 30H to 32H, the address goes back to 30H after 32H. When the address is 60H to 62H, the address goes back to 60H after 62H. AK09911 supports one byte read and multiple byte read. 7.3.1. One Byte READ AK09911 has an address counter inside the LSI chip. In current address read operation, the data at an address specified by this counter is read. The internal address counter holds the next address of the most recently accessed address. For example, if the address most recently accessed (for READ instruction) is address "n", and a current address read operation is attempted, the data at address "n+1" is read. In one byte read operation, AK09911 generates an acknowledge after receiving a slave address for the READ instruction (R/W bit="1"). Next, AK09911 transfers the data specified by the internal address counter starting with the next clock pulse, then increments the internal counter by one. If the master IC generates a stop condition instead of an acknowledge after AK09911 transmits one byte of data, the read operation stops. S T A R T SDA S S T O P R/W="1" Slave Address Data(n) A C K Data(n+1) A C K Data(n+2) A C K Data(n+x) A C K P A C K Figure 7.8. One Byte READ 7.3.2. Multiple Byte READ By multiple byte read operation, data at an arbitrary address can be read. The multiple byte read operation requires to execute WRITE instruction as dummy before a slave address for the READ instruction (R/W bit="1") is transmitted. In random read operation, a start condition is first generated then a slave address for the WRITE instruction (R/W bit="0") and a read address are transmitted sequentially. After AK09911 generates an acknowledge in response to this address transmission, a start condition and a slave address for the READ instruction (R/W bit="1") are generated again. AK09911 generates an acknowledge in response to this slave address transmission. Next, AK09911 transfers the data at the specified address then increments the internal address counter by one. If the master IC generates a stop condition instead of an acknowledge after data is transferred, the read operation stops. S T A R T SDA S S T A R T R/W="0" Slave Address Register Address(n) A C K S A C K S T O P R/W="1" Slave Address Data(n) A C K Data(n+1) A C K Data(n+x) A C K P A C K Figure 7.9. Multiple Byte READ MS1526-E-01 2014/7 - 23 - [AK09911] 7.4. High-speed Mode (Hs-mode) AK09911 supports the Hs-mode. Hs-mode can only commence after the following conditions (all of which are in Fast/Standard-mode): START condition (S) 8-bit master code (00001XXX) not-acknowledge bit () The diagram below shows data flow of the Hs-mode. After start condition, feed master code 00001XXX for transfer to the Hs-mode. And then AK09911 feeds back not-acknowledge bit and swich over to circuit for the Hs-mode between times t1 and tH. AK09911 can communicate at the Hs-mode from next START condition. At time tFS, AK09911 switchs its internal circuit from the Hs-mode to the First mode with the STOP condition (P). This transfer completes in the bus free time (tBUF). Figure 7.10. Data transfer format in Hs-mode Figure 7.11. Hs-mode transfer MS1526-E-01 2014/7 - 24 - [AK09911] 8. Registers 8.1. Description of Registers AK09911 has registers of 20 addresses as indicated in Every address consists of 8 bits data. Data is transferred to or received from the external CPU via the serial interface described previously. Table 8.1. Register Table 00H READ/ WRITE READ Campany ID Bit width 8 WIA2 01H READ Device ID 8 INFO1 02H READ Information 1 8 INFO2 03H READ Information 2 8 ST1 10H READ Status 1 8 Data status HXL 11H READ Measurement Magnetic Data 8 X-axis data HXH 12H READ 8 Name Address WIA1 Description Remarks HYL 13H READ 8 HYH 14H READ 8 Y-axis data HZL 15H READ 8 HZH 16H READ 8 TMPS 17H READ Dummy Register 8 Dummy ST2 18H READ Status 2 8 Data status CNTL1 30H Dummy Register 8 Dummy CNTL2 31H Control 2 8 Control settings CNTL3 32H Control 3 8 Control settings TS1 33H Test 8 DO NOT ACCESS ASAX 60H READ/ WRITE READ/ WRITE READ/ WRITE READ/ WRITE READ X-axis sensitivity adjustment value 8 Fuse ROM ASAY 61H READ Y-axis sensitivity adjustment value 8 Fuse ROM ASAZ 62H READ Z-axis sensitivity adjustment value 8 Fuse ROM Z-axis data Addresses 00H to 18H, 30H to 32H and 60H to 62H are compliant with automatic increment function of serial interface respectively. Values of addresses 60H to 62H can be read only in Fuse ROM access mode. In other modes, read data is not correct. When the address is in 00H to 18H, the address is incremented 00H 01H 02H 03H 10H 11H ... 18H, and the address goes back to 00H after 18H. When the address is in 30H to 32H, the address goes back to 30H after 32H. When the address is in 60H to 62H, the address goes back to 60H after 62H. MS1526-E-01 2014/7 - 25 - [AK09911] 8.2. Register Map Table 8.2. Register Map Addr. Register name D7 D6 D5 D4 Read-only register 1 0 0 0 0 0 INFO16 INFO15 INFO14 INFO26 INFO25 INFO24 0 0 0 HX6 HX5 HX4 HX14 HX13 HX12 HY6 HY5 HY4 HY14 HY13 HY12 HZ6 HZ5 HZ4 HZ14 HZ13 HZ12 0 0 0 0 0 0 Read/Wright register 0 0 0 D3 D2 D1 D0 1 0 INFO13 INFO23 0 HX3 HX11 HY3 HY11 HZ3 HZ11 0 HOFL 0 1 INFO12 INFO22 0 HX2 HX10 HY2 HY10 HZ2 HZ10 0 0 0 0 INFO11 INFO21 DOR HX1 HX9 HY1 HY9 HZ1 HZ9 0 0 0 1 INFO10 INFO20 DRDY HX0 HX8 HY0 HY8 HZ0 HZ8 0 0 00H 01H 02H 03H 10H 11H 12H 13H 14H 15H 16H 17H 18H WIA1 WIA2 INFO1 INFO2 ST1 HXL HXH HYL HYH HZL HZH TMPS ST2 0 0 INFO17 INFO27 HSM HX7 HX15 HY7 HY15 HZ7 HZ15 0 0 30H CNTL1 0 0 0 0 0 31H CNTL2 0 0 0 MODE4 MODE3 MODE2 MODE1 MODE0 32H CNTL3 0 0 0 0 0 0 0 SRST 33H TS1 - - - - - - - - 60H 61H 62H ASAX ASAY ASAZ Read-only register COEFX7 COEFX6 COEFX5 COEFX4 COEFX3 COEFX2 COEFX1 COEFX0 COEFY7 COEFY6 COEFY5 COEFY4 COEFY3 COEFY2 COEFY1 COEFY0 COEFZ7 COEFZ6 COEFZ5 COEFZ4 COEFZ3 COEFZ2 COEFZ1 COEFZ0 When VDD is turned ON, POR function works and all registers of AK09911 are initialized regardless of VID status. To write data to or to read data from register, VID must be ON. TS1 is test registers for shipment test. Do not use these registers. MS1526-E-01 2014/7 - 26 - [AK09911] 8.3. Detailed of Description of Register 8.3.1. WIA: Who I Am Addr 00H 01H Register name WIA1 WIA2 D7 0 0 D6 1 0 D5 D4 Read-only register 0 0 0 0 D3 D2 D1 D0 1 0 0 1 0 0 0 1 D2 D1 D0 WIA1[7:0]: Company ID of AKM. It is described in one byte and fixed value. 48H: fixed WIA2[7:0]: Device ID of AK09911. It is described in one byte and fixed value. 05H: fixed 8.3.2. INFO: Information Addr Register name 02H 03H INFO1 INFO2 D7 D6 D5 D4 D3 Read-only register INFO17 INFO16 INFO15 INFO14 INFO13 INFO12 INFO11 INFO10 INFO27 INFO26 INFO25 INFO24 INFO23 INFO22 INFO21 INFO20 INFO1[7:0]/INFO2[7:0]: Device information of AKM. 8.3.3. ST1: Status 1 Addr 10H Register name ST1 Reset D7 D6 HSM 0 0 0 D5 D4 Read-only register 0 0 0 0 D3 D2 D1 D0 0 0 0 0 DOR 0 DRDY 0 DRDY: Data Ready "0": Normal "1": Data is ready DRDY bit turns to "1" when data is ready in Single measurement mode, Continuous measurement mode 1, 2, 3, 4 or Self-test mode. It returns to "0" when any one of ST2 register or measurement data register (HXL to TMPS) is read. DOR: Data Overrun "0": Normal "1": Data overrun DOR bit turns to "1" when data has been skipped in Continuous measurement mode 1, 2, 3, 4. It returns to "0" when any one of ST2 register or measurement data register (HXL to TMPS) is read. HSM: I2C Hs-mode "0": Standard/Fast mode "1": Hs-mode HSM bit turns to "1" when I2C bus interface is changed from Standard or Fast mode to High-speed mode (Hs-mode). MS1526-E-01 2014/7 - 27 - [AK09911] 8.3.4. HXL to HZH: Measurement data Addr 11H 12H 13H 14H 15H 16H Register name HXL HXH HYL HYH HZL HZH Reset D7 D6 HX7 HX15 HY7 HY15 HZ7 HZ15 0 HX6 HX14 HY6 HY14 HZ6 HZ14 0 D5 D4 Read-only register HX5 HX4 HX13 HX12 HY5 HY4 HY13 HY12 HZ5 HZ4 HZ13 HZ12 0 0 D3 D2 D1 D0 HX3 HX11 HY3 HY11 HZ3 HZ11 0 HX2 HX10 HY2 HY10 HZ2 HZ10 0 HX1 HX9 HY1 HY9 HZ1 HZ9 0 HX0 HX8 HY0 HY8 HZ0 HZ8 0 Measurement data of magnetic sensor X-axis/Y-axis/Z-axis HXL[7:0]: X-axis measurement data lower 8-bit HXH[15:8]: X-axis measurement data higher 8-bit HYL[7:0]: Y-axis measurement data lower 8-bit HYH[15:8]: Y-axis measurement data higher 8-bit HZL[7:0]: Z-axis measurement data lower 8-bit HZH[15:8]: Z-axis measurement data higher 8-bit Measurement data is stored in two's complement and Little Endian format. Measurement range of each axis is -8190 to 8190. Table 8.3. Measurement magnetic data format Measurement data (each axis) [15:0] Two's complement Hex Decimal 0001 1111 1111 1110 1FFE 8190 | | | 0000 0000 0000 0001 0001 1 0000 0000 0000 0000 0000 0 1111 1111 1111 1111 FFFF -1 | | | 1110 0000 0000 0010 E002 -8190 Magnetic flux density [] 4912(max.) | 0.6 0 -0.6 | -4912(min.) 8.3.5. TMPS: Dummy Register Addr 17H Register name TMPS Reset D7 0 0 D6 0 0 D5 D4 Read-only register 0 0 0 0 D3 D2 D1 D0 0 0 0 0 0 0 0 0 Dummy register. MS1526-E-01 2014/7 - 28 - [AK09911] 8.3.6. ST2: Status 2 Addr 18H Register name ST2 Reset D7 D6 0 0 0 0 D5 D4 Read-only register 0 0 0 0 D3 D2 D1 D0 HOFL 0 0 0 0 0 0 0 HOFL: Magnetic sensor overflow "0": Normal "1": Magnetic sensor overflow occurred In Single measurement mode, Continuous measurement mode 1, 2, 3, 4, and Self-test mode, magnetic sensor may overflow even though measurement data regiseter is not saturated. In this case, measurement data is not correct and HOFL bit turns to "1". When next measurement stars, it returns to "0". Refer to 6.4.3.6 for detailed information. ST2 register has a role as data reading end register, also. When any of measurement data register (HXL to TMPS) is read in Continuous measurement mode 1, 2, 3, 4, it means data reading start and taken as data reading until ST2 register is read. Therefore, when any of measurement data is read, be sure to read ST2 register at the end. 8.3.7. CNTL1: Dummy Register Addr 30H Register name CNTL1 Reset D7 D6 0 0 0 0 D7 D6 D5 D4 Read/Write register 0 0 0 0 D3 D2 D1 D0 0 0 0 0 0 0 0 0 D3 D2 D1 D0 Dummy register. 8.3.8. CNTL2: Control 2 Addr 31H Register name CNTL2 Reset 0 0 0 0 D5 D4 Read/Write register 0 MODE4 MODE3 0 0 0 MODE2 0 MODE1 MODE0 0 0 MODE[4:0]: Operation mode setting "00000": Power-down mode "00001": Single measurement mode "00010": Continuous measurement mode 1 "00100": Continuous measurement mode 2 "00110": Continuous measurement mode 3 "01000": Continuous measurement mode 4 "10000": Self-test mode "11111": Fuse ROM access mode Other code settings are prohibited . When each mode is set, AK09911 transits to the set mode. Refer to 6.3 for detailed information. MS1526-E-01 2014/7 - 29 - [AK09911] 8.3.9. CNTL3: Control 3 Register name Addr 32H CNTL3 Reset D7 D6 0 0 0 0 D5 D4 Read/Write register 0 0 0 0 D3 D2 D1 D0 0 0 0 0 0 0 SRST 0 SRST: Soft reset "0": Normal "1": Reset When "1" is set, all registers are initialized. After reset, SRST bit turns to "0" automatically. 8.3.10. TS1: Test Register name Addr 33H TS1 Reset D7 0 D6 0 D5 D4 Read/Write register 0 0 D3 D2 D1 D0 0 0 0 0 D3 D2 D1 D0 TS1 register is AKM internal test register. Do not use this register. 8.3.11. ASAX, ASAY, ASAZ: Sensitivity Adjustment Values Addr 60H 61H 62H Register name ASAX ASAY ASAZ Reset D7 D6 D5 D4 Read-only register COEFX7 COEFX6 COEFX5 COEFX4 COEFX3 COEFX2 COEFX1 COEFX0 COEFY7 COEFY6 COEFY5 COEFY4 COEFY3 COEFY2 COEFY1 COEFY0 COEFZ7 COEFZ6 COEFZ5 COEFZ4 COEFZ3 COEFZ2 COEFZ1 COEFZ0 - Sensitivity adjustment data for each axis is stored to fuse ROM on shipment. ASAX[7:0]: Magnetic sensor X-axis sensitivity adjustment value ASAY[7:0]: Magnetic sensor Y-axis sensitivity adjustment value ASAZ[7:0]: Magnetic sensor Z-axis sensitivity adjustment value How to adjust sensitivity The sensitivity adjustment is done by the equation below, ASA Hadj = H x + 1 128 where H is the measurement data read out from the measurement data register, ASA is the sensitivity adjustment value, and Hadj is the adjusted measurement data. MS1526-E-01 2014/7 - 30 - [AK09911] 9. Example of Recommended External Connection Host CPU VID POWER 1.65V to Vdd VDD POWER 2.4V to 3.6V Power for I/F GPIO 0.1F SDA 2 I C I/F RSTN VID C AK09911C SCL 0.1F VSS (Top view) TST 3 CAD 2 VDD B A 1 Slave address select CAD VSS VDD address 0 0 0 1 1 0 0 R/W 0 0 0 1 1 0 1 R/W Pins of dot circle should be kept non-connected. MS1526-E-01 2014/7 - 31 - [AK09911] 10. Package 10.1. Marking Date code: X1X2X3X4X5 X1 = ID X2 = Year code X3X4 = Week code X5 = Lot Product name: 9911 X1X2X3X4X5 9911 <Top view> 10.2. Pin Assignment C B A 3 SDA SCL TST 2 RSTN CAD 1 VID VSS VDD <Top view> MS1526-E-01 2014/7 - 32 - [AK09911] 10.3. Outline Dimensions [mm] 1.190.03 3 2 0.8 1 1 2 3 0.4 0.8 1.190.03 C B A 0.4 0.240.03 0.40 0.57 max. 0.13 0.05 C C 10.4. Recommended Foot Print Pattern [mm] 3 2 1 C 0.4 B A 0.4 0.23 MS1526-E-01 2014/7 - 33 - [AK09911] 11. Relationsip between the Magnetic Field and Output Code The measurement data increases as the magnetic flux density increases in the arrow directions. MS1526-E-01 2014/7 - 34 - [AK09911] Important Notice 0. Asahi Kasei Microdevices Corporation ("AKM") reserves the right to make changes to the information contained in this document without notice. When you consider any use or application of AKM product stipulated in this document ("Product"), please make inquiries the sales office of AKM or authorized distributors as to current status of the Products. 1. All information included in this document are provided only to illustrate the operation and application examples of AKM Products. AKM neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of AKM or any third party with respect to the information in this document. You are fully responsible for use of such information contained in this document in your product design or applications. AKM ASSUMES NO LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS. 2. 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This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of AKM. MS1526-E-01 2014/7 - 35 -