1、 AK8963 MS1356-E-02 - 1 - 2013/10 AK8963 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 com
2、pass application Built-in A to D Converter for magnetometer data out 14-/16-bit selectable data out for each 3 axis magnetic components - Sensitivity: 0.6 T/LSB typ. (14-bit) 0.15T/LSB typ. (16-bit) Serial interface - I 2 C bus interface. Standard mode and Fast mode compliant with Philips I 2 C spec
3、ification Ver.2.1 - 4-wire SPI Operation modes: Power-down, Single measurement, Continuous measurement, External trigger 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
4、on Reset circuit Self test function with built-in 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: - Averag
5、e power consumption at 8 Hz repetition rate: 280A typ. Package: AK8963C 14-pin WL-CSP (BGA): 1.6 mm 1.6 mm 0.5 mm (typ.) AK8963N 16-pin QFN package: 3.0 mm 3.0 mm 0.75 mm (typ.) AK8963 MS1356-E-02 - 2 - 2013/10 2. Overview AK8963 is 3-axis electronic compass IC with high sensitive Hall sensor techno
6、logy. Small package of AK8963 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
7、 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. AK8963 has the following features: (1) Silicon monolithic Hall-effect magnetic sensor with magnetic concentrator realizes 3-axis magnetometer
8、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) 16-bit (0.15 T/LSB) Measurement range: 4900 T Average cur
9、rent at 8Hz repetition rate: 280A typ. (3) Digital serial interface - I 2 C bus interface to control AK8963 functions and to read out the measured data by external CPU. A dedicated power supply for I 2 C bus interface can work in low-voltage apply as low as 1.65V. - 4-wire SPI is also supported. A d
10、edicated power supply for SPI can work in low-voltage apply as low as 1.65V. (4) DRDY pin and register inform 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 functi
11、on with internal magnetic source to confirm magnetic sensor operation on end products. AK8963 MS1356-E-02 - 3 - 2013/10 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 C
12、haracteristics 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. I 2 C Bus Interface 11 6. Functional Explanat
13、ion 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. Dat
14、a 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. R
15、eading Data 21 7.2. I 2 C 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.
16、 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 AK8963 MS1356-
17、E-02 - 4 - 2013/10 8.3.7. CNTL2: Control2 . 31 8.3.8. ASTC: Self Test Control 31 8.3.9. TS1, TS2: Test 1, 2 . 31 8.3.10. I2CDIS: I 2 C Disable 31 8.3.11. ASAX, ASAY , ASAZ: Sensitivity Adjustment values . 32 9. Example of Recommended External Connection . 33 9.1. I 2 C Bus Interface 33 9.2. 4-wire S
18、PI 34 10. Package 35 10.1. Marking 35 10.2. Pin Assignment 35 10.3. Outline Dimensions 36 10.4. Recommended Foot Print Pattern . 37 11. Relationship between the Magnetic Field and Output Code 38 AK8963 MS1356-E-02 - 5 - 2013/10 4. Circuit Configuration 4.1. Block Diagram 3-axis Hall sensor MUX SDA/S
19、I DRDY Chopper SW HE-Drive Pre- AMP Integrator & ADC Interface, Logic & Register SCL/SK VDD Voltage Reference Timing Control VID SO OSC1 CSB Magnetic source CAD0 VSS POR FUSE ROM CAD1 TST1 TRIG RSV RSTN OSC2 4.2. Block Function Block Function 3-axis Hall sensor Monolithic Hall elements. MUX Multiple
20、xer for selecting Hall elements. Chopper SW Performs chopping. HE-Drive Magnetic sensor drive circuit for constant-current driving of sensor Pre-AMP Fixed-gain differential amplifier used to amplify the magnetic sensor signal. Integrator & ADC Integrates and amplifies pre-AMP output and performs ana
21、log-to-digital conversion. OSC1 Generates an operating clock for sensor measurement. 12MHz(typ.) OSC2 Generates an operating clock for sequencer. 128kHz(typ.) POR Power On Reset circuit. Generates reset signal on rising edge of VDD. Interface Logic & Register Exchanges data with an external CPU. DRD
22、Y pin indicates sensor measurement end and data is ready to be read. I 2 C bus interface using two pins, namely, SCL and SDA. Standard mode and Fast mode are supported. The low-voltage specification can be supported by applying 1.65V to the VID pin. 4-wire SPI is also supported by SK, SI, SO and CSB
23、 pins. 4-wire SPI works in VID pin voltage down to 1.65V, too. Timing Control Generates a timing signal required for internal operation from a clock generated by the OSC1. Magnetic Source Generates magnetic field for self test of magnetic sensor. FUSE ROM Fuse for adjustment AK8963 MS1356-E-02 - 6 -
24、 2013/10 4.3. Pin Function QFN Pin No. WLCSP Pin No. Pin name I/O Power supply system Type Function 1 A1 DRDY O VID CMOS Data Ready output pin. “H” active. Informs measurement ended and data is ready to be read. 2 A2 CSB I VID CMOS Chip select pin for 4-wire SPI. “L” active. Connect to VID when sele
25、cting I 2 C bus interface. 3 A3 SCL I VID CMOS When the I 2 C bus interface is selected (CSB pin is connected to VID) SCL: Control data clock input pin Input: Schmidt trigger SK When the 4-wire SPI is selected SK: Serial clock input pin 5 A4 SDA I/O VID CMOS When the I 2 C bus interface is selected
26、(CSB pin is connected to VID) SDA: Control data input/output pin Input: Schmidt trigger, Output: Open drain SI I When the 4-wire SPI is selected SI: Serial data input pin 15 B1 VDD - - Power Analog Power supply pin. 4 B3 RSV O VID CMOS Reserved. Keep this pin electrically non-connected. 6 B4 SO O VI
27、D CMOS When the I 2 C bus interface is selected (CSB pin is connected to VID) Hi-Z output. Keep this pin electrically non-connected. When the 4-wire SPI is selected Serial data output pin 13 C1 VSS - - Power Ground pin. 14 C2 TST1 I VDD CMOS Test pin. Pulled down by 100k internal resister. Keep this
28、 pin electrically non-connected or connect to VSS. 7 C3 TRG I VID CMOS External trigger pulse input pin. Enabled only in External trigger mode. Pulled down by 100k internal resister. When External trigger mode is not in use, keep this pin electrically non-connected or connect to VSS. 8 C4 VID - - Po
29、wer Digital interface positive power supply pin. 12 D1 CAD0 I VDD CMOS When the I 2 C bus interface is selected (CSB pin is connected to VID) CAD0: Slave address 0 input pin Connect to VSS or VDD. When the 4-wire serial interface is selected Connect to VSS. 11 D2 CAD1 I VDD CMOS When the I 2 C bus i
30、nterface is selected (CSB pin is connected to VID) CAD1: Slave address 1 input pin Connect to VSS or VDD. When the 4-wire serial interface is selected Connect to VSS. 10 D4 RSTN I VID CMOS Reset pin. Resets registers by setting to “L”. Connect to VID when not in use. AK8963 MS1356-E-02 - 7 - 2013/10
31、 5. Overall Characteristics 5.1. Absolute Maximum Ratings Vss=0V Parameter Symbol Min. Max. Unit Power supply voltage (Vdd, Vid) V+ -0.3 +4.3 V Input voltage VIN -0.3 (V+)+0.3 V Input current IIN - 10 mA Storage temperature TST -40 +125 C (Note 1) If the device is used in conditions exceeding these
32、values, the device may be destroyed. Normal operations are not guaranteed in such exceeding conditions. 5.2. Recommended Operating Conditions Vss=0V Parameter Remark Symbol Min. Typ. Max. Unit Operating temperature Ta -30 +85 C Power supply voltage VDD pin voltage Vdd 2.4 3.0 3.6 V VID pin voltage V
33、id 1.65 Vdd 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 Symbol Pin Condition Min. Typ. Max. Unit High level input voltage 1 VIH1 CSB RSTN TRG 70%Vid V Lo
34、w level input voltage 1 VIL1 30%Vid V High level input voltage 2 VIH2 SK/SCL SI/SDA 70%Vid Vid+0.5 V Low level input voltage 2 VIL2 -0.5 30%Vid V High level input voltage 3 VIH3 CAD0 CAD1 70%Vdd V Low level input voltage 3 VIL3 30%Vdd V Input current 1 IIN1 SK/SCL SI/SDA CSB RSTN Vin=Vss or Vid -10
35、+10 A Input current 2 IIN2 CAD0 CAD1 Vin=Vss or Vdd -10 +10 A Input current 3 IIN3 TRG Vin=Vid 100 A Input current 4 IIN4 TST1 Vin=Vdd 100 A Hysteresis input voltage (Note 2) VHS SCL SDA Vid 2V 5%Vid V Vid2V 10%Vid V High level output voltage 1 VOH1 SO DRDY IOH -100A 80%Vid V Low level output voltag
36、e 1 VOL1 IOL +100A 20%Vid V Low level output voltage 2 (Note 3)(Note 4) VOL2 SDA IOL 3mA Vid 2V 0.4 V IOL 3mA Vid2V 20%Vid V Current consumption (Note 5) IDD1 VDD VID Power-down mode Vdd=Vid=3.0V 3 10 A IDD2 When magnetic sensor is driven 5 10 mA IDD3 Self-test mode 9 15 mA IDD4 (Note 6) 0.1 5 A (No
37、te 2) Schmitt trigger input (reference value for design) (Note 3) Maximum load capacitance: 400pF (capacitive load of each bus line applied to the I 2 C bus interface) (Note 4) Output is open-drain. Connect a pull-up resistor externally. (Note 5) Without any resistance load (Note 6) (case1)Vdd=ON, V
38、id=ON, RSTN pin = “L”. (case2)Vdd=ON, Vid=OFF(0V),RSTN pin = “L”. AK8963 MS1356-E-02 - 8 - 2013/10 (case3)Vdd=Off(0V), Vid=On. 5.3.2. AC Characteristics Parameter Symbol Pin Condition Min. Typ. Max. Unit Power supply rise time (Note 7) PSUP VDD VID Period of time that VDD (VID) changes from 0.2V to
39、Vdd (Vid). (Note 8) 50 ms POR completion time (Note 7) PORT Period of time after PSUP to Power-down mode (Note 8) 100 s Power supply turn off voltage SDV VDD VID Turn off voltage to enable POR to restart (Note 8) 0.2 V Power supply turn on interval (Note 7) PSINT VDD VID Period of time that voltage
40、lower than SDV needed to be kept to enable POR to restart (Note 8) 100 s Wait time before mode setting Twat 100 s (Note 7) Reference value for design (Note 8) When POR circuit detects the rise of VDD/VID voltage, it resets internal circuits and initializes the registers. After reset, AK8963 transits
41、 to Power-down mode. Parameter Symbol Pin Condition Min. Typ. Max. Unit Trigger input effective pulse width tTRIGH TRG 200 ns Trigger input effective frequency (Note 9) tTRIGf TRG 100 Hz (Note 9) The value when the period of time from the end of the measurement to the next trigger input is 1.3ms. VI
42、H tTRIGH 0V PSINT:100s PSUP:50ms PORT:100s Power down mode Powe down mode SDV:0.2V VDD/(VID) AK8963 MS1356-E-02 - 9 - 2013/10 Parameter Symbol Pin Condition Min. Typ. Max. Unit Reset input effective pulse width (“L”) tRSTL RSTN 5 s VIL tRSTL 5.3.3. Analog Circuit Characteristics Parameter Symbol Con
43、dition Min. Typ. Max. Unit Measurement data output bit DBIT BIT = “0” 14 bit BIT = “1” 16 Time for measurement TSM Single measurement mode 7.2 9 ms Magnetic sensor sensitivity BSE Tc=25 C (Note 10) 0.57 0.6 0.63 T/LSB BIT = “0” BIT = “1” 0.1425 0.15 0.1575 Magnetic sensor measurement range (Note 11)
44、 BRG Tc=25C (Note 10) 4912 T Magnetic sensor initial offset (Note 12) Tc=25C BIT = “0” -500 500 LSB (Note 10) Value after sensitivity is adjusted using sensitivity fine adjustment data stored in Fuse ROM. (Refer to 8.3.11 for how to adjust.) (Note 11) Reference value for design (Note 12) Value of me
45、asurement data register on shipment without applying magnetic field on purpose. AK8963 MS1356-E-02 - 10 - 2013/10 5.3.4. 4-wire SPI 4-wire SPI is compliant with mode 3 Parameter Symbol Condition Min. Typ. Max. Unit CSB setup time Tcs 50 ns Data setup time Ts 50 ns Data hold time Th 50 ns SK high tim
46、e Twh Vid 2.5V 100 ns 2.5VVid 1.65V 150 ns SK low time Twl Vid 2.5V 100 ns 2.5VVid 1.65V 150 ns SK setup time Tsd 50 ns SK to SO delay time (Note 13) Tdd 50 ns CSB to SO delay time (Note 13) Tcd 50 ns SK rise time (Note 14) Tr 100 ns SK fall time (Note 14) Tf 100 ns CSB high time Tch 150 ns (Note 13
47、) SO load capacitance: 20pF (Note 14) Reference value for design. 4-wire SPI CSBSKSI Tcs SO Ts Tsd Tcd Th Tdd Hi-Z Hi-Z Twh TwlTch Rise time and fall time SKTr Tf 0.9Vid 0.1Vid AK8963 MS1356-E-02 - 11 - 2013/10 5.3.5. I 2 C Bus Interface CSB pin = “H” I 2 C bus interface is compliant with Standard m
48、ode and Fast mode. Standard/Fast mode is selected automatically by fSCL. (1) Standard mode fSCL 100kHz Symbol Parameter Min. Typ. Max. Unit fSCL SCL clock frequency 100 kHz tHIGH SCL clock “High“ time 4.0 s tLOW SCL clock “Low“ time 4.7 s tR SDA and SCL rise time 1.0 s tF SDA and SCL fall time 0.3 s
49、 tHD:STA Start Condition hold time 4.0 s tSU:STA Start Condition setup time 4.7 s tHD:DAT SDA hold time (vs. SCL falling edge) 0 s tSU:DAT SDA setup time (vs. SCL rising edge) 250 ns tSU:STO Stop Condition setup time 4.0 s tBUF Bus free time 4.7 s (2) Fast mode 100kHzfSCL 400kHz Symbol Parameter Min. Typ. Max. Unit fSCL SCL clock frequency 400 kHz tHIGH SCL clock “High“ time 0.6 s tLOW SCL clock “Low“ time 1.3 s tR SDA and SCL rise time 0.3 s tF SDA an
