AMS0805WAH CATALOG No.: 2008.03 AMS0805WAH Motion Sensor Data Sheet Ver. 1.
AMS0805WAH MOTION SENSOR Overview Motion sensor is a 6-axis module consisting of 3-axis magnetic sensor and 3-axis accelerometer. It allows highly accurate motion detection with geomagnetic direction and tilting data. AMS0805WAH is a world’s smallest class of motion sensor module with embedded uCom. Moreover, our exclusive embedded calibration algorithm, iRAC, eliminates the need for initial manual calibrations. It also enables users to access to reliable motion data virtually anywhere.
AMS0805WAH MOTION SENSOR Functional Block Diagram Absolute Maximum Ratings Item Symbol Min. Max. Unit DC Supply Voltage (DVDD,DVDDIO,AVDD) - - 0.3 +4 V - - 55 + 125 ℃ - - + 4,600 g - - + 2,000 V Storage Temperature Range Mechanical Shock ESD Description Recommended Operating Conditions Item Symbol Min. Max. Unit Operating DVDD Supply Voltage Range - + 2.7 + 3.4 V Operating AVDD Supply Voltage Range - + 2.7 + 3.4 V Operating DVDDIO Supply Voltage Range - + 1.8 + 3.
AMS0805WAH MOTION SENSOR Compass Specifications Item Min. Typ. Max. Unit Azimuth accuracy -5 - +5 degree Azimuth range 0 - 359 degree Azimuth resolution Flux density measurement range Maximum sampling rate Power consumption Roll/pitch compensation range Roll/pitch resolution Roll/pitch accuracy - 1 - degree - 1,000 - + 1,000 μT - - 30 27 Hz mW - 89 - + 89 degree -5 1 - +5 degree degree Description Power down : 60 uW(@ 3.0 V) DC characteristics At. DVDD & DVDDIO = 2.
AMS0805WAH MOTION SENSOR Pin Descriptions ● Serial Interface Pin name Pin No. Pin type NC / /SS 3 DI NC / MOSI 2 DI SDA / MISO 1 DIO / DO SCL / SCK IIC / SPI 4 7 DI DI Initial 3-states H 3-states H Z H - Function IIC mode: NC. SPI mode: Slave - Selection pin. IIC mode: NC. SPI mode: Master-Output, Slave-Input. IIC mode: SDA SPI mode: Master-Input, Slave-Output. Clock. L : SPI, H : IIC ● Power Pin name DVDD DVDDIO DVSS AVDD AVSS Pin No.
AMS0805WAH MOTION SENSOR Package Information (unit: mm) DVSS 22 SDA/MISO 1 21 AY OUT NC/MOSI 2 20 AZ OUT NC//SS 3 19 AX OUT SCL/SCK 4 18 DVDD DVSS 5 17 /WAKE_UP /RESET 6 16 NC IIC/SPI 7 15 NC AVDD 8 14 DVSS NC 9 13 DVDDIO 12 DVDD AVSS Top view 10 11 NC 1,2 0,2 1 Side view 7 3,5 0,9 0,8 0,8 21 22 1 0,3 9 Bottom view 12 10 11 6
AMS0805WAH MOTION SENSOR APPENDIX Coordinate system Basically, the right-hand rule is used for determining the sign of a rotation: point your right thumb into the positive rotation axis and curl your fingers into the forward rotational direction.
AMS0805WAH MOTION SENSOR Typical Connection ( IIC default ) IIC Serial Peripheral Interface IIC is suited for typical micro-controller. It is designed to easily connect any µcom to IIC compliant slave. The 2 required lines on the slave side are the clock (SCL) signal and the data (SDA) signal.
AMS0805WAH MOTION SENSOR Protocol ● Transaction Rules Each data transferred on the SDA is accompanied by a pulse on the clock signal. The data on the SDA must be stable when the clock is high. The only exception is for generating start and stop. The master initiates and terminates a data transmission. Start condition: To start reading/writing operation, it is necessary to generate a start condition by switching the SDA input from high level to low level when the SCL input is high level.
AMS0805WAH MOTION SENSOR ● Single-Word Read Sequence There is no Single-Byte Read Sequence, so that "DEV_ID" and "REVNUM" should be read at word length if it would be read. In this case, upper byte of the word is "zero" and the valid data is in lower byte.
AMS0805WAH MOTION SENSOR ● Slave & Register address The 7bit field is slave code field. The last bit on the SDA is Read/Write bit. ● Slave address field Bit NAME Bit[7...0] Slave address Value Description 01010000(=0x50) Write Sequence 01010001(=0x51) Read Sequence ● Register Field Bit NAME Range Description Bit[7...
AMS0805WAH MOTION SENSOR Typical Connection ( SPI [OPTION] ) SPI Serial Peripheral Interface (Original SPI) The Serial Peripheral Interface (SPI) is a 4-wire Clock Synchronous Serial Interface. It is designed to easily connect any CPU to SPI compliant slaves using only 3 lines plus one chip select line per slave. Few slaves can be connected on the CPU SPI. The 4 required lines on the slave side for the SPI are MISO, MOSI, SCK signal and /SS signal.
AMS0805WAH MOTION SENSOR - Typical Connection with two Slaves /CS /SS Master Controller (MCU) SCK SCK SPI Serial I/F MOSI MOSI MISO MISO Slave Device 1 /SS SCK Slave Device 2 MOSI MISO Protocol The data format is MSB in first and LSB in last.
AMS0805WAH MOTION SENSOR ● Multi Byte Read Sequence /SS SCK MOSI 7 6 5 4 3 2 MSB 1 0 LSB Commend & Register Byte MISO 7 MSB 6 5 4 3 2 Data Byte 1 (Adress) 14 1 0 7 LSB MSB 6 5 4 3 Data Byte 2 (Address + 1) 2 1 0 LSB
AMS0805WAH MOTION SENSOR Register Table Register Symbol R/W Explanation 01(h) DEV_ID R Device ID 02(h) REVNUM R Revision Number 03(h) MAG_STATUS R Big Magnetic Field Status Flag 14(h) POWER W Power Down Mode 20(h) AZIMUTH_H R MSB of AZIMUTH 21(h) AZIMUTH_L R LSB of AZIMUTH 22(h) MAG_XH R MSB of Magnetic Sensor X axis 23(h) MAG_XL R LSB of Magnetic Sensor X axis 24(h) MAG_YH R MSB of Magnetic Sensor Y axis 25(h) MAG_YL R LSB of Magnetic Sensor Y axis 26(h) MAG_ZH
AMS0805WAH MOTION SENSOR Register Descriptions 01(h) "DEV_ID" Device ID Register Device ID 04H 02(h) Revision number Register "REVNUM" Revision number 03(h) "MAG_ALARM" 20H External Big Magnetic Field Status Flag - No External Big Magnetic Field condition 00H - External Big Magnetic Field condition 01H This register is operated over than 0.4gauss external magnetic field distortion.
AMS0805WAH MOTION SENSOR 28(h) ~ 29(h) "CAL_X" - Slope compensated X axis Magnetic flux density value 2A(h) ~ 2B(h) "CAL_Y" - Slope compensated Y axis Magnetic flux density value 2C(h) ~ 2D(h) "ACC_X" - X axis Acceleration value - Data range: - 2,048 ~ 2,047 - Resolution: 1 counts = 0.01225m/s2 2E(h) ~ 2F(h) "ACC_Y" - X axis Acceleration value - Data range: -2,048 ~ 2,047 - Resolution: 1 counts = 0.
AMS0805WAH MOTION SENSOR 18
AMS0805WAH MOTION SENSOR Communication specification and software applications (IIC) Communication mode : IIC serial interface. Communication speed : Maximum 400 kHz(Fast mode) Operation is not guaranteed for exceeding this speed. Pulse width More than 2.
AMS0805WAH MOTION SENSOR Communication specification and software applications (SPI) Communication mode : SPI serial interface. Communication speed : Maximum 1.5 MHz Operation is not guaranteed for exceeding this speed.
AMS0805WAH MOTION SENSOR Wake-up from power down mode we serve two type of wake-up functions(using /WAKE_UP signal [ for SPI ] or using IIC communication at Address match [ for IIC ] ) ● Using /WAKE_UP signal 21
AMS0805WAH MOTION SENSOR ● Using IIC communication 22
AMS0805WAH MOTION SENSOR AMS0805WAH Accelerometer Offset Calibration Mode Manual The accelerometer’s offset can be changed a little value, because of big shock, very high temperature by soldering etc. For the more precision azimuth and tilt, we need to calibrate accelerometer’s offset. AMS0805WAH supports ACC offset calibration mode. It is that you can calibrate accelerometer’s offset in this mode. The calibration sequence is below. - Put AMS0805WAH(or product) on a table.
AMS0805WAH MOTION SENSOR Interval time More than 50us Interval time More than 50us Completely & slowly Rotates AMS0805WAH on a table. S 0x50 A 0xAA A 0x55 A P S ... START the ACC offset CAL mode Go back to Normal mode within 50ms Interval time More than 50us ... P S 0x50 Interval time More than 50us A 0xAA A 0x55 A P S ...
AMS0805WAH MOTION SENSOR Interval time More than 50us /SS Completely & slowly Rotates AMS0805WAH on a table. SCK MOSI 0xAA 0x55 ... START the ACC offset CAL mode Go back to Normal mode within 50ms Interval time More than 50us /SS SCK MOSI 0xAA 0x55 ...
AMS0805WAH MOTION SENSOR AMS0805WAH Table AMS0805WAH Table θ Although the table has some tilt, you can calibrate accelerometer’s offset. Note : Don’t shake and give any tilt when AMS0805WAH is in the ACC offset CAL mode.
AMS0805WAH MOTION SENSOR Data format in the ACC offset CAL mode.
AMS0805WAH MOTION SENSOR IMPORTANT N OTICE *Specifications are subject to change without prior notification AM OSEN SE C O., LT D.
