Rainbow Electronics DAB-GPS-C01 User Manual

AMS0805WAH

CATALOG No.:

2008.03

AMS0805WAH

Motion Sensor Data Sheet

Ver. 1.3

Advanced Material on Technolog y

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.
Therefore, motion sensor is suitable for deployment in hand-held devices, where diverse
movements are constantly expected, in order to acquire accurate positioning and direction data.

Features

● a 3-axis accelerometer, a 3-axis magnetic sensor

● an internal micro-processor

● Built-in software (for auto-calibration)

● Serial interface: IIC, SPI

● Size: 7 X 9 X 1.2 (mm)

● iRAC (Intelligent Real time Automatic Calibration)

- Automatic offset compensation

- Automatic temperature compensation

- Automatic sensitivity calibration

- Automatic calibration for magnetic field disturbance

● Maximum sampling rate : 30Hz

● Low power: less than 9 mA in active

less than 20 uA in all power down mode

Applications

● Personal Navigation in mobile phone

● Calorie counter

● Constellation seeking device

● Robot motion control

● 3-D presenter

● Game controller

2

Functional Block Diagram

Absolute Maximum Ratings

Item Symbol Min. Max. Unit Description

DC Supply Voltage

(DVDD,DVDDIO,AVDD)

Storage Temperature

Range

Mechanical Shock - - + 4,600 g

ESD - - + 2,000 V

- - 0.3 + 4 V

- - 55 + 125 ℃

AMS0805WAH

MOTION SENSOR

Recommended Operating Conditions

Item Symbol Min. Max. Unit Description

Operating DVDD Supply

Voltage Range

Operating AVDD Supply

Voltage Range

Operating DVDDIO

Supply Voltage Range

Operating Temperature

Range

- + 2.7 + 3.4 V

- + 2.7 + 3.4 V

- + 1.8 + 3.4 V

- - 20 + 85 ℃

3

Compass Specifications

Item Min. Typ. Max. Unit Description

Azimuth accuracy - 5 - + 5 degree

Azimuth range 0 - 359 degree

Azimuth resolution - 1 - degree

Flux density measurement

range

Maximum sampling rate - - 30 Hz

Power consumption - - 27 mW Power down : 60 uW(@ 3.0 V)

Roll/pitch compensation

range

Roll/pitch resolution - 1 - degree

Roll/pitch accuracy - 5 - + 5 degree

- 1,000 - + 1,000 μT

- 89 - + 89 degree

DC characteristics

At. DVDD & DVDDIO = 2.7~3.4V Ta= -20 ~85℃℃

Item Symbol Min. Max. Unit Description

Input high voltage 1 VIH1 0.7 x DVDD DVDD + 0.6 V All Digital I/O Port except RESET

Input high voltage 2 VIH2 0.9 x DVDD DVDD + 0.6 V /RESET(Schmitt input)

Input low voltage 1 VIL1 -0.5 0.3 x DVDD V All Digital I/O Port except RESET

Input low voltage 2 VIL2 -0.5 0.3 x DVDD V /RESET(Schmitt input)

IIC characteristics

At. DVDDIO = 2.7~3.4V Ta= -20 ~85℃℃

Parameter Max. Units Description

Clock Frequency 400 kHz SCL

Sink Current 2 mA SDA, SCL

AMS0805WAH

MOTION SENSOR

SPI characteristics

At. DVDDIO = 2.7~3.4V Ta= -20 ~85℃℃

Parameter Max. Units Description

Clock Frequency 1 MHz SCK

4

A

A

A

A

A

A

A

Pin Descriptions

● Serial Interface

Pin name Pin No. Pin type Initial Function

NC / /SS 3 DI

NC / MOSI 2 DI

SDA / MISO 1 DIO / DO

SCL / SCK 4 DI - Clock.

IIC / SPI 7 DI - L : SPI, H : IIC

3-states

H

3-states

H
Z
H

● Power

Pin name Pin No. Pin type Function

DVDD 12,18 PWR Digital power supply

DVDDIO 13 PWR Digital I/O power supply (See page )

DVSS 5,14,22 PWR GND for digital.

VDD 8 PWR
VSS 10 PWR GND for analog.

● NC for only Testing

Pin name Pin No. Function

NC 9,11,15,16 For only test

● Etc

Pin name Pin No. Pin type Initial Function

/RESET 6 DSI H Reset pin, active "L", Schmitt input.

/WAKE_UP 17 DI H Wake up signal : active "L"

X-

xis Accelerometer analog output.

AXOUT 19 AO -

AYOUT 21 AO -

AZOUT 20 AO -

External capacitor must be connected for stable signal
( 100nF )

xis Accelerometer analog output.

Y­External capacitor must be connected for stable signal
( 100nF )

xis Accelerometer analog output.

Z­External capacitor must be connected for stable signal
( 100nF )

Note

DI: Digital input DO: Digital output

DSI: Digital Schmitt input AO: Analog output

DIO: Digital bi-directional PWR: Power

IIC mode: NC.

SPI mode: Slave - Selection pin.

IIC mode: NC.

SPI mode: Master-Output, Slave-Input.

IIC mode: SD
SPI mode: Master-Input, Slave-Output.

nalog power supply.

AMS0805WAH

MOTION SENSOR

5

AMS0805WAH

MOTION SENSOR

Package Information (unit: mm)

DVSS

22

SDA/MISO

NC/MOSI

NC//SS

SCL/SCK

DVSS

/RESET

IIC/SPI

AVDD

NC

AVSS

1

2

3

4

5

6

7

8

9

10

Top view

11

NC

21

20

19

18

17

16

15

14

13

12

AY OUT

AZ OUT

AX OUT

DVDD

/WAKE_UP

NC

NC

DVSS

DVDDIO

DVDD

1

0,2

0,8

Side view

3,5

1,2

7

0,90,80,3

21

22

1

Bottom view

9

12

10

11

6

AMS0805WAH

MOTION SENSOR

A P P E N D I X

Coordinate system

Basically, the

right thumb into the positive rotation axis and curl your fingers into the forward rotational direction.

right-hand rule

is used for determining the sign of a rotation: point your

7

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.

Typical Operating Circuit

● Typical Connection

VDD

Master Controller

(MCU)

IIC

Serial

I/F

SCL

SDA

8

SCL

Slave Device

SDA

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

Stop condition

SDA

SCL

acknowledgement. It starts by a start condition and ends by a stop condition. The first byte is the
Slave Address, the second is the Register Address and the third is the Data Byte. The LSB of the
Slave Code byte is the R/W indicator.

MASTER Transmit & SLAVE Receive

SCL

SDA

SDA SLAVE

SDA MASTER

: 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.

: To stop reading/writing operation, it is necessary to generate stop condition by

switching the SDA input from low level to high level when the SCL input is high
level. When the stop condition is generated, the operation is stopped, the data
is processed and the system enters in standby mode.

Start

Stop

● Single-Byte Write Sequence

The Single Byte Write Sequence is composed of 3 bytes of 9 bits, the 9

0

0S65

1

MSB LSB MSB LSB MSB LSB

10100XW0S6

00XWA

1

Slave address

765

AAA

3

4

Command

5

4321076

21

0A

7P

th

bit being the

3

4

21

Data

5

432107P

0A

9