SCA8X0/21X0/3100 Series

VTI Technologies Oy

3/35

www.vti.fi

Doc. Nr. 82 694 00 C

3.1.2.2

Y_MSB.........................................................................................................................................13

3.1.3

Z axis acceleration output...................................................................................................................13

3.1.3.1

Z_LSB..........................................................................................................................................13

3.1.3.2

Z_MSB.........................................................................................................................................13

3.1.4

Output data conversion.......................................................................................................................14

3.1.4.1

2g products ..................................................................................................................................14

3.1.4.2

6 g products .................................................................................................................................15

3.1.4.3

1 g products .................................................................................................................................15

3.1.5

Temperature output ............................................................................................................................15

3.1.5.1

Temperature Register Low (TEMP_LSB)....................................................................................15

3.1.5.2

Temperature Register High (TEMP_MSB) ..................................................................................16

3.1.6

Status Register (STATUS)..................................................................................................................17

3.1.7

Interrupt Status Register (INT_STATUS) ...........................................................................................17

3.2

Operation control registers.....................................................................................................18

3.2.1

Control Register (CTRL) .....................................................................................................................18

3.2.2

Reset Register (RESET).....................................................................................................................19

3.3

Identification registers ............................................................................................................19

3.3.1

Revision ID (REVID) ...........................................................................................................................19

3.3.2

Component ID (ID)..............................................................................................................................19

4

SPI Interface ......................................................................................................................20

4.1

Output of Acceleration Data ...................................................................................................21

4.1.1

Register read operation ......................................................................................................................22

4.1.2

Decremented register read operation .................................................................................................22

4.1.3

MOSI data of SPI commands .............................................................................................................23

4.2

Error Conditioning ...................................................................................................................23

4.2.1

FRME-bit.............................................................................................................................................23

4.2.2

PORST-bit...........................................................................................................................................23

4.2.3

ST-bit (SCA21X0 / 3100) ....................................................................................................................24

4.2.4

SAT-bit (SCA21X0 / 3100)..................................................................................................................24

4.2.5

aPAR-bit (SCA21X0 / 3100) ...............................................................................................................24

4.2.6

dPAR-bit..............................................................................................................................................25

4.2.7

Fixed bits.............................................................................................................................................25

4.2.8

Output data .........................................................................................................................................25

5

Electrical Characteristics .................................................................................................26

5.1

Absolute maximum ratings.....................................................................................................26

5.2

Power Supply ...........................................................................................................................26

5.3

Digital I/O Specification...........................................................................................................26

5.3.1

DC Characteristics ..............................................................................................................................26

5.3.2

AC Characteristics ..............................................................................................................................26

6

Application information ....................................................................................................28

6.1

Package dimensions ...............................................................................................................28

6.2

Output to Angle Conversion ...................................................................................................29

6.3

Measuring Directions ..............................................................................................................30

6.4

Pin Description.........................................................................................................................31

6.5

Recommended circuit diagram ..............................................................................................31

6.6

Recommended PWB layout ....................................................................................................32

6.7

Assembly instructions ............................................................................................................34