Sensors

18

Freescale Semiconductor

MMA7455L

Signed byte data (2’s compliment): User level offset trim value for Z axis

*Note: Bit weight is for 2g 8bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics”

section.

Signed byte data (2’s compliment): User level offset trim value for Z axis

*Note: Bit weight is for 2g 8bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics”

section.

GLVL [1:0]

00: 8g is selected for measurement range.

10: 4g is selected for measurement range.

01: 2g is selected for measurement range.

STON

0: Self test is not enabled

1: Self test is enabled

SPI3W

0: SPI is 4 wire mode

1: SPI is 3 wire mode

DRPD

0: Data ready status is output to INT1/DRDY PIN

1: Data ready status is not output to INT1/DRDY PIN

$14: Offset drift Z LSB (Read/Write)

D7

D6

D5

D4

D3

D2

D1

D0

Bit

ZOFF[7]

ZOFF[6]

ZOFF[5]

ZOFF[4]

ZOFF[3]

ZOFF[2]

ZOFF[1]

ZOFF[0]

Function

0

0

0

0

0

0

0

0

Default

Bit

ZOFF[7]

ZOFF[6]

ZOFF[5]

ZOFF[4]

ZOFF[3]

ZOFF[2]

ZOFF[1]

ZOFF[0]

Weight

(*Note)

64 LSB

32 LSB

16 LSB

8 LSB

4 LSB

2 LSB

1 LSB

0.5 LSB

$15: Offset drift Z MSB (Read/Write)

D7

D6

D5

D4

D3

D2

D1

D0

Bit

--

--

--

--

--

ZOFF[10]

ZOFF[9]

ZOFF[8]

Function

0

0

0

0

0

0

0

0

Default

Bit

ZOFF[10]

ZOFF[9]

ZOFF[8]

Weight

(*Note)

Polarity

256 LSB

128 LSB

$16: Mode control register (Read/Write)

D7

D6

D5

D4

D3

D2

D1

D0

Bit

--

DRPD

SPI3W

STON

GLVL[1]

GLVL[0]

MODE[1]

MODE[0]

Function

0

0

0

0

0

0

0

0

Default

MODE[1:0]

Function

00

Standby Mode

01

Measurement Mode

10

Level Detection Mode

11

Pulse Detection Mode