MMA6525KW datasheet(47/56 Pages) FREESCALE

47 / 56 page

Sensor

Freescale Semiconductor, Inc.

MMA65xx

4.2

SPI Response Format

Table 30. SPI Response Message Summary

MSB

LSB

9876

543210

CMD

Response to Valid Acceleration Request

Reference

D15

D14

D11

D10

Acceleration

D11

D10

AX = Axis Requested

X-Axis Acceleration Response

Y-Axis Acceleration Response

P = Odd Parity

S[1:0] = Device Status

In Initialization (ENDINIT = ‘0’)

Normal Request

ST Active

Internal Error Present / SPI Error

CMD

D11

D10

Reference

Valid Accel Request

Accel Data

X- Axis Acceleration Data

Section 4.3

Accel Data

X- Axis Self Test Active Acceleration Data

Accel Data

X- Axis Acceleration Data, Initialization in Process (ENDINIT=’0’)

Accel Data

Y-Axis Acceleration Data

Accel Data

Y-Axis Self Test Active Acceleration Data

Accel Data

Y- Axis Acceleration Data, Initialization in Process (ENDINIT=’0’)

MSB

LSB

9876

543210

CMD

Response to Valid Register Access

Reference

D15

D14

D11

D10

1001

1110

Section 4.4.1

New Contents of Register

0010

1110

Section 4.4.2

Contents of Register

MSB

LSB

9876

543210

CMD

Error Responses

Reference

D15

D14

D11

D10

Invalid Accel

Request

110000

000000

Section 4.3

Internal

Error Present

Section 4.5.5

MISO Error

110000

000000

Section 4.5.2

SPI Error

Section 4.5.1

Invalid Register

Request

00111000

000000

Section 4.4

Self Test Error

110000

000000

Section 4.5.5

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