MMA8653FC datasheet(22/56 Pages) FREESCALE

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MMA8653FC

Sensors

Freescale Semiconductor, Inc.

6.3

Data registers

The following are the data registers for the MMA8653FC. For more information about data manipulation of the MMA8653FC, see

application note, AN4083.

6.3.1

0x00: STATUS, Data Status Register

This register contains the X, Y, Z data overwrite and data ready flags.

Figure 15. 0x00: STATUS, Data Status Register (Read Only)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ZYXOW

ZOW

YOW

XOW

ZYXDR

ZDR

YDR

XDR

Table 13. STATUS register bits

Field

Description

ZYXOW

X, Y, Z-axis Data Overwrite. Default value: 0

ZYXOW is set whenever a new acceleration data is produced before completing the retrieval of the previous set. This event

occurs when the content of at least one acceleration data register (i.e., OUT_X, OUT_Y, OUT_Z) has been overwritten.

ZYXOW is cleared when the high-bytes of the acceleration data (OUT_X_MSB, OUT_Y_MSB, OUT_Z_MSB) of all the

channels are read.

0: No data overwrite has occurred

1: Previous X, Y, or Z data was overwritten by new X, Y, or Z data before it was read

ZOW

Z-axis Data Overwrite. Default value: 0

ZOW is set whenever a new acceleration sample related to the Z-axis is generated before the retrieval of the previous

sample. When this occurs the previous sample is overwritten. ZOW is cleared anytime OUT_Z_MSB register is read.

0: No data overwrite has occurred

1: Previous Z-axis data was overwritten by new Z-axis data before it was read

YOW

Y-axis Data Overwrite. Default value: 0

YOW is set whenever a new acceleration sample related to the Y-axis is generated before the retrieval of the previous

sample. When this occurs the previous sample is overwritten. YOW is cleared anytime OUT_Y_MSB register is read.

0: No data overwrite has occurred

1: Previous Y-axis data was overwritten by new Y-axis data before it was read

XOW

X-axis Data Overwrite. Default value: 0

XOW is set whenever a new acceleration sample related to the X-axis is generated before the retrieval of the previous

sample. When this occurs the previous sample is overwritten. XOW is cleared any time OUT_X_MSB register is read.

0: No data overwrite has occurred

1: Previous X-axis data was overwritten by new X-axis data before it was read

ZYXDR

X, Y, Z-axis new Data Ready. Default value: 0

ZYXDR signals that a new sample for any of the enabled channels is available. ZYXDR is cleared when the high-bytes of

the acceleration data (OUT_X_MSB, OUT_Y_MSB, OUT_Z_MSB) of all the channels are read.

0: No new set of data ready

1: A new set of data is ready

ZDR

Z-axis new Data Available. Default value: 0

ZDR is set whenever a new acceleration sample related to the Z-axis is generated. ZDR is cleared any time OUT_Z_MSB

0: No new Z-axis data is ready

1: A new Z-axis data is ready

YDR

Y-axis new Data Available. Default value: 0

YDR is set whenever a new acceleration sample related to the Y-axis is generated. YDR is cleared any time OUT_Y_MSB

0: No new Y-axis data ready

1: A new Y-axis data is ready

XDR

X-axis new Data Available. Default value: 0

XDR is set whenever a new acceleration sample related to the X-axis is generated. XDR is cleared any time OUT_X_MSB

0: No new X-axis data ready

1: A new X-axis data is ready

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