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MMA8491Q Datasheet(PDF) 16 Page - Freescale Semiconductor, Inc

Part No. MMA8491Q
Description  Xtrinsic MMA8491Q 3-Axis Multifunction Digital Accelerometer
Download  26 Pages
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MMA8491Q Datasheet(HTML) 16 Page - Freescale Semiconductor, Inc

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MMA8491Q
Sensors
16
Freescale Semiconductor, Inc.
5
Register Descriptions
5.1
Register address map
5.2
Register bit map
Table 10. Register address map(1)(2)
1. Register contents are preserved when EN pin is set high after sampling.
2. Register contents are reset when EN pin is set low.
Name
Type
Register Address
Auto-Increment Address(3)
3. Auto-increment is the I2C feature that the I2C read address is automatically updated after each read. Auto-increment addresses which are not
a simple increment are highlighted in bold. The auto-increment addressing is only enabled when device registers are read using I2C burst
read mode. Therefore the internal storage of the auto-increment address is cleared whenever a stop-bit is detected.
Default
Comment
STATUS
R
0x00
0x01
0x00
Read time status
OUT_X_MSB
R
0x01
0x02
Output
[7:0] are 8 MSBs of the 14-bit sample
OUT_X_LSB
R
0x02
0x03
Output
[7:2] are the 6 LSB of 14-bit sample
OUT_Y_MSB
R
0x03
0x04
Output
[7:0] are 8 MSBs of the 14-bit sample
OUT_Y_LSB
R
0x04
0x05
Output
[7:2] are the 6 LSB of 14-bit sample
OUT_Z_MSB
R
0x05
0x06
Output
[7:0] are 8 MSBs of the 14-bit sample
OUT_Z_LSB
R
0x06
0x00
Output
[7:2] are the 6 LSB of 14-bit sample
Table 11. Register bit map
Address Offset
Name
7
6
5
4
3
2
1
0
0x00
STATUS
R
0
0
0
0
ZYXDR
ZDR
YDR
XDR
0x01
OUT_X_MSB
R
XD[13:6]
0x02
OUT_X_LSB
R
XD[5:0]
0
0
0x03
OUT_Y_MSB
R
YD[13:6]
0x04
OUT_Y_LSB
R
YD[5:0]
0
0
0x05
OUT_Z_MSB
R
ZD[13:6]
0x06
OUT_Z_LSB
R
ZD[5:0]
0
0


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