Sensors
24
Freescale Semiconductor
MMA7455L
Signed byte data (2’s complement): User level offset trim value for X-axis
*
Bit weight is for 8g 10-bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics” section.
Signed byte data (2’s complement): User level offset trim value for X-axis
Signed byte data (2’s complement): User level offset trim value for Y-axis
*
Bit weight is for 2g 8-bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics” section.
Signed byte data (2’s complement): User level offset trim value for Y-axis
*
Bit weight is for 2g 8-bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics” section.
$0F: “Who Am I” Value (Read only: Optional)
D7
D6
D5
D4
D3
D2
D1
D0
Bit
ID[7]
ID [6]
ID [5]
ID [4]
ID [3]
ID [2]
ID [1]
ID [0]
Function
0/OTP
0/OTP
0/OTP
0/OTP
0/OTP
0/OTP
0/OTP
0/OTP
Default
$10: Offset Drift X LSB (Read/Write)
The following Offset Drift Registers are used for setting and storing the offset calibrations to eliminate the 0g offset. Please refer
to Freescale application note AN3745 for detailed instructions on the process to set and store the calibration values.
D7
D6
D5
D4
D3
D2
D1
D0
Bit
XOFF[7]
XOFF [6]
XOFF [5]
XOFF [4]
XOFF [3]
XOFF [2]
XOFF [1]
XOFF [0]
Function
0
0
0
0
0
0
0
0
Default
Bit
XOFF[7]
XOFF[6]
XOFF[5]
XOFF[4]
XOFF[3]
XOFF[2]
XOFF[1]
XOFF[0]
Weight*
64 LSB
32 LSB
16 LSB
8 LSB
4 LSB
2 LSB
1 LSB
0.5 LSB
$11: Offset Drift X MSB (Read/Write)
D7
D6
D5
D4
D3
D2
D1
D0
Bit
--
--
--
--
--
XOFF [10]
XOFF [9]
XOFF [8]
Function
0
0
0
0
0
0
0
0
Default
$12: Offset Drift Y LSB (Read/Write)
D7
D6
D5
D4
D3
D2
D1
D0
Bit
YOFF[7]
YOFF [6]
YOFF [5]
YOFF [4]
YOFF [3]
YOFF [2]
YOFF [1]
YOFF [0]
Function
0
0
0
0
0
0
0
0
Default
Bit
YOFF[7]
YOFF[6]
YOFF[5]
YOFF[4]
YOFF[3]
YOFF[2]
YOFF[1]
YOFF[0]
Weight*
64 LSB
32 LSB
16 LSB
8 LSB
4 LSB
2 LSB
1 LSB
0.5 LSB
$13: Offset Drift Y MSB (Read/Write)
D7
D6
D5
D4
D3
D2
D1
D0
Bit
--
--
--
--
--
YOFF [10]
YOFF [9]
YOFF [8]
Function
0
0
0
0
0
0
0
0
Default
Bit
YOFF[10]
YOFF[9]
YOFF[8]
Weight*
Polarity
256 LSB
128 LSB
