MMA7455L(2007) 查看數據表（PDF） - Freescale Semiconductor
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MMA7455L Datasheet PDF : 27 Pages
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$14: Offset drift Z LSB (Read/Write)
D7
D6
D5
D4
D3
D2
D1
D0
ZOFF[7] ZOFF[6] ZOFF[5] ZOFF[4] ZOFF[3] ZOFF[2] ZOFF[1] ZOFF[0]
0
0
0
0
0
0
0
0
Signed byte data (2’s compliment): User level offset trim value for Z axis
Bit
Function
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
*Note: Bit weight is for 2g 8bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics”
section.
$15: Offset drift Z MSB (Read/Write)
D7
D6
D5
D4
D3
D2
D1
D0
--
--
--
--
--
ZOFF[10] ZOFF[9] ZOFF[8]
0
0
0
0
0
0
0
0
Signed byte data (2’s compliment): User level offset trim value for Z axis
Bit
Function
Default
Bit
ZOFF[10] ZOFF[9]
ZOFF[8]
Weight
(*Note)
Polarity
256 LSB 128 LSB
*Note: Bit weight is for 2g 8bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics”
section.
$16: Mode control register (Read/Write)
D7
D6
D5
D4
--
DRPD SPI3W STON
0
0
0
0
D3
GLVL[1]
0
D2
GLVL[0]
0
D1
MODE[1]
0
D0
MODE[0]
0
Bit
Function
Default
MODE[1:0]
Function
00
Standby Mode
01
Measurement Mode
10
Level Detection Mode
11
Pulse Detection Mode
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
MMA7455L
18
Sensors
Freescale Semiconductor
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