PMMA7450LR2 Freescale Semiconductor, Inc, PMMA7450LR2 Datasheet - Page 17

• Manufacturer Part Number: PMMA7450LR2
• Description: ?2g/?4g/?8g Three Axis Low-g Digital Output Accelerometer
• Manufacturer: Freescale Semiconductor, Inc

$14: Offset drift Z LSB (Read/Write)
$15: Offset drift Z MSB (Read/Write)
$16: Mode control register (Read/Write)
Sensors
Freescale Semiconductor
ZOFF[7]
Weight
(*Note)
Weight
(*Note)
Signed byte data (2’s compliment): User level offset trim value for Z axis
*Note: Bit weight is for 2g 8bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics”
section.
Signed byte data (2’s compliment): User level offset trim value for Z axis
*Note: Bit weight is for 2g 8bit data output. Typical value for reference only. Variation is specified in “Electrical Characteristics”
section.
GLVL [1:0]
00: 8G is selected for measurement range. Detection is
8G range.
01: 4G is selected for measurement range. Detection is
8G range.
10: 2G is selected for measurement range. Detection is
8G range.
STON
0: Self test is not enabled
1: Self test is enabled
D7
Bit
D7
D7
--
--
0
0
0
Bit
MODE[1:0]
ZOFF[6]
ZOFF[7]
00
01
10
11
64 LSB
DRPD
ZOFF[10]
D6
D6
D6
0
--
0
Polarity
0
ZOFF[5]
ZOFF[6]
32 LSB
SPI3W
D5
D5
D5
--
0
0
0
ZOFF[9]
256 LSB
ZOFF[4]
ZOFF[5]
16 LSB
STON
D4
D4
D4
--
0
0
0
Pulse Detection Mode
Level Detection Mode
Measurement Mode
128 LSB
ZOFF[8]
Standby Mode
Function
ZOFF[3]
ZOFF[4]
GLVL[1]
8 LSB
D3
D3
D3
0
--
0
0
ZOFF[10]
ZOFF[2]
ZOFF[3]
GLVL[0]
4 LSB
D2
D2
D2
0
0
0
MODE[1]
ZOFF[1]
ZOFF[2]
ZOFF[9]
2 LSB
D1
D1
D1
0
0
0
SPI3W
DRPD
0: Data ready status is output to INT1/DRDY PIN
1: Data ready status is not output to INT1/DRDY PIN
0: SPI is 4 wire mode
1: SPI is 3 wire mode
MODE[0]
ZOFF[0]
ZOFF[1]
ZOFF[8]
1 LSB
D0
D0
D0
0
0
0
Function
Function
Function
ZOFF[0]
0.5 LSB
Default
Default
Default
Bit
Bit
Bit
MMA7450L
17