MMA8452QR1 Freescale Semiconductor, MMA8452QR1 Datasheet - Page 21

• Manufacturer Part Number: MMA8452QR1
• Description: Board Mount Accelerometers LOW G 3-AXIS 12BT EX VLT
• Manufacturer: Freescale Semiconductor

Specifications of MMA8452QR1

• Sensing Axis: X, Y, Z
• Acceleration: 2 g, 4 g, 8 g
• Digital Output - Number Of Bits: 8 bit, 12 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.95 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Digital Output - Bus Interface: I2C
• Shutdown: Yes
• Sensitivity: 256 count/g, 512 count/g, 1024 count/g
• Package / Case: QFN-16
• Output Type: Digital
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Acceleration Range: ± 2g, ± 4g, ± 8g
• No. Of Axes: 3
• Ic Interface Type: I2C
• Sensor Case Style: QFN
• No. Of Pins: 16
• Supply Voltage Range: 1.95V To 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Table 11. Register Address Map
Sensors
Freescale Semiconductor
HP_FILTER_CUTOFF
TRANSIENT_COUNT
TRANSIENT_CFG
TRANSIENT_SRC
TRANSIENT_THS
XYZ_DATA_CFG
FF_MT_COUNT
PL_BF_ZCOMP
P_L_THS_REG
INT_SOURCE
PULSE_THSX
PULSE_THSY
OUT_X_MSB
OUT_Y_MSB
OUT_Z_MSB
FF_MT_CFG
FF_MT_SRC
PULSE_CFG
PULSE_SRC
OUT_X_LSB
OUT_Y_LSB
OUT_Z_LSB
PL_STATUS
FF_MT_THS
PL_COUNT
SYSMOD
WHO_AM_I
STATUS
PL_CFG
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Name
Register Descriptions
(1)(2)
(1)(3)
(1)(2)
(1)(3)
(1)(2)
(1)(2)
(1)(2)
(1)(2)
(1)(3)
(1)(2)
(1)(3)
(1)(2)
(1)(2)
(1)(2)
(1)(3)
(1)(2)
(1)
(1)(2)
(1)(3)
(1)(3)
(1)(3)
(1)(3)
(1)(3)
(1)(3)
(1)(3)
(1)(2)
(1)(3)
(1)(3)
(1)(3)
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Register
Address
0x0C
0x0D
0x1C
0x1D
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x0B
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1E
0x1F
0x20
0x21
0x22
0x23
0x24
F_READ=0
0x02
0x03
0x04
0x05
0x06
Auto-Increment Address
0x0C
0x0D
0x01
0x00
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1E
0x1F
0x20
0x21
0x22
0x23
0x24
0x25
—
—
—
—
—
—
F_READ=1
0x00
0x00
0x03
0x05
0x00
00000000
00000000
00000000
00101010
00000000
00000000
00000000
10000000
00000000
01000100
10000100
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
Default
Output
Output
Output
Output
Output
Output
—
—
—
—
—
—
Value
0x2A
Hex
0x00
0x00
0x00
0x00
0x00
0x00
0x80
0x00
0x44
0x84
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
—
—
—
—
—
—
—
—
—
—
—
—
[7:0] are 8 MSBs of 12-bit sample.
[7:0] are 8 MSBs of 12-bit sample.
[7:0] are 8 MSBs of 12-bit sample.
Portrait to Landscape Trip Angle is
Freefall/Motion debounce counter
[7:4] are 4 LSBs of 12-bit sample.
[7:4] are 4 LSBs of 12-bit sample.
[7:4] are 4 LSBs of 12-bit sample.
Back-Front, Z-Lock Trip threshold
ELE, Double_XYZ or Single_XYZ
Landscape/Portrait configuration.
Freefall/Motion threshold register
Cut-off frequency is set to 16 Hz
EA, Double_XYZ or Single_XYZ
Freefall/Motion functional block
Landscape/Portrait orientation
Transient event status register
Landscape/Portrait debounce
Reserved. Read return 0x00.
Reserved. Read return 0x00.
Reserved. Read return 0x00.
Reserved. Read return 0x00.
Reserved. Read return 0x00.
Reserved. Read return 0x00.
Freefall/Motion event source
HPF Data Out and Dynamic
Transient debounce counter
Transient functional block
Transient event threshold
Current System Mode
X pulse threshold
Y pulse threshold
Device ID (0x2A)
Real time status
Range Settings
Interrupt status
configuration
configuration
Comment
@ 800 Hz
counter
register
status
29°
MMA8452Q
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