MMA7456LT Freescale Semiconductor, MMA7456LT Datasheet - Page 21

• Manufacturer Part Number: MMA7456LT
• Description: Board Mount Accelerometers 3-AXIS DIGTL 12C&SP1
• Manufacturer: Freescale Semiconductor
• Series: -r

Specifications of MMA7456LT

• Sensing Axis: X, Y, Z
• Acceleration: 2 g, 4 g, 8 g
• Sensitivity: 64 count/g, 32 count/g, 16 count/g
• Package / Case: LGA-14
• Output Type: Digital
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.4 V
• Supply Current: 400 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Axis: X, Y, Z
• Acceleration Range: ± 2g, 4g, 8g
• Voltage - Supply: 2.4 V ~ 3.6 V
• Bandwidth: 6kHz - XY, 3.4kHz - Z
• Interface: I²C, SPI
• Mounting Type: Surface Mount
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

REGISTER DEFINITIONS
$00: 10bits Output Value X LSB (Read only)
Signed byte data (2’s complement): 0g = 10’h000
Reading low byte XOUTL latches high byte XOUTH to allow 10-bit reads.
XOUTH should be read directly following XOUTL read.
Sensors
Freescale Semiconductor
Table 9. User Register Summary
Address
XOUT [7]
$0A
$0B
$0C
$0D
$0E
$1A
$1B
$1C
$1D
$1E
$00
$01
$02
$03
$04
$05
$06
$07
$08
$09
$0F
$10
$11
$12
$13
$14
$15
$16
$17
$18
$19
$1F
D7
0
WHOAMI
DETSRC
STATUS
USRINF
INTRST
XOUTL
XOUTH
YOUTL
YOUTH
ZOUTH
XOUT8
YOUT8
XOFFH
YOFFH
ZOFFH
ZOUTL
ZOUT8
XOFFL
YOFFL
ZOFFL
Name
I2CAD
TOUT
MCTL
PDTH
LDTH
CTL1
CTL2
PW
TW
LT
XOUT [6]
D6
0
“Temperature output value” (Optional)
Pulse detection threshold limit value
Level detection threshold limit value
Time window for 2
“Who am I” value (Optional)
10 bits output value X MSB
10 bits output value Y MSB
10 bits output value Z MSB
User information (Optional)
10 bits output value X LSB
10 bits output value Y LSB
10 bits output value Z LSB
Detection source registers
Offset drift X value (MSB)
Offset drift Y value (MSB)
Offset drift Z value (MSB)
Offset drift X value (LSB)
Offset drift Y value (LSB)
Offset drift Z value (LSB)
8 bits output value X
8 bits output value Y
8 bits output value Z
Pulse duration value
Interrupt latch reset
I
Latency time value
2
XOUT [5]
Status registers
C device address
Mode control
Definition
(Reserved)
(Reserved)
Control 1
Control 2
D5
0
nd
pulse value
XOUT [4]
D4
0
XOUT[7]
YOUT[7]
ZOUT[7]
XOUT[7]
YOUT[7]
ZOUT[7]
XOFF[7]
YOFF[7]
PDTH[7]
ZOFF[7]
LDTH[7]
TMP[7]
I2CDIS
DFBW
TW[7]
Bit 7
PD[7]
LT[7]
UI[7]
ID[7]
LDX
--
--
--
--
--
--
--
--
--
--
--
--
XOUT [3]
D3
0
XOUT[6]
YOUT[6]
ZOUT[6]
XOUT[6]
YOUT[6]
ZOUT[6]
PDTH[6]
XOFF[6]
YOFF[6]
ZOFF[6]
LDTH[6]
THOPT
TMP[6]
DAD[6]
DRPD
TW[6]
Bit 6
PD[6]
LT[6]
UI[6]
ID[6]
LDY
--
--
--
--
--
--
--
--
--
--
--
XOUT[5]
YOUT[5]
ZOUT[5]
XOUT[5]
YOUT[5]
ZOUT[5]
XOFF[5]
YOFF[5]
PDTH[5]
ZOFF[5]
LDTH[5]
TMP[5]
DAD[5]
XOUT [2]
SPI3W
TW[5]
Bit 5
PD[5]
LT[5]
UI[5]
ID[5]
LDZ
ZDA
--
--
--
--
--
--
--
--
--
--
--
D2
0
XOUT[4]
YOUT[4]
ZOUT[4]
XOUT[4]
YOUT[4]
ZOUT[4]
PDTH[4]
XOFF[4]
YOFF[4]
ZOFF[4]
LDTH[4]
TMP[4]
DAD[4]
STON
TW[4]
Bit 4
PD[4]
LT[4]
UI[4]
ID[4]
PDX
YDA
--
--
--
--
--
--
--
--
--
--
--
XOUT [1]
D1
XOUT[3]
YOUT[3]
ZOUT[3]
XOUT[3]
YOUT[3]
ZOUT[3]
XOFF[3]
YOFF[3]
PDTH[3]
ZOFF[3]
GLVL[1]
LDTH[3]
0
TMP[3]
DAD[3]
TW[3]
Bit 3
PD[3]
LT[3]
PDY
UI[3]
ID[3]
XDA
--
--
--
--
--
--
--
--
--
--
--
XOFF[10]
YOFF[10]
ZOFF[10]
INTRG[1] INTRG[0]
XOUT[2]
YOUT[2]
ZOUT[2]
XOUT[2]
YOUT[2]
ZOUT[2]
PDTH[2]
XOFF[2]
YOFF[2]
ZOFF[2]
GLVL[0]
LDTH[2]
TMP[2]
DAD[2]
PERR
DRVO
TW[2]
Bit 2
PD[2]
LT[2]
UI[2]
ID[2]
PDZ
XOUT[0]
--
--
--
--
--
--
D0
0
CLRINT2 CLRINT1
XOUT[1]
XOUT[9]
YOUT[1]
YOUT[9]
XOUT[1]
YOUT[1]
ZOUT[1]
ZOUT[9]
ZOUT[1]
XOFF[1]
XOFF[9]
YOFF[1]
YOFF[9]
ZOFF[1]
ZOFF[9]
LDTH[1]
PDTH[1]
MOD[1]
TMP[1]
DAD[1]
DOVR
TW[1]
PDPL
PD[1]
Bit 1
INT2
LT[1]
UI[1]
ID[1]
--
--
MMA7456L
Function
Default
XOUT[0]
XOUT[8]
YOUT[0]
YOUT[8]
ZOUT[0]
ZOUT[8]
XOUT[0]
YOUT[0]
ZOUT[0]
PDTH[0]
XOFF[0]
XOFF[8]
YOFF[0]
YOFF[8]
ZOFF[0]
ZOFF[8]
LDTH[0]
MOD[0]
INTPIN
TMP[0]
DAD[0]
Bit
DRDY
TW[0]
Bit 0
LDPL
PD[0]
LT[0]
INT1
UI[0]
ID[0]
--
--
21