MMA7455L Просмотр технического описания (PDF) - Freescale Semiconductor
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MMA7455L Datasheet PDF : 35 Pages
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Table 9. User Register Summary
Address Name
Definition
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
$00
XOUTL
10 bits output value X LSB
XOUT[7] XOUT[6] XOUT[5] XOUT[4] XOUT[3] XOUT[2] XOUT[1] XOUT[0]
$01
XOUTH
10 bits output value X MSB
--
--
--
--
--
--
XOUT[9] XOUT[8]
$02
YOUTL
10 bits output value Y LSB
YOUT[7] YOUT[6] YOUT[5] YOUT[4] YOUT[3] YOUT[2] YOUT[1] YOUT[0]
$03
YOUTH
10 bits output value Y MSB
--
--
--
--
--
--
YOUT[9] YOUT[8]
$04
ZOUTL
10 bits output value Z LSB
ZOUT[7] ZOUT[6] ZOUT[5] ZOUT[4] ZOUT[3] ZOUT[2] ZOUT[1] ZOUT[0]
$05
ZOUTH
10 bits output value Z MSB
--
--
--
--
--
--
ZOUT[9] ZOUT[8]
$06
XOUT8
8 bits output value X
XOUT[7] XOUT[6] XOUT[5] XOUT[4] XOUT[3] XOUT[2] XOUT[1] XOUT[0]
$07
YOUT8
8 bits output value Y
YOUT[7] YOUT[6] YOUT[5] YOUT[4] YOUT[3] YOUT[2] YOUT[1] YOUT[0]
$08
ZOUT8
8 bits output value Z
ZOUT[7] ZOUT[6] ZOUT[5] ZOUT[4] ZOUT[3] ZOUT[2] ZOUT[1] ZOUT[0]
$09
STATUS
Status registers
--
--
--
--
--
PERR DOVR DRDY
$0A
DETSRC
Detection source registers
LDX
LDY
LDZ
PDX
PDY
PDZ
INT2
INT1
$0B
TOUT
“Temperature output value” (Optional) TMP[7] TMP[6] TMP[5] TMP[4] TMP[3] TMP[2] TMP[1] TMP[0]
$0C
$0D
I2CAD
(Reserved)
I2C device address
--
I2CDIS
--
DAD[6]
--
DAD[5]
--
DAD[4]
--
DAD[3]
--
DAD[2]
--
DAD[1]
--
DAD[0]
$0E
USRINF
User information (Optional)
UI[7]
UI[6]
UI[5]
UI[4]
UI[3]
UI[2]
UI[1]
UI[0]
$0F
WHOAMI
“Who am I” value (Optional)
ID[7]
ID[6]
ID[5]
ID[4]
ID[3]
ID[2]
ID[1]
ID[0]
$10
XOFFL
Offset drift X value (LSB)
XOFF[7] XOFF[6] XOFF[5] XOFF[4] XOFF[3] XOFF[2] XOFF[1] XOFF[0]
$11
XOFFH
Offset drift X value (MSB)
--
--
--
--
--
XOFF[10] XOFF[9] XOFF[8]
$12
YOFFL
Offset drift Y value (LSB)
YOFF[7] YOFF[6] YOFF[5] YOFF[4] YOFF[3] YOFF[2] YOFF[1] YOFF[0]
$13
YOFFH
Offset drift Y value (MSB)
--
--
--
--
--
YOFF[10] YOFF[9] YOFF[8]
$14
ZOFFL
Offset drift Z value (LSB)
ZOFF[7] ZOFF[6] ZOFF[5] ZOFF[4] ZOFF[3] ZOFF[2] ZOFF[1] ZOFF[0]
$15
ZOFFH
Offset drift Z value (MSB)
--
--
--
--
--
ZOFF[10] ZOFF[9] ZOFF[8]
$16
MCTL
Mode control
--
DRPD SPI3W STON GLVL[1] GLVL[0] MOD[1] MOD[0]
$17
INTRST
Interrupt latch reset
--
--
--
--
--
--
CLRINT2 CLRINT1
$18
CTL1
Control 1
DFBW THOPT ZDA
YDA
XDA INTRG[1] INTRG[0] INTPIN
$19
CTL2
Control 2
--
--
--
--
--
DRVO
PDPL
LDPL
$1A
LDTH
Level detection threshold limit value LDTH[7] LDTH[6] LDTH[5] LDTH[4] LDTH[3] LDTH[2] LDTH[1] LDTH[0]
$1B
PDTH
Pulse detection threshold limit value PDTH[7] PDTH[6] PDTH[5] PDTH[4] PDTH[3] PDTH[2] PDTH[1] PDTH[0]
$1C
PW
Pulse duration value
PD[7]
PD[6]
PD[5]
PD[4]
PD[3]
PD[2]
PD[1]
PD[0]
$1D
LT
$1E
TW
Latency time value
Time window for 2nd pulse value
LT[7]
TW[7]
LT[6]
TW[6]
LT[5]
TW[5]
LT[4]
TW[4]
LT[3]
TW[3]
LT[2]
TW[2]
LT[1]
TW[1]
LT[0]
TW[0]
$1F
(Reserved)
--
--
--
--
--
--
--
--
REGISTER DEFINITIONS
$00: 10bits Output Value X LSB (Read only)
D7
XOUT [7]
0
D6
XOUT [6]
0
D5
XOUT [5]
0
D4
XOUT [4]
0
D3
XOUT [3]
0
D2
XOUT [2]
0
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.
D1
XOUT [1]
0
D0
XOUT[0]
0
Bit
Function
Default
Sensors
Freescale Semiconductor
MMA7455L
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