Data Sheet

MMA8452Q
Sensors
Freescale Semiconductor, Inc. 41
Table 66. MMA8452Q Register Map
Reg Name Definition Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
00 STATUS Data Status R ZYXOW ZOW YOW XOW ZYXDR ZDR YDR XDR
01 OUT_X_MSB 12-bit X Data R XD11 XD10 XD9 XD8 XD7 XD6 XD5 XD4
02 OUT_X_LSB 12-bit X Data R XD3 XD2 XD1 XD0 0 0 0 0
03 OUT_Y_MSB 12-bit Y Data R YD11 YD10 YD9 YD8 YD7 YD6 YD5 YD4
04 OUT_Y_LSB 12-bit Y Data R YD3 YD2 YD1 YD0 0 0 0 0
05 OUT_Z_MSB 12-bit Z Data R ZD11 ZD10 ZD9 ZD8 ZD7 ZD6 ZD5 ZD4
06 OUT_Z_LSB 12-bit Z Data R ZD3 ZD2 ZD1 ZD0 0 0 0 0
0B SYSMOD System Mode R 0 0 0 0 0 0 SYSMOD1 SYSMOD0
0C INT_SOURCE Interrupt Status R SRC_ASLP 0 SRC_TRANS SRC_LNDPRT SRC_PULSE SRC_FF_MT 0 SRC_DRDY
0D WHO_AM_I ID Register R 0 0 1 0 1 0 1 0
0E XYZ_DATA_CFG Data Config R/W 0 0 0 HPF_OUT 0 0 FS1 FS0
0F HP_FILTER_CUTOFF HP Filter Setting R/W 0 0 Pulse_HPF_BYP Pulse_LPF_EN 0 0 SEL1 SEL0
10 PL_STATUS PL Status R NEWLP LO 0 0 0 LAPO[1] LAPO[0] BAFRO
11 PL_CFG PL Configuration R/W DBCNTM PL_EN 0 0 0 0 0 0
12 PL_COUNT PL DEBOUNCE R/W DBNCE[7] DBNCE[6] DBNCE[5] DBNCE[4] DBNCE[3] DBNCE[2] DBNCE[1] DBNCE[0]
13 PL_BF_ZCOMP
PL Back/Front Z Comp
R
BKFR[1] BKFR[0] 0 0 0 ZLOCK[2] ZLOCK[1] ZLOCK[0]
14 P_L_THS_REG PL THRESHOLD R P_L_THS[4] P_L_THS[3] P_L_THS[2] P_L_THS[1] P_L_THS[0] HYS[2] HYS[1] HYS[0]
15 FF_MT_CFG
Freefall/Motion Config
R/W
ELE OAE ZEFE YEFE XEFE 0 0 0
16 FF_MT_SRC
Freefall/Motion Source
R
EA 0 ZHE ZHP YHE YHP XHE XHP
17 FF_MT_THS
Freefall/Motion
Threshold
R/W
DBCNTM THS6 THS5 THS4 THS3 THS2 THS1 THS0
18 FF_MT_COUNT
Freefall/Motion
Debounce
R/W
D7 D6 D5 D4 D3 D2 D1 D0
1D TRANSIENT_CFG Transient Config R/W 0 0 0 ELE ZTEFE YTEFE XTEFE HPF_BYP
1E TRANSIENT_SRC Transient Source R 0 EA ZTRANSE Z_Trans_Pol YTRANSE Y_Trans_Pol XTRANSE X_Trans_Pol
1F TRANSIENT_THS Transient Threshold R/W DBCNTM THS6 THS5 THS4 THS3 THS2 THS1 THS0
20 TRANSIENT_COUNT
Transient Debounce
R/W
D7 D6 D5 D4 D3 D2 D1 D0
21 PULSE_CFG Pulse Config R/W DPA ELE ZDPEFE ZSPEFE YDPEFE YSPEFE XDPEFE XSPEFE
22 PULSE_SRC Pulse Source R EA AxZ AxY AxX DPE Pol_Z Pol_Y Pol_X
23 PULSE_THSX Pulse X Threshold R/W 0 THSX6 THSX5 THSX4 THSX3 THSX2 THSX1 THSX0
24 PULSE_THSY Pulse Y Threshold R/W 0 THSY6 THSY5 THSY4 THSY3 THSY2 THSY1 THSY0
25 PULSE_THSZ Pulse Z Threshold R/W 0 THSZ6 THSZ5 THSZ4 THSZ3 THSZ2 THSZ1 THSZ0
26 PULSE_TMLT Pulse First Timer R/W TMLT7 TMLT6 TMLT5 TMLT4 TMLT3 TMLT2 TMLT1 TMLT0
27 PULSE_LTCY Pulse Latency R/W LTCY7 LTCY6 LTCY5 LTCY4 LTCY3 LTCY2 LTCY1 LTCY0
28 PULSE_WIND
Pulse 2nd Window
R/W
WIND7 WIND6 WIND5 WIND4 WIND3 WIND2 WIND1 WIND0
29 ASLP_COUNT
Auto-SLEEP Counter
R/W
D7 D6 D5 D4 D3 D2 D1 D0
2A CTRL_REG1 Control Reg1 R/W ASLP_RATE1 ASLP_RATE0 DR2 DR1 DR0 LNOISE F_READ ACTIVE
2B CTRL_REG2 Control Reg2 R/W ST RST 0 SMODS1 SMODS0 SLPE MODS1 MODS0
2C CTRL_REG3
Control Reg3
(WAKE Interrupts from
SLEEP) R/W
0 WAKE_TRANS WAKE_LNDPRT WAKE_PULSE WAKE_FF_MT 0 IPOL PP_OD
2D CTRL_REG4
Control Reg4
(Interrupt Enable Map)
R/W
INT_EN_ASLP 0 INT_EN_TRANS INT_EN_LNDPRT INT_EN_PULSE INT_EN_FF_MT 0 INT_EN_DRDY