3
3.1
Functional Description
Customer Accessible Data Array
A customer accessible data array allows for each device to be customized. The array consists of an OTP factory programma-
ble block and read/write registers for device programmability and status. The OTP and writable register blocks incorporate inde-
pendent CRC circuitry for fault detection (reference Section 3.2 ). The writable register block includes a locking mechanism to
prevent unintended changes during normal operation. Portions of the array are reserved for factory-programmed trim values. The
customer accessible data is shown in Table 3 .
Table 3. Customer Accessible Data
Addr
Location
Register
7
6
5
4
Bit Function
3
2
1
0
Type
$00
$01
$02
$03
SN0
SN1
SN2
SN3
SN[7]
SN[15]
SN[23]
SN[31]
SN[6]
SN[14]
SN[22]
SN[30]
SN[5]
SN[13]
SN[21]
SN[29]
SN[4]
SN[12]
SN[20]
SN[28]
SN[3]
SN[11]
SN[19]
SN[27]
SN[2]
SN[10]
SN[18]
SN[26]
SN[1]
SN[9]
SN[17]
SN[25]
SN[0]
SN[8]
SN[16]
SN[24]
$04
$05
$06
$07
$08
Reserved
Reserved
FCTCFG_X
FCTCFG_Y
PN
Reserved
Reserved
STMAG_X
STMAG_Y
PN[7]
Reserved
Reserved
0
0
PN[6]
Reserved
Reserved
0
0
PN[5]
Reserved
Reserved
0
0
PN[4]
Reserved
Reserved
0
0
PN[3]
Reserved
Reserved
0
0
PN[2]
Reserved
Reserved
0
0
PN[1]
Reserved
Reserved
1
1
PN[0]
F
$09
Invalid Address: ”Invalid Register Request”
$0A
$0B
$0C
$0D
DEVCTL
DEVCFG
DEVCFG_X
DEVCFG_Y
RES_1
Reserved
ST_X
ST_Y
RES_0
Reserved
Reserved
Reserved
Reserved
ENDINIT
Reserved
Reserved
Reserved
SD
Reserved
Reserved
Reserved
OFMON
LPF_X[3]
LPF_Y[3]
Reserved
A_CFG[2]
LPF_X[2]
LPF_Y[2]
Reserved
A_CFG[1]
LPF_X[1]
LPF_Y[1]
Reserved
A_CFG[0]
LPF_X[0]
LPF_Y[0]
$0E
$0F
$10
$11
$12
$13
$14
$15
$16
$17
$1C
$1D
ARMCFGX
ARMCFGY
ARMT_XP
ARMT_YP
ARMT_XN
ARMT_YN
DEVSTAT
COUNT
OFFCORR_X
OFF_CORR_Y
Reserved
Reserved
Reserved
Reserved
AT_XP[7]
AT_YP[7]
AT_XN[7]
AT_YN[7]
UNUSED
COUNT[7]
OFFCORR_X[7]
OFFCORR_Y[7]
Reserved
Reserved
Reserved
Reserved
AT_XP[6]
AT_YP[6]
AT_XN[6]
AT_YN[6]
IDE
COUNT[6]
OFFCORR_X[6]
OFFCORR_Y[6]
Reserved
Reserved
APS_X[1]
APS_Y[1]
AT_XP[5]
AT_YP[5]
AT_XN[5]
AT_YN[5]
SDOV
COUNT[5]
OFFCORR_X[5]
OFFCORR_Y[5]
Reserved
Reserved
APS_X[0]
APS_Y[0]
AT_XP[4]
AT_YP[4]
AT_XN[4]
AT_YN[4]
DEVINIT
COUNT[4]
OFFCORR_X[4]
OFFCORR_Y[4]
Reserved
Reserved
AWS_XN[1]
AWS_YN[1]
AT_XP[3]
AT_YP[3]
AT_XN[3]
AT_YN[3]
MISOERR
COUNT[3]
OFFCORR_X[3]
OFFCORR_Y[3]
Reserved
Reserved
AWS_XN[0]
AWS_YN[0]
AT_XP[2]
AT_YP[2]
AT_XN[2]
AT_YN[2]
OFF_Y
COUNT[2]
OFFCORR_X[2]
OFFCORR_Y[2]
Reserved
Reserved
AWS_XP[1]
AWS_YP[1]
AT_XP[1]
AT_YP[1]
AT_XN[1]
AT_YN[1]
OFF_X
COUNT[1]
OFFCORR_X[1]
OFFCORR_Y[1]
Reserved
Reserved
AWS_XP[0]
AWS_YP[0]
AT_XP[0]
AT_YP[0]
AT_XN[0]
AT_YN[0]
DEVRES
COUNT[0]
OFFCORR_X[0]
OFFCORR_Y[0]
Reserved
Reserved
R/W
R
Type Codes:
F: Factory programmed OTP location
R/W:Read/Write register
R:Read-only register
N/A:Not applicable
MMA68xx
Sensors
Freescale Semiconductor, Inc.
11
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