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MMA6851BKW Datasheet(PDF) 11 Page - Freescale Semiconductor, Inc |
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MMA6851BKW Datasheet(HTML) 11 Page - Freescale Semiconductor, Inc |
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11 / 52 page  Sensors Freescale Semiconductor, Inc. 11 MMA685x 3 Functional Description 3.1 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. Type codes F: Factory programmed OTP location R/W: Read/write register R: Read-only register N/A: Not applicable Table 3. Customer Accessible Data Location Bit Function Type Addr Register 7 6 5 4 3 2 1 0 $00 SN0 SN[7] SN[6] SN[5] SN[4] SN[3] SN[2] SN[1] SN[0] F $01 SN1 SN[15] SN[14] SN[13] SN[12] SN[11] SN[10] SN[9] SN[8] $02 SN2 SN[23] SN[22] SN[21] SN[20]SN[19]SN[18]SN[17]SN[16] $03 SN3 SN[31] SN[30] SN[29] SN[28] SN[27] SN[26] SN[25] SN[24] $04 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved $05 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved $06 FCTCFG STMAG 0 0 0 0 0 0 0 $07 Invalid Address: “Invalid Register Request” $08 PN PN[7] PN[6] PN[5] PN[4] PN[3] PN[2] PN[1] PN[0] $09 Invalid Address: “Invalid Register Request” $0A DEVCTL RES_1 RES_0 Reserved Reserved Reserved Reserved Reserved Reserved R/W $0B DEVCFG Reserved Reserved ENDINIT SD OFMON A_CFG[2] A_CFG[1] A_CFG[0] $0C DEVCFG_X ST Reserved Reserved Reserved LPF[3] LPF[2] LPF[1] LPF[0] $0D Invalid Address: “Invalid Register Request” $0E ARMCFG Reserved Reserved APS[1] APS[0] AWS_N[1] AWS_N[0] AWS_P[1] AWS_P[0] $0F Invalid Address: “Invalid Register Request” $10 ARMT_P AT_P[7] AT_P[6] AT_P[5] AT_P[4] AT_P[3] AT_P[2] AT_P[1] AT_P[0] $11 Invalid Address: “Invalid Register Request” $12 ARMT_N AT_N[7] AT_N[6] AT_N[5] AT_N[4] AT_N[3] AT_N[2] AT_N[1] AT_N[0] $13 Invalid Address: “Invalid Register Request” $14 DEVSTAT UNUSED IDE SDOV DEVINIT MISOERR 0 OFFSET DEVRES R $15 COUNT COUNT[7] COUNT[6] COUNT[5] COUNT[4] COUNT[3] COUNT[2] COUNT[1] COUNT[0] $16 OFFCORR_X OFFCORR_X[7] OFFCORR_X[6] OFFCORR_X[5] OFFCORR_X[4] OFFCORR_X[3] OFFCORR_X[2] OFFCORR_X[1] OFFCORR_X[0] $17 Invalid Address: “Invalid Register Request” $1C Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved $1D Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved |
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