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MMA8451Q Datasheet(PDF) 21 Page - Freescale Semiconductor, Inc |
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MMA8451Q Datasheet(HTML) 21 Page - Freescale Semiconductor, Inc |
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21 / 53 page  Sensors Freescale Semiconductor 21 MMA8451Q 6 Register Descriptions Table 11. Register Address Map Name Type Register Address Auto-Increment Address Default Hex Value Comment FMODE = 0 F_READ = 0 FMODE > 0 F_READ = 0 FMODE = 0 F_READ = 1 FMODE > 0 F_READ = 1 STATUS/F_STATUS(1)(2) R 0x00 0x01 00000000 0x00 FMODE = 0, real time status FMODE > 0, FIFO status OUT_X_MSB(1)(2) R 0x01 0x02 0x01 0x03 0x01 Output — [7:0] are 8 MSBs of 14-bit sample. Root pointer to XYZ FIFO data. OUT_X_LSB(1)(2) R 0x02 0x03 0x00 Output — [7:2] are 6 LSBs of 14-bit real-time sample OUT_Y_MSB(1)(2) R 0x03 0x04 0x05 0x00 Output — [7:0] are 8 MSBs of 14-bit real-time sample OUT_Y_LSB(1)(2) R 0x04 0x05 0x00 Output — [7:2] are 6 LSBs of 14-bit real-time sample OUT_Z_MSB(1)(2) R 0x05 0x06 0x00 Output — [7:0] are 8 MSBs of 14-bit real-time sample OUT_Z_LSB(1)(2) R 0x06 0x00 Output — [7:2] are 6 LSBs of 14-bit real-time sample Reserved R 0x07 ———— — — Reserved. Read return 0x00. Reserved R 0x08 ———— — — Reserved. Read return 0x00. F_SETUP(1)(3) R/W 0x09 0x0A 00000000 0x00 FIFO set-up TRIG_CFG(1)(4) R/W 0x0A 0x0B 00000000 0x00 Map of FIFO data capture events SYSMOD(1)(2) R 0x0B 0x0C 00000000 0x00 Current System Mode INT_SOURCE(1)(2) R 0x0C 0x0D 00000000 0x00 Interrupt status WHO_AM_I(1) R 0x0D 0x0E 00011010 0x1A Device ID (0x1A) XYZ_DATA_CFG(1)(4) R/W 0x0E 0x0F 00000000 0x00 Dynamic Range Settings HP_FILTER_CUTOFF(1)(4) R/W 0x0F 0x10 00000000 0x00 Cut-off frequency is set to 16 Hz @ 800 Hz PL_STATUS(1)(2) R 0x10 0x11 00000000 0x00 Landscape/Portrait orientation status PL_CFG(1)(4) R/W 0x11 0x12 10000000 0x80 Landscape/Portrait configuration. PL_COUNT(1)(3) R/W 0x12 0x13 00000000 0x00 Landscape/Portrait debounce counter PL_BF_ZCOMP(1)(4) R/W 0x13 0x14 01000100 0x44 Back/Front, Z-Lock Trip threshold P_L_THS_REG(1)(4) R/W 0x14 0x15 10000100 0x84 Portrait to Landscape Trip Angle is 29° FF_MT_CFG(1)(4) R/W 0x15 0x16 00000000 0x00 Freefall/Motion functional block configuration FF_MT_SRC(1)(2) R 0x16 0x17 00000000 0x00 Freefall/Motion event source register FF_MT_THS(1)(3) R/W 0x17 0x18 00000000 0x00 Freefall/Motion threshold register FF_MT_COUNT(1)(3) R/W 0x18 0x19 00000000 0x00 Freefall/Motion debounce counter Reserved R 0x19 ———— — — Reserved. Read return 0x00. Reserved R 0x1A ———— — — Reserved. Read return 0x00. Reserved R 0x1B ———— — — Reserved. Read return 0x00. Reserved R 0x1C ———— — — Reserved. Read return 0x00. TRANSIENT_CFG(1)(4) R/W 0x1D 0x1E 00000000 0x00 Transient functional block configuration TRANSIENT_SRC(1)(2) R 0x1E 0x1F 00000000 0x00 Transient event status register |
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