MMA8451QR1 Freescale, MMA8451QR1 Datasheet - Page 4

• Manufacturer Part Number: MMA8451QR1
• Manufacturer: Freescale

Specifications of MMA8451QR1

• Lead Free Status / RoHS Status: Compliant

4
MMA8451Q
6.4
6.5
6.6
Mode 1: Freefall Detection with ELE = 0, OAE = 0 ...................................................................................................... 32
Mode 2: Freefall Detection with ELE = 1, OAE = 0 ...................................................................................................... 32
Mode 3: Motion Detection with ELE = 0, OAE = 1 ....................................................................................................... 32
Mode 4: Motion Detection with ELE = 1, OAE = 1 ....................................................................................................... 32
0x15 FF_MT_CFG Freefall/Motion Configuration Register ........................................................................................ 33
0x16 FF_MT_SRC Freefall/Motion Source Register ................................................................................................... 33
0x17: FF_MT_THS Freefall and Motion Threshold Register ....................................................................................... 34
0x18 FF_MT_COUNT Debounce Register ................................................................................................................. 35
0x1D: Transient_CFG Register ................................................................................................................................... 37
0x1E TRANSIENT_SRC Register ............................................................................................................................... 37
0x1F TRANSIENT_THS Register ................................................................................................................................ 38
0x20 TRANSIENT_COUNT ......................................................................................................................................... 38
0x21: PULSE_CFG Pulse Configuration Register ....................................................................................................... 39
0x22: PULSE_SRC Pulse Source Register ................................................................................................................. 39
0x23 - 0x25: PULSE_THSX, Y, Z Pulse Threshold for X, Y & Z Registers ................................................................. 40
0x26: PULSE_TMLT Pulse Time Window 1 Register .................................................................................................. 40
0x27: PULSE_LTCY Pulse Latency Timer Register .................................................................................................... 41
0x28 PULSE_WIND Register (Read/Write) ................................................................................................................. 42
Motion and Freefall Embedded Function Registers .................................................................................................. 32
Table 33. FF_MT_CFG Description ......................................................................................................................... 33
Figure 13. FF_MT_CFG High and Low g Level ........................................................................................................ 33
Table 34. Freefall/Motion Source Description .......................................................................................................... 34
Table 35. FF_MT_THS Description .......................................................................................................................... 34
Table 36. FF_MT_COUNT Description ..................................................................................................................... 35
Table 37. FF_MT_COUNT Relationship with the ODR ............................................................................................ 35
Figure 14. DBCNTM Bit Function ............................................................................................................................. 36
Transient (HPF) Acceleration Detection ................................................................................................................... 37
Table 38. TRANSIENT_ CFG Description ................................................................................................................ 37
Table 39. TRANSIENT_SRC Description ................................................................................................................. 37
Table 40. TRANSIENT_THS Description ................................................................................................................. 38
Table 41. TRANSIENT_COUNT Description ............................................................................................................ 38
Table 42. TRANSIENT_COUNT Relationship with the ODR .................................................................................... 38
Single, Double and Directional Tap Detection Registers .......................................................................................... 39
Table 43. PULSE_CFG Description .......................................................................................................................... 39
Table 44. PULSE_SRC Description .......................................................................................................................... 39
Table 45. PULSE_THSX Description ........................................................................................................................ 40
Table 46. PULSE_THSY Description ........................................................................................................................ 40
Table 47. PULSE_THSZ Description ........................................................................................................................ 40
Table 48. PULSE_TMLT Description ........................................................................................................................ 40
Table 49. Time Step for PULSE Time Limit (Reg 0x0F) Pulse_ LPF_EN = 1 .......................................................... 40
Table 50. Time Step for PULSE Time Limit (Reg 0x0F) Pulse_LPF_EN = 0 ........................................................... 41
Table 51. PULSE_LTCY Description ........................................................................................................................ 41
Table 52. Time Step for PULSE Latency @ ODR and Power Mode (Reg 0x0F) Pulse_ LPF_EN = 1 .................... 41
Table 53. Time Step for PULSE Latency @ ODR and Power Mode (Reg 0x0F) Pulse_ LPF_EN = 0 .................... 41
Table 54. PULSE_WIND Description ........................................................................................................................ 42
Table 55. Time Step for PULSE Detection Window @ ODR and Power Mode (Reg 0x0F) Pulse_ LPF_EN = 1 .... 42
Table 56. Time Step for PULSE Detection Window @ ODR and Power Mode (Reg 0x0F) Pulse_ LPF_EN = 0 ..... 42
0x22 PULSE_SRC Register (Read Only) ........................................................................................................... 39
0x23 PULSE_THSX Register (Read/Write) ........................................................................................................ 40
0x24 PULSE_THSY Register (Read/Write) ........................................................................................................ 40
0x25 PULSE_THSZ Register (Read/Write) ........................................................................................................ 40
0x26 PULSE_TMLT Register (Read/Write) ........................................................................................................ 40
0x27 PULSE_LTCY Register (Read/Write) ......................................................................................................... 41
0x15 FF_MT_CFG Register (Read/Write) .......................................................................................................... 33
0x16: FF_MT_SRC Freefall and Motion Source Register (Read Only) .............................................................. 33
0x17 FF_MT_THS Register (Read/Write) ........................................................................................................... 34
0x18 FF_MT_COUNT_Register (Read/Write) .................................................................................................... 35
0x1D TRANSIENT_ CFG Register (Read/Write) ................................................................................................ 37
0x1E TRANSIENT_SRC Register (Read Only) .................................................................................................. 37
0x1F TRANSIENT_THS Register (Read/Write) .................................................................................................. 38
0x20 TRANSIENT_COUNT Register (Read/Write) ............................................................................................ 38
0x21 PULSE_CFG Register (Read/Write) .......................................................................................................... 39
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