MMA26XXKW FREESCALE [Freescale Semiconductor, Inc], MMA26XXKW Datasheet
MMA26XXKW
Related parts for MMA26XXKW
MMA26XXKW Summary of contents
Page 1
... Freescale Semiconductor Data Sheet: Technical Data DSI Inertial Sensor The MMA26xxKW family, a SafeAssure solution, includes DSI2.5 compatible overdamped X-axis satellite accelerometers. Features • ±25g to ±312.5g Nominal Full-Scale Range • Selectable 180 Hz, 2-pole, 400 Hz, 4-pole, or 800 Hz, 4-pole LPF • DSI2.5 Compatible with full support of Mandatory Commands • ...
Page 2
... Application Diagram C4 Ref Des Type C1 Ceramic C2 Ceramic C3 Ceramic, Tantalum C4 Ceramic C5 Ceramic Device Orientation xxxxxxx xxxxxxx MMA26xxKW 2 TEST2 BUSIN V CC TEST1 TEST3 MMA26xx TEST4 BUSRTN V TEST5 SS TEST6 TEST7 C REG BUSOUT C REGA HCAP C5 V SSA PCM V SS Figure 1. Application Diagram ...
Page 3
... OTP FUSE ARRAY CONTROL STATUS IN OUT DSP IIR SINC Filter Low-Pass Filter – – -------------------------------- - – D – Figure 3. Block Diagram V REG V REGA V REF LOW-VOLTAGE RESET TEST Compensation PCM Encoder MMA26xxKW HCAP C REG C REGA V SSA TEST3 TEST4 TEST5 TEST6 PCM 3 ...
Page 4
... This pin is the power supply return node for the digital circuitry PAD Die Attach Pad This pin is the die attach flag, & should be connected to VSS in the application. Reference Corner Corner Pads The corner pads are internally connected to V Pads MMA26xxKW TEST2 TEST3 ...
Page 5
... DROP V 2000 V ESD V 500 V ESD V 200 V ESD T -40 to +125 °C stg T -40 to +150 °C J 2.5 C/W JC Min Typ Max Units 6 -0 14.0 30 -40 +105 °C -40 +125 °C MMA26xxKW (3) (3) (3) (3) (3) (5) (5) (5) (5) (5) (5) (3) (3) (11) (1,12) (1,12) (3) (3) (1) (3) 5 ...
Page 6
... Capacitance 33 ESR (including interconnect resistance) Output High Voltage (PCM 100 A Load Output Low Voltage (PCM 100 A Load Temperature Monitoring 36 Under-Temperature Monitor Threshold 37 Over-Temperature Monitor Threshold MMA26xxKW K/min, unless otherwise specified. Symbol * INRUSH V REG V REGA 5) V PORHCAP_f V PORHCAP_r ...
Page 7
... LSB/g 2.731 LSB/g 1.638 LSB 460 512 564 LSB 1 1023 LSB 0 LSB -5 — — — +4 LSB +1.2 LSB - MMA26xxKW (1) A (1) (1) (1) A (1) A (1) A (1) A (1) (3) (1) A (1) A (1) (1) (1) (3) (3) (1,14) (1,14) (1,14) (1,14) (1,14) (1,14) (1) (1) (1) (3) (3) (3) (3) (3) (3) (3) (3) ...
Page 8
... Deflection, 10-Bit, Self-Test - Offset, 30 sample ave ±25g Range 80 ±50g Range 81 ±62.5g Range 82 ±125g Range 83 ±187g Range 84 ±312g Range 85 Self-test deflection range Self-test deflection range MMA26xxKW K/min, unless otherwise specified. Symbol g g-cell_Clip60X g g-cell_Clip240X g ADC_Clip60X g ADC_Clip60X g ADC_Clip60X g ADC_Clip120X g ADC_Clip240X g ADC_Clip480X = 25 C) ...
Page 9
... OSC OSC 500 s 64 256 s 2.00 5.00 ms 2.00 5.00 ms 1.00 2.50 ms 1.00 2.50 ms 0.50 1.75 ms 0.50 1. OSC MMA26xxKW (7) (7) (7) (7) (7) (3) (3) (7) (7) (7) (7) (3) (7) (7) (3) (7) (7) (7) (7) (7) (7) (7) (7) (7) (3) (7) (7) (7) (7) (7) (7) (7) (7) 9 ...
Page 10
... Minimum voltage tested 100% at final test. Maximum voltage tested 100 final test. 13.N/A. 14.Sensitivity, and overload capability specifications will be reduced when 800Hz filter is selected. 15.Filter cut-off frequencies are directly dependent upon the internal oscillator frequency. 16.Target values. Actual values to be determined during device characterization. MMA26xxKW K/min, unless otherwise specified. Symbol ...
Page 11
... V V HCAP HYST_HCAP POR V REG V PORVREG_r V PORVREG_f V HYST_VREG POR V REGA V PORVREGA_r V PORVREGA_f V HYST_VREGA POR Sensors Freescale Semiconductor, Inc. UV Figure 5. V Under-Voltage Detection HCAP t Figure 6. V Under-Voltage Detection REG t VREGA_POR Figure 7. V Under-Voltage Detection REGA UV: UNDER-VOLTAGE CONDITION EXISTS UV t HCAP_POR VREG_POR MMA26xxKW 11 ...
Page 12
... V THF V THS BUSIN’ t IFS_master t IFS_slave EOF slave 9mA 1mA I RESPONSE DSP_OUT MMA26xxKW 12 t START_master LOGIC ‘1’ t START_slave t ITR t RSP_R t LAT_DSI t LAT_INTERP Figure 8. DSI Bus Inter-frame Timing LOGIC ‘0’ t ITR t RSP_F Sensors Freescale Semiconductor, Inc. ...
Page 13
... ADDR[2] ADDR[1] ADDR[0] UD01[3] UD01[2] UD01[1] UD01[0] UD02[3] UD02[2] UD02[1] UD02[0] UD03[3] UD03[2] UD03[1] UD03[0] UD04[3] UD04[2] UD04[1] UD04[0] UD05[3] UD05[2] UD05[1] UD05[0] UD06[3] UD06[2] UD06[1] UD06[0] UD07[3] UD07[2] UD07[1] UD07[0] UD08[3] UD08[2] UD08[1] UD08[0] Section 3.2.1 for details MMA26xxKW Type F U/F 13 ...
Page 14
... MMA26xxKW 14 Bit LPF[1] LPF[ LPF[0] Low Pass Filter Selected 0 0 400 Hz, 4-Pole 0 1 Not Enabled 1 0 180 Hz, 2-Pole 1 1 800 Hz, 4-Pole RNG[1] ...
Page 15
... DEVCFG1 Values AT_OTP[1] AT_OTP[ Bnk0 $09 0 CRC_U[2] CRC_U[1] CRC_U[ for more information regarding the Request Bnk1 $06 UD00[1] UD00[0] AT_OTP[1] AT_OTP[ DSI Transmitted Values AT[1] AT[ MMA26xxKW ...
Page 16
... UD03 Bnk2 $0A Bnk2 $0B $0B UD04 $0C UD05 Bnk2 $0C $0D UD06 Bnk2 $0D $0E UD07 Bnk2 $0E $0F UD08 Bnk2 $0F Factory Default MMA26xxKW 16 Section 3.2.2 for details regarding the CRC for the user programma- Bit WA[3:0] LOCK_U UNUSED PCM RESERVED Section 3.5.3.6 Bit ...
Page 17
... Lock Bit Active? Enabled YES YES Included in Factory CRC? Yes Yes Yes No No CRC Verification Lock Bit Active? Enabled YES YES Included in User CRC? Yes Yes Yes Yes Yes Yes Yes Yes No No 4.3. The CRC verification is completed on the MMA26xxKW 17 ...
Page 18
... V Voltage Monitor HCAP The device includes a circuit to monitor the voltage on the HCAP pin. If the voltage falls below the specified threshold in Section 2, the device will be reset within the reset delay time (t MMA26xxKW 18 ). External filter capacitors are required, as shown in REG V BUF VOLTAGE REGULATOR ...
Page 19
... CAPTEST_RATE t CAPTEST_RATE t CAPTEST_TIME Capacitor Present Time Figure 10. V Capacitor Monitor REG t CAPTEST_RATE t CAPTEST_TIME Capacitor Present Time Figure 11. V Capacitor Monitor REGA Section 2.8. and either of the internal regulator REGA , VREG_POR or C capacitor REG REGA Capacitor Open Capacitor Open MMA26xxKW 19 ...
Page 20
... Table 7. Signal Chain Characteristics Sample Time Data Width Description ( SINC Filter 16 C Low Pass Filter 16 D Compensation 16 DSP Sampling E 16 10-Bit Output Scaling F Interpolation 1 MMA26xxKW ------------------------------------------------------ FIRST INTEGRATOR Figure 12. Converter Block Diagram Figure 13 ...
Page 21
... Decimation Sinc Filter The serial data stream produced by the filter with a decimation factor of 16. Sensors Freescale Semiconductor, Inc. converters is decimated and converted to parallel values by a 3rd order 16:1 sinc – – ---------------------------------- - – 16 – Figure 14. Sinc Filter Response MMA26xxKW 21 ...
Page 22
... Hz LPF 800 Hz LPF Note: Low Pass Filter Figures do not include g-cell frequency response. MMA26xxKW – – -------------------------------------------------------------------------------------------- – – Section 3.1.2.1, Table 8. Response parameters for the low-pass filter are specified in ...
Page 23
... Figure 15. Low-Pass Filter Characteristics: f Sensors Freescale Semiconductor, Inc. = 180 Hz, 2-Pole MMA26xxKW 23 ...
Page 24
... Figure 16. Low-Pass Filter Characteristics: f MMA26xxKW 24 = 400 Hz, 4-Pole Freescale Semiconductor, Inc. Sensors ...
Page 25
... Figure 17. Low-Pass Filter Characteristics: f Sensors Freescale Semiconductor, Inc. = 800 Hz, 4-Pole MMA26xxKW 25 ...
Page 26
... PCM pin. The PCM output is intended for test use only. A block diagram of the PCM output is shown in Figure 19. Output Scaling 9 D_x[9:1] Sample updated every 16 S Figure 19. PCM Output Function Block Diagram MMA26xxKW 26 Signal Figure 18. Output Scaling Diagram A CARRY 9 Bit ADDER D 9 ...
Page 27
... No Response DSI Read Acceleration Data Short response = zero. 0 DSI Read Acceleration Data Long response = invalid data. 0 Normal DSI Response 0 No Response 0 No Response DSI Read Acceleration Data Short response = zero. 0 DSI Read Acceleration Data Long response = invalid data. 0 Normal MMA26xxKW 27 ...
Page 28
... DSP. The converter can saturate at levels above those specified in ably under all cases of overrange, although the signal may include residual high frequency components for some time after re- turning to the normal range of operation due to non-linear effects of the sensor. MMA26xxKW 28 g-cell Rolloff ...
Page 29
... Standard/Enhanced L/S Not Implemented Standard/Enhanced L WA[3] Standard/Enhanced L R/W Standard/Enhanced L 0 Standard/Enhanced L/S Standard/Enhanced L/S Not Implemented Not Implemented Section ). As long as the minimum inter-frame sep- IFS Data Bnk[1] Bnk[0] PA[3] PA[2] PA[1] Not Implemented Not Implemented Not Implemented Not Implemented WA[2] WA[1] WA[0] RD[3] RD[2] RD[1] FA[2] FA[1] FA[0] FD[3] FD[2] FD[ RA[3] RA[2] RA[1] Not Implemented Not Implemented MMA26xxKW 4.2.1. D0 PA[0] RD[0] FD[0] RA[0] 29 ...
Page 30
... A[3:0]. Once the device address is assigned, the new address (A[3:0]) is not protected by the User Programmable OTP Array CRC Verification. The User Programmable OTP array CRC is calculated and verified using the OTP programmed values of A[3:0] = ‘0000’. Once initialized, the device will no longer recognize or respond to Initialization commands. Table 14. Initialization Command Response D[15] D[14] D[13] D[12] D[11] PA[3] PA[2] PA[1] PA[0] 0 MMA26xxKW 30 Address D[2] D[1] D[0] A[3] A[2] A[1] PA[2] PA[1] PA[0] A[3] A[2] A[1] ...
Page 31
... Bus test passed ENABLE I Delay t MEASURE V CLOSE BUS SWITCH Sensors Freescale Semiconductor, Inc. Definition N INITIALIZATION COMMAND CURRENT RESP BUSOUT_DISCHARGE BUSOUT N V < SET BF FLAG BUSOUT THH Y DELAY Figure 22. Initialization Sequence Section 4.2.1.10 for fur- WAIT FOR NEXT DSI BUS COMMAND MMA26xxKW 31 ...
Page 32
... NVM Program Enable. This bit indicates whether programming of the user-programmable OTP locations is enabled OTP programming Enabled 0 - OTP programming Disabled A[3:0] DSI device address. This field contains the device address. Shaded bits are transmitted to meet the response message length of the received message MMA26xxKW 32 Address D[2] D[1] D[0] A[3] ...
Page 33
... The device truncates the LSBs for Acceleration Data Responses of length less than 10. If the result of the truncation is 0, the minimum acceleration value is transmitted as defined in Sensors Freescale Semiconductor, Inc. Address D[2] D[1] D[0] A[3] A[2] A[1] A[3] A[2] A[1] Definition Response D[9] D[8] D[7] D[6] AD[9] AD[8] AD[9] AD[8] AD[7] AD[9] AD[8] AD[7] AD[ Response D[9] D[8] D[7] D[6] D[5] S AD[9] AD[8] AD[7] AD[6] AD[5] Definition Section 3.1.4.2) Table 26. Section 4.2.1.11) Section 4.2.1.11) Command A[0] C[3] C[2] C[1] C[0] A[ D[5] D[4] D[3] D[2] D[1] D[0] AD[7] AD[6] AD[5] AD[4] AD[3] AD[2] AD[6] AD[5] AD[4] AD[3] AD[2] AD[1] AD[5] AD[4] AD[3] AD[2] AD[1] AD[0] D[4] D[3] D[2] D[1] D[0] AD[4] AD[3] AD[2] AD[1] AD[0] MMA26xxKW CRC bits CRC bits CRC bits 33 ...
Page 34
... DSI Command #3 DSI Command ‘0011’ is not implemented. The device ignores all command formats with a command ID of ‘0011’. MMA26xxKW 34 10-Bit Data Value Hex Decimal Hex 0x1FF 1023 0x3FF Maximum positive acceleration value Positive acceleration values ...
Page 35
... DSI Command ‘0110’ is not implemented. The device ignores all command formats with a command ID of ‘0110’. Sensors Freescale Semiconductor, Inc. Address D[2] D[1] D[0] A[3] A[2] A[1] A[3] A[2] A[1] Definition Response D[9] D[8] D[7] D[6] D[ Response D[9] D[8] D[7] D[6] D[ V[2] V[1] V[0] Definition Section 4.2.1.11) Section 4.2.1.11) Command A[0] C[3] C[2] C[1] C[0] A[ CRC D[4] D[3] D[2] D[1] D[0] 0 DEVID bits D[4] D[3] D[2] D[1] D[0] 0 DEVID MMA26xxKW CRC bits CRC bits 35 ...
Page 36
... DSI device address. This field contains the device address. This field must match the internal programmed address field or the Global A[3:0] Device Address of ‘0000’. Otherwise, the command is ignored. D[7:0] Used for CRC calculation only 4.2.1.9 DSI Command #8 DSI Command ‘1000’ is not implemented. The device ignores all command formats with a command ID of ‘1000’. MMA26xxKW 36 BSOPEN Address D[1] D[0] A[3] A[2] ...
Page 37
... Data D[10] D[9] D[8] D[7] D[6] D[5] WA[2] WA[1] WA[ Bnk[1] Data D[10] D[9] D[8] D[7] D[6] D[ Definition voltage when programming the OTP array. No internal verification of PP Section 3.2.2). Section 4.2.1.11) Table 39. Command A[0] C[3] C[2] C[1] C[0] A[ D[4] D[3] D[2] D[1] D[0] Bnk[0] RD[3] RD[2] RD[1] RD[0] D[4] D[3] D[2] D[1] D[ A[3] A[2] A[1] A[0] Section 4.2.1.1). If the times the number of bits PROG_BIT MMA26xxKW CRC bits CRC bits CRC bits 37 ...
Page 38
... MMA26xxKW 38 Register 0 UNUSED No Write to NVM executed, Normal Response: RD[3:0] = Device Address ADDR[3: UNUSED No Write to NVM executed, Normal Response: RD[3:0] = Device Address ADDR[3: UNUSED No Write to NVM executed, Normal Response: RD[3:0] = Device Address ADDR[3:0] 1 DEVCFG2[7] ...
Page 39
... The reset values assigned to each DSI Standard Values Definition CRC Polynomial = Seed = ‘1010’ CRC Length = Short Command Length = N N/A MMA26xxKW CRC bits CRC bits ...
Page 40
... Bit Field RD7:0] RD[7:0] contains the data of the register addressed by RA[3:0]. RA[3:0] RA[3:0] contains the byte address of the register to be read. DSI device address. This field contains the device address. This field must match the internal programmed address field. Otherwise, the A[3:0] command is ignored. MMA26xxKW 40 Table Address D[2] D[1] D[0] A[3] ...
Page 41
... Freescale Semiconductor, Inc specified in ST_DEACT_xxx Address D[2] D[1] D[0] A[3] A[2] A[1] A[3] A[2] A[1] Definition Response D[9] D[8] D[7] D[6] D[ Data D[9] D[8] D[7] D[6] D[ Definition Section 3.1.4.2) Section Section 4.2.1.11) Section 4.2.1.11) Section 2. Command A[0] C[3] C[2] C[1] C[0] A[ CRC D[4] D[3] D[2] D[1] D[0] BS AT[1] AT[ bits D[4] D[3] D[2] D[1] D[0] BS AT[1] AT[ Refer to Section 3.3.2 for details. MMA26xxKW CRC bits CRC bits 41 ...
Page 42
... This bit is set if the voltage at HCAP is below the threshold specified in NVM Program Enable. This bit indicates whether programming of the user-programmable OTP locations is enabled OTP programming Enabled 0 - OTP programming Disabled A[3:0] DSI device address. This field contains the device address. MMA26xxKW specified in Section ST_ACT_xxx Address D[2] ...
Page 43
... PORCREGA_r returns above HCAP HCAP_POR returns above HCAP HCAP_POR until VHCAP HCAP_POR , or an internal supply under-voltage condition . BSOPEN returns above V HCAP PORHCAP_r until the POR_CAPTEST . BSOPEN until the BUSIN supply under-voltage condition occurs. THF . BSOPEN returns above V BUSIN THF MMA26xxKW 43 ...
Page 44
... Reference Freescale Case Outline Drawing # 98ASA00090D http://www.freescale.com/files/shared/doc/package_info/98ASA00090D.pdf 5.2 Recommended Footprint Reference Freescale Application Note AN3111, latest revision: http://www.freescale.com/files/sensors/doc/app_note/AN3111.pdf Table 60. Revision History Revision Revision number date 4 03/2012 • Added SafeAssure logo, changed first paragraph and disclaimer to include trademark information. MMA26xxKW 44 Description of changes Freescale Semiconductor, Inc. Sensors ...
Page 45
... RoHS-compliant and/or Pb-free versions of Freescale products have the functionality and electrical characteristics of their non-RoHS-compliant and/or non-Pb-free counterparts. For further information, see http:/www.freescale.com or contact your Freescale sales representative. For information on Freescale’s Environmental Products program http://www.freescale.com/epp. MMA26xxKW Rev. 4 03/2012 Information in this document is provided solely to enable system and software implementers to use Freescale Semiconductor products ...