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ASM330LHB 数据表(PDF) 31 Page - STMicroelectronics |
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ASM330LHB 数据表(HTML) 31 Page - STMicroelectronics |
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31 / 131 page  6.4.2 Block diagrams of the accelerometer filters In the ASM330LHB, the filtering chain for the accelerometer part is composed of the following: • Digital filter (LPF1) • Composite filter Details of the block diagram appear in the following figure. Figure 19. Accelerometer chain ADC Digital LP Filter ODR_XL[3:0] Composite Filter LPF1 Figure 20. Accelerometer composite filter SLOPE FILTER HPCF_XL[2:0] 000 001 010 … 111 SPI/I2C/ 1 0 HP_SLOPE_XL_EN LPF2_XL_EN 0 1 Digital HP Filter HPCF_XL[2:0] Digital LP Filter LPF2 HPCF_XL[2:0] 6D/4D 0 1 LOW_PASS_ON_6D 1 0 SLOPE_FDS Wake-up Activity / Inactivity Free-fall FIFO USER OFFSET 0 1 USR_OFF_ON_OUT USR_OFF_W OFS_USR[7:0] 1 0 USR_OFF_ON_WU LPF1 output(1) FSM/MLC MIPI I3CSM 1. The cutoff value of the LPF1 output is ODR/2 when the accelerometer is in high-performance mode and ODR up to 833 Hz. This value is equal to 780 Hz when the accelerometer is in low-power mode. ASM330LHB Block diagram of filters DS13773 - Rev 7 page 31/131 |
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