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FXLS8971CF 数据表(PDF) 80 Page - NXP Semiconductors |
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FXLS8971CF 数据表(HTML) 80 Page - NXP Semiconductors |
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80 / 100 page  NXP Semiconductors FXLS8971CF 3-Axis Low-g Accelerometer • Resistors R1 and R2 are not needed if the interrupt output driver type is configured for push-pull operation (default). In order to avoid their residual current consumption in default state (no interrupt asserted), NXP recommends connecting them either to GND or VDD according to INT_POL choice (1 or 0 respectively). • If either the INT1 or INT2 pins are not used in the application, leave them unconnected. • The required pull-up resistor values for R3 and R4 are dependent on several factors including the I2C clock frequency, bus pull-up voltage, and the total parasitic trace + device capacitances. A suggested starting point is 4.7 kΩ for Standard and Fast modes. • The external trigger function can be used to initiate a single shot measurement of the XYZ acceleration and temperature data. This mode is useful for synchronizing measurements with an external system or for creating user-specific ODRs. The measurement is triggered on the rising edge of the EXT_TRIG signal. aaa-053941 C2 1.0 µF C1 0.1 µF R1 R2 1 2 3 4 5 10 11 12 9 8 7 6 VDD VDD BT_MODE GND n.c. n.c. GND INTF_SEL INT1/MOT_DET SPI_CS_B/WAKE_UP INT2/EXT_TRIG/BOOT_OUT INT1 WAKE_UP INT2/EXT_TRIG SA0/SPI_MISO MISO MOSI SCLK SDA/SPI_MOSI/SPI_DATA SCL/SCLK Figure 23. Typical Application Circuit #2 – SPI 4-wire mode aaa-053942 C2 1.0 µF C1 0.1 µF R1 R2 1 2 3 4 5 10 11 12 9 8 7 6 VDD VDD BT_MODE GND n.c. n.c. GND INTF_SEL INT1/MOT_DET SPI_CS_B/WAKE_UP INT2/EXT_TRIG/BOOT_OUT INT1 SPI_CS_B/WAKE_UP INT2/EXT_TRIG DNC SPI_DATA SCLK SDA/SPI_MOSI/SPI_DATA SCL/SCLK Figure 24. Typical Application Circuit #3 – SPI 3-wire mode (software enabled; SENS_CONFIG1[SPI_M] = 1) aaa-053943 C2 1.0 µF C1 0.1 µF R1 R2 1 2 3 4 5 10 11 12 9 8 7 6 VDD VDD BT_MODE GND n.c. n.c. GND INTF_SEL INT1/MOT_DET SPI_CS_B/WAKE_UP INT2/EXT_TRIG/BOOT_OUT INT1 SPI_CS_B/WAKE_UP INT2/EXT_TRIG SA0/SPI_MISO SPI_DATA SCLK SDA/SPI_MOSI/SPI_DATA SCL/SCLK Figure 25. Typical Application Circuit #4 – SPI 3-wire mode (hardwired; SENS_CONFIG1[SPI_M] = X) Notes: FXLS8971CF All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved. Product data sheet Rev. 2.1 — 7 March 2024 80 / 100 |
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