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LIS2DUXS12 数据表(PDF) 16 Page - STMicroelectronics |
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LIS2DUXS12 数据表(HTML) 16 Page - STMicroelectronics |
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16 / 104 page  4 Application hints Figure 6. LIS2DUXS12 electrical connections (top view) SDA/SDI/SDO SCL/SPC 10µF 100nF GND SDO/SA0 LIS2DUXS12 HOST I2C / SPI (3/4-w) SCL SDA Vdd_IO Rpu Rpu Pull-up to be added Rpu=10kOhm I2C configuration 1 2 11 10 12 5 6 7 3 4 9 8 Vdd_IO Vdd_IO 100nF GND Vdd Vdd RES GND CS MIPI I3C / ® The device core is supplied through the Vdd line while the I/O pins are supplied through the Vdd_IO line. Power supply decoupling capacitors (100 nF ceramic, 10 µF aluminum) should be placed as near as possible to pin 9 of the device (common design practice). All the voltage and ground supplies must be present at the same time to have proper behavior of the IC (refer to Figure 6). It is possible to remove Vdd while maintaining Vdd_IO without blocking the communication bus, in this condition the measurement chain is powered off. The functionality of the device and the measured acceleration data are selectable and accessible through the I²C/MIPI I3C® or SPI interfaces. When using the I²C, CS must be tied high (that is, connected to Vdd_IO). The functions, the threshold and the timing of the two interrupt pins (INT1 and INT2) can be completely programmed by the user through the I²C/MIPI I3C®/SPI interface. LIS2DUXS12 electrical connections for Qvar Qvar has a dedicated channel that can be activated by setting the AH_QVAR_EN bit to 1 in the AH_QVAR_CFG (31h) register The Qvar external electrode connections are illustrated in the following figure. Figure 7. Qvar external connections to pin 11, 12 (Qvar input) LIS2DUXS12 INT1 INT2 500 Ω 500 Ω 110 pF 110 pF Electrode 1 Electrode 2 D1 (1) D2 (1) (1) ST ESDALCL5-1BM2 is referenced as an ST catalog product but similar features of other ESD diodes also can be used. Note: Figure 7 provides an example of a test circuit. For a specific application, refer to the related application note. LIS2DUXS12 Application hints DS14035 - Rev 2 page 16/104 |
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