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LSM303C 数据表(PDF) 22 Page - STMicroelectronics |
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LSM303C 数据表(HTML) 22 Page - STMicroelectronics |
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22 / 53 page ![]() Application hints LSM303C 22/53 DocID024975 Rev 2 5 Application hints Figure 8. LSM303C electrical connections The device core is supplied through the Vdd line while the I/O pads 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 8). It is possible to remove Vdd, 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 or SPI interfaces. When using the I2C, CS must be tied high (i.e. connected to Vdd_IO). The functions, the threshold and the timing of the two interrupt pins (INT_XL and INT_MAG) can be completely programmed by the user through the I2C/SPI interface. 5.1 Soldering information The LGA package is compliant with the ECOPACK®, RoHS and “Green” standards. It is qualified for soldering heat resistance according to JEDEC J-STD-020. Leave “Pin 1 Indicator” unconnected during soldering. Land pattern and soldering recommendations are available at www.st.com. Digital signal from/to signal controller. Signal levels are defined by proper selection of Vdd_IO. Vdd_IO C2=10µF Vdd C3=100nF GND SCL/SPC SDA/SDI/SDO CS_XL CS_MAG GND Vdd_IO 4 1 6 5 INT_MAG 12 11 7 10 Vdd C4=100nF C1=100nF TOP VIEW Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. Downloaded from Arrow.com. |
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