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IS1871SF 数据表(PDF) 33 Page - Microchip Technology |
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IS1871SF 数据表(HTML) 33 Page - Microchip Technology |
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33 / 44 page ![]() APPENDIX A: REFERENCE CIRCUIT Figure A-1 and Figure A-3 illustrate a typical application circuit of the IS1870 and IS1871. The application circuit lists the RF matching circuit, PMU power tree, LED option, test points, and configuration table. The GPIOs can be configured to general I/O functions or the function of ADC, PTS, PWM, and external 32.768 KHz crystal. FIGURE A-1: IS1870 APPLICATION CIRCUIT Note 1: The C13, C14, L4, C12, C11, C10, C3, and C4 should be as close to the chip as possible. 2: The value of the antenna matching component depends on the user’s antenna and PCB layout. |
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