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https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/805859/dac8775-unused-hart-pins
如果我不使用 HART、是否需要通过电容器将 HARTIN_X 引脚耦合到 GND？ 它们可以直接连接到 GND 还是保持悬空？
