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1.图中R5用DNI表示，DNI是什么意思？R5与芯片7脚的连线即灰色标注线是短路还是开路？
2.芯片外围电路图有数字地和模拟地，怎么判断接地时用哪种地？
3.TP1-9的作用
数字地跟模拟地是什么意思？这个IC是做什么用的你应该清楚吧？画两个地是表示两个地是绝缘的意思。与数字模拟无关。
