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CC2541芯片的datasheet中，pin脚1为GND属性。
但在有的参考设计中，pin脚1是NC属性，看原理图发现，芯片为CC2541F256，但是未查到该芯片
不知道哪位大神知道CC2541 pin脚1应该为GND还是NC？
这个问题有客户问过类似的，答案看这边： http://e2e.ti.com/support/wireless_connectivity/f/538/t/306127.aspx
