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CC3200 4层板布线时,接地方式采用单点还是多点?每层都需要铺铜吗?

Other Parts Discussed in Thread: CC3200, ADS1299

请问使用CC3200的MCU和WIFI功能,在4层板设计时:

1)推荐单点接地还是多点接地?

2)4层都推荐铺铜吗?

3)和含有AD的器件(ads1299)一起使用需要将模拟地、数字地分离吗?

4)针对CC3200有比较好的射频干扰屏蔽小技巧吗?