zigbee cc2530 灌电流 拉电流 上拉电阻

http://www.360doc.com/content/10/1227/22/2285160_81873690.shtml
http://bbs.feibit.com/thread-3374-1-1.html
cc2530 引脚不管使用拉电流还是管电流都能驱动led