text: LED red      P1.0
  LED yellow   P1.1
  
  
  Serial port  UCA1
  
  
  CC2420 SPI   UCB0
  
  CC2420 CSN   P3.0 (UBE0STE)
  CC2420 MOSI  P3.1 (UCB0SIMO/SDA)
  CC2420 MISO  P3.2 (UCB0SOMI/SCL)
  CC2420 SCK   P3.3 (UCB0CLK/STE)
  
  CC2420 FIFOP P1.6
  CC2420 FIFO  P1.5
  CC2420 CCA   P1.7
  CC2420 SFD   P1.3
  CC2420 VREN  P1.4
  CC2420 RESET P1.2
  
  
  Button 1     P2.6
  