Chipcon AS
SmartRF
®
CC2420DBK Demonstration Board Kit User Manual
(rev. 1.3) 2004-11-03 Page 15/ 52
P4 pinout
Pin
number
Signal name in
schematic
Pin usage
CC2420 pin
AVR pin
1 N.C.
N/A
N/A
N/A
2
AREF
Voltage reference for A/D
Converter.
N/A 62
3 RESET
Reset
N/A
20
4
SCLK
CC2420 SPI clock, AVR
ISP
32 (SCLK)
11
5 PF1
Joystick
left
N/A
60
6
SO
CC2420 SPI out
34 (SO)
13
7 PF2
Joystick
N/A
59
8
SI
CC2420 SPI in
33 (SI)
12
9 PF3
Temperature
sensor N/A
58
10
VREG_EN
CC2420 voltage regulator
enable
41 (VREG_EN)
15
11 PF0
Potentiometer
N/A
61
12
FIFO
CC2420 FIFO
30 (FIFO)
26
13
CSn
CC2420 SPI chip select
31 (CSn)
10
14
FIFOP
CC2420 FIFOP
29 (FIFOP)
25
15
3.3V
3.3V Regulated supply
N/A
N/A
16
RESETn
CC2420 Reset
21 (RESETn)
16
17 N.C.
N/A
N/A
N/A
18
CCA
CC2420 Clear Channel
Assessment
28 (CCA)
31
19
SFD
CC2420 Start of Frame
Delimiter
27 (SFD)
29
20 GND
Ground
N/A
N/A
Table 5: P4 pinout
