Chipcon AS
SmartRF
®
CC2420DBK Demonstration Board Kit User Manual
(rev. 1.3) 2004-11-03 Page 13/ 52
AVR I/O pins
AVR Pin
Number
AVR pin name
Pin usage
I/O connector
32
PD7 (T2)
UART 1, RS232, CTS
P3 pin 17
33
PG0 (|WR)
WR_N, Write RAM
N/A
34
PG1 (|RD)
RD_N, Read RAM
N/A
35
PC0 (A8)
RAM address
N/A
36
PC1 (A9)
RAM address
N/A
37
PC2 (A10)
RAM address
N/A
38
PC3 (A11)
RAM address
N/A
39
PC4 (A12)
RAM address
N/A
40
PC5 (A13)
RAM address
N/A
41
PC6 (A14)
RAM address
N/A
42
PC7 (A15)
Select RAM, (upper / lower 32K) N/A
43
PG2 (ALE)
Latch enable
N/A
44
PA7 (AD7)
RAM a Data
N/A
45
PA6 (AD6)
RAM a Data
N/A
46
PA5 (AD5)
RAM a Data
N/A
47
PA4 (AD4)
RAM a Data
N/A
48
PA3 (AD3)
RAM a Data
N/A
49
PA2 (AD2)
RAM a Data
N/A
50
PA1 (AD1)
RAM a Data
N/A
51
PA0 (AD0)
RAM a Data
N/A
52 VCC
Supply
power
N/A
53 GND
Ground
N/A
54
PF7 (ADC7/TDI)
JTAG interface
P10 pin 9
55
PF6 (ADC6/TDO)
JTAG interface
P10 pin 3
56
PF5 (ADC5/TMS)
JTAG interface
P10 pin 5
57
PF4 (ADC4/TCK)
JTAG interface
P10 pin 1
58
PF3 (ADC3)
Temperature sensor (ADC)
P4 pin 9
59
PF2 (ADC2)
Joystick down
P4 pin 7
60
PF1 (ADC1)
Joystick left
P4 pin 5
61
PF0 (ADC0)
Potentiometer (ADC)
P4 pin 11
62
AREF
Reference voltage for ADC
P4 pin 2
63 GND
Ground
N/A
64
AVCC
ADC voltage ref
N/A
Table 3: AVR I/O pins
