ARMexpress Pin Diagram
 



The ARMexpress is pin compatible with the Parallax BASIC Stamp. BASIC Stamp is a registered trademark of Parallax Inc.

/SOUT 1   Serial Output, RS-232 compatable (active low)
/SIN 2 Serial Input, RS-232 compatable  (active low)
ATN 3 connect to DTR with RS-232, when HIGH reset the Node (active high)
/RES 22   TTL level  RESET (open collector with 2.7K pullup) (active low)

IO0
IO1
IO2
IO3
IO4
IO51
IO61
IO7
IO8
IO9
IO10
IO11
IO12
IO13
IO14
IO15

5
6
7
8
9
10 
11 
12
13
14
15
16
17
18
19
20






note 1
note 1







EINT2
EINT0

 

 

Input/Outputs  -- user controlled

0-3.3V level

4mA drive when configured as Outputs

5V tolerant  - use limiting resistor when connecting to a 5V supply

GND 4,23   Ground (0V)
VDD 24   Power 5-12V input power
Alt-VDD
 21

Alternate 5V input power (for Parallax compatability)
DO NOT exceed 5V on this pin
connection to pin 24 is preferred
this pin is pulled low during download of a C program


1These pins (IO5 an IO6) are open-drain, when configured as outputs can only pull down.