ARMexpress LITE Pin Diagram
 



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

 
/SOUT 1   Serial Output, RS-232 compatible (active low)
/SIN 2   Serial Input, RS-232 compatible  (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 pull-up) (active low)

IO0
IO1
IO2
IO3
IO4
IO5
IO6
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




PWM3

PWM1, RXD1
PWM2, TXD1
AD0
AD2
AD5
AD1
AD6
AD7
PWM7
PWM5
PWM8


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





EINT2
EINT0

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

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


Dual Use AD pins
 
On reset or power up the AD pins are configured as digital IOs on the ARMexpress LITE.  When the BASIC accesses these pins they are changed to analog inputs. After that they will remain analog inputs until the next reset or power up.
 
PWM pins
 
All pins can be used for the software PWM function, and 6 pins can be used for the hardware driven HWPWM function (HWPWM channels 4 and 6 are not connected).