ETX-945 User Manual 1.02
www.diamondsystems.com
Page 19
4.1.4
Miscellaneous functions
These pins carry power and ground signals and an interrupt request as indicated.
Signal Name
Signal Function
Direction
VCC
+5V ±5% DC power input
In
GND
Power ground
n/a
3V
+3.3V ± 5% supply generated on the ETX module, for
powering external devices (500mA max. external load)
Out
RESERVED
Do not connect
n/a
SERIRQ
Serial interrupt request
In
Caution: Do not connect the 3V pins (pins 12 and 16) of EXT1 to an external power source!