Eurotech Appliances VIPER / VIPER-LITE PXA255 - Manual (Page 59)

VIPER Technical Manual Detailed hardware description
© 2007 Eurotech Ltd Issue E 59
The general-purpose inputs are 5V tolerant, and the outputs can sink and source up to
24mA @ 3.3V.
OUT0B is an inverted OUT0 signal, and is driven to 3.3V, which provides compatibility
with the VIPER-UPS.
The following general purpose IO lines are used by the VIPER-UPS:
Function IO
External Power Fail IN0
Battery Low IN1
UPS Power down OUT0B
VIPER-I/O
The VIPER-I/O is a low cost add-on I/O module for the PXA255 board VIPER. The
board provides a variety of I/O features without the additional costs of a full PC/104
interface. Please refer to the VIPER-I/O Technical Manual on the Development Kit CD.