EPX-C414/Configuration
v1.0
www.winsystems.com
Page 21
7.8.2 Standard
Standard requires changing the default I/O ranges within the BIOS.
The watchdog can be enabled or disabled via software by writing an appropriate timeout
value to I/O port 29EH. See the table below.
7.9 Real-time Clock/Calendar
A real-time clock is used as the AT-compatible clock/calendar. It supports a number of
features including periodic and alarm interrupt capabilities. In addition to the time and
date-keeping functions, the system configuration is kept in CMOS RAM contained
within the clock section. A battery must be enabled for the real-time clock to retain time
and date during a power down.
7.10 Connectors
7.10.1 PWR Power and Reset
Power is applied to the EPX-C414 via the connector at PWR. DC 5V is the main supply
to the board. The +12V and -12V DC are not required for the basic SBC operation, this
supplies the PC104, PC/104-Plus, and backlight connectors.
A jumper is provided to short 5V and 5V Stand_by. This is used when an AT power
supply is connected to the system and pin 6 of PWR connector is open (not connected
to +5V).
WinSystems offers the cable CBL-265-G-2-1.5 to simplify this connection.
Table 20:
Timeout Values
Port Address
Value
Reset Interval
29EH
00h
DISABLED
01h
3 SECONDS
03h
30 SECONDS
05h
300 SECONDS
29FH
ANY
RESET TIMER
