Aplex Technology AHM-6057A - Manual (Page 25)

AHM-6XX7A User Manual 25
2.3 Onboard Jumpers and Port Pin outs
1. JVCCIO
(2.0MM 1X3) PCI-104 port voltage selection jumper: select voltage for
PCI-104+ device
JVCCIO PCI-104 VCCIO
Voltage
CLOSE
1-2
+3.3V (default)
CLOSE
2-3
+5V
2. JCLR_CMOS
(2.0MM 1X3) CMOS clear jumper: CMOS clear operation will permanently
reset old BIOS settings to factory defaults.
JCLR_CMOS CMOS
CLOSE 1-2 NORMAL
(default)
CLOSE 2-3 CLEAR CMOS
Procedures of CMOS clear:
1. Turn off the system and unplug the power cord from the power outlet;
2. To clear the CMOS settings, use the jumper cap to close pins 2 and 3 for about 3 seconds then
reinstall the jumper clip back to pins 1 and 2.
3. Power on the system again;
4. When entering the POST screen, press the key to enter CMOS Setup Utility to load optimal
defaults;
5. After the above operations, save changes and exit BIOS Setup.
3. BAT
(1.25.0MM 1X2) Ext. Battery port: a 3.3V battery is embedded to provide power for
CMOS.
PIN#
Signal
Name
PIN1 VBAT
PIN2 Ground
4.COM2-COM6
(2.0MM 2X5 ) COM2~COM6 port: up to 5 standard RS232 ports are
provided. They can be used directly via COM adapter cable connection.
Signal Pin# Pin# Signal