User manual

APC-3X97A user manual
18
2.2 Onboard Jumpers and Port Pinouts
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 <DEL> 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
Name
Pin#
Pin#
Signal
Name
DCD
1
2
RXD
TXD
3
4
DTR
Ground
5
6
DSR
RTS
7
8
CTS
RI
9
10
NC