Avalue EAX-Q77 - Manual (Page 21)

EAX-Q77 User’s Manual
EAX-Q77 User’s Manual 21
2.5 Jumper and Connector List
2.5.1 Jumper List
You can configure your board to match the needs of your application by setting jumpers. A
jumper is the simplest kind of electric switch.
It consists of two metal pins and a small metal clip (often protected by a plastic cover) that
slides over the pins to connect them. To “close” a jumper, connect the pins with the clip. To
“open” a jumper, remove the clip. Sometimes a jumper has three pins, labeled 1, 2, and 3. In
this case, connect either two pins.
The jumper settings are schematically depicted in this manual as follows:
A pair of needle-nose pliers may be helpful when working with jumpers.
Connectors on the board are linked to external devices such as hard disk drives, a keyboard,
or floppy drives. In addition, the board has a number of jumpers that allow you to configure
your system to suit your application.
If you have any doubts about the best hardware configuration for your application, contact
your local distributor or sales representative before you make any changes.
The following table lists the jumpers on your board.
Label Function
CLR_CMOS Clear CMOS
JRS1 Serial port1, RS232 / RS422 / RS485 function select
JRS2 Serial port1, RS232 / RS422 / RS485 signal select
JRS3 Serial port1, RS232 / RS422 signal select
JCOM2 Power Select Jumper, +5V / +12V power select
AT_CN Power Mode Select Jumper, AT / ATX power mode select
ME_DIS ME Update Firmware Jumper
GP15_CPT GPIO_CN