AXIOMTEK Mano831 Series, User Manual

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MANO831 Mini ITX Board
8 Board and Pin Assignments
2.2.1 Clear CMOS (JCMOS1)
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can
clear the CMOS memory of date, time, and system setup parameters by erasing the
CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS,
which includes system setup information such as system passwords.
To erase the RTC RAM:
1.
Turn OFF the computer and unplug the power cord.
2. Remove the onboard battery.
3. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3
for about 5~10 seconds, then move the cap back to pins 1-2.
4. Re-install the battery.
5. Plug the power cord and turn ON the computer.
6. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter
data.
Caution
Except when clearing the RTC RAM, never remove the cap on this jumper
default position. Removing the cap will cause system boot failure!
2.2.2 COM3 RS-232/422/485 Mode Setting (JP1, JP2, JP3)
This jumper allows you to select the operation mode of COM port 3.
Function Setting
Normal operation (Default) 1-2 close
Clear CMOS 2-3 close
Function Setting
RS-232 mode
(Default)
JP1 1-3, 2-4 close
JP2 1-3, 2-4 close
JP3 1-2 close
RS-422 mode
JP1 3-5, 4-6 close
JP2 3-5, 4-6 close
JP3 3-4 close
RS-485 mode
JP1 3-5, 4-6 close
JP2 3-5, 4-6 close
JP3 5-6 close