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2.4 Clear CMOS To clear the CMOS data, close the JP2 (2-3) for about 3 seconds, then open it again. • JP2: Clear CMOS (Reserved Function) JP2 1-2 2-3 DESCRIPTION Normal Operation Clear CMOS Setup WARNING: When you change the power supply between ATX and AT, clear CMOS (Power On) first. Otherwise, the CPU Board may fail to boot. 2.5 Onboard Keyboard/Mouse Power Source Setting JP11 1-2 2-3 DESCRIPTION +5V +5VSB 2.6 COM2 RS232/RS422/RS485 COM2 RS232/RS422/RS485 mode Selection & Voltage Output (PIN11) Setting • JP9: To set the operating mode of COM2. JP9 1-2 2-3 • JP14: To set the operating mode of COM2. JP14 1-2 2-3 • DESCRIPTION RS232 RS422/485 DESCRIPTION RS422 RS485 JP6: To select the function of pin 11 at COM2, you can set this pin to provide RI, 5V or 12V power source. JP6 (1-3) (2-4) (3-5) (2-4) (1-3) (4-6) COM2 PIN8 +5V +12V RI 11
