Asus Pro A520M-C II/CSM Pro A520M-C II Users Manual English - Page 12

11. Clear CMOS header This header allows you to clear the CMOS RTC RAM data of the system setup information such as date, time, and system passwords. To erase the RTC RAM: +3V_BAT GND CLRTC PIN 1 1. Turn OFF the computer and unplug the power cord. 2. Use a metal object such as a screwdriver to short the two pins. 3. Plug the power cord and turn ON the computer. 4. Hold down the key during the boot process and enter BIOS Setup to reenter data. If the steps above do not help, remove the onboard battery and short the two pins again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery. RXD DTR DSR CTS 12. COM Port header This header is for a serial (COM) port. Connect the serial port module cable to this header, then install the module to a slot opening at the back of the system chassis. COM PIN 1 DCD TXD GND RTS RI AGND NC SENSE1_RETUR SENSE2_RETUR 13. Front panel audio header This header is for a chassis-mounted front panel audio I/O module that supports HD audio standard. Connect one end of the front panel audio I/O module cable to this header. PORT1 L PORT1 R PORT2 R SENSE_SEND PORT2 L • We recommend that you connect a high-definition front panel audio module to this header to avail of the motherboard's highdefinition audio capability. AAFP • If you want to connect a high-definition front panel audio module to this header, set the Front Panel Type item in the BIOS Setup to [HD Audio]. By default, this header is set to [HD Audio]. HD-audio-compliant pin definition 14. LPC Debug header This header allows connection to a LPC Debug card. • Scan the QR code to view the meaning of each debugging code. • Debugging codes are only available for ASUS LPC Debug cards. • Contact your region sales representative for LPC Debug cards ordering. +3V +3V CK_24M_LPC GND LPC_DEBUG PIN 1 S_LAD0 S_LAD1 S_LAD2 S_LAD3 S_LFRAME# 1-4 Chapter 1: Product Introduction