Gigabyte B550M S2H User Manual - Page 18

_ USB 0_ B B_ F_USB3 F_USB30 3 15) COM (Serial Port Header) The COM header can provide one serial port via an optional COM port cable. For purchasing the optional COM port cable, please contact the local dealer. Pin No. Definition Pin No. Definition 1 NDCD- 6 NDSR- 9 1 10 2 2 NSIN 3 NSOUT 7 NRTS8 NCTS- 4 NDTR- 9 NRI- 5 GND 10 No Pin B S S_F _ S F_ B_ 16) TPM (Trusted Platform Module Header) You may connect a TPM (Trusted Platform Module) to this header. Pin No. Definition Pin No. Definition 2 12 1 LAD0 7 LAD3 1 11 2 VCC3 8 GND 3 LAD1 9 LFRAME 4 No Pin 10 NC 5 LAD2 11 SERIRQ _ _ _B 6 LCLK 12 LRESET S_ S _S _ SF _ B SS S U __ 3 _S S_ _ B _U _ B F_USB3 F 17) CLR_CMOS (Clear CMOS Jumper) Use this jumper to clear the BIOS configuration and reset the CMOS values to factory defaults. To clear the CMOS values, use a metal object like a screwdriver to touch the two pins for a few seconds. Open: Normal Short: Clear CMOS Values •• Always turn off your computer before clearing the CMOS values. •• After system restart, go to BIOS Setup to load factory defaults (select Load Optimized Defaults) or manually configure the BIOS settings (refer to Chapter 2, "BIOS Setup," for BIOS configurations). - 18 - 1 23 1 23 3 1 23 1 _S S 1 23 S _ B S B_ B