Acer Veriton M490G Acer Veriton M490, M490G, and M498G Service Guide - Page 70

F_AUDIO: Front Panel Audio header for Azalia This header allows the user to install auxiliary front-oriented microphone and lineout ports for easier access. Pin 1 3 5 7 9 Signal Name PORT 1L PORT 1R PORT 2R SENSE_SEND PORT 2L Pin 2 4 6 8 10 Signal Name AUD_GND PRESENCE# SENSE1_RETURN KEY SENSE2_RETURN F_USB1~4: Front Panel USB headers The motherboard has four USB ports installed on the rear edge I/O port array. Additionally, some computer cases have USB ports at the front of the case. If you have this kind of case, use auxiliary USB connector to connect the front-mounted ports to the motherboard. Pin 1 2 3 4 5 6 7 8 9 10 Signal Name USBPWR me USBPWR USB_FP_P0USB_FP_P1USB_FP_P0+ USB_FP_P1+ GND GND Key USB_FP_OC0 Function Front Panel USB Power Front Panel USB Power USB Port 0 Negative Signal USB Port 1 Negative Signal USB Port 0 Positive Signal USB Port 1 Positive Signal Ground Ground No pin NC COM2: Onboard serial port header Connect a serial port extension bracket to this header to add a second serial port to your system. Pin 1 2 3 4 5 6 7 8 Signal Name DCD me SIN SOUT DTR GND DSR RTS CTS Function Data Carrier Detect Serial Input UART B Serial Output UART B Data Terminal Ready Ground Data Set Ready RART B Request to Send Clear to Send Chapter 5 62