Acer Aspire M3450 Acer Aspire M3450 Desktop Service Guide - Page 102

SATA1~6: Serial ATA connectors These connectors are used to support the new Serial ATA devices for the highest date transfer rates (6.0 Gb/ s), simpler disk drive cabling and easier PC assembly. It eliminates limitations of the current Parallel ATA interface. But maintains register compatibility and software compatibility with Parallel ATA. Pin Signal Name 1 Ground 3 TX- 5 RX- 7 Ground Pin Signal Name 2 TX+ 4 Ground 6 RX+ F_USB1~4: Front Panel USB 2.0 headers The motherboard has four USB 2.0 ports installed on the rear edge I/O port array. Addition-ally, some computer cases have USB 2.0 ports at the front of the case. If you have this kind of case, use auxiliary USB 2.0 connector to connect the front-mounted ports to the motherboard. Pin Signal Name 1 USBPWR 2 USBPWR 3 DATA0- 4 DATA1- 5 DATA0+ 6 DATA1+ 7 GND 8 GND 9 NC 10 USB DET 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 Signa Ground Ground Not connected USB DET NOTE: Please make sure that the USB cable has the same pin assignment asindicated above. A different pin assignment may cause damage or systemhang-up. 94 Chapter 5