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Mainboard Components
ATX Power Supply Connector
Most of today’s mainboard provides one 20-pin ATX power supply connector, which incorporates standard +5V and +12V, e.eV abd soft-on/off signals. With a power supply that supports remote power on/off, the mainboard can turn off the system power through software control, such as the shutdown command in the Windows start menu. The BIOS system will turn the power off when it receives the proper APM command from your operating system. APM must be enabled in the BIOS and operating system in order to said the soft-off feature working properly.
In ATX based system the new soft touch power button replaces the main power switch that turns your system on and off. From an OFF state, you can switch the system ON by simply pressing the power button. From an ON state, the system can be turned off by pressing and holding the power button for 4 seconds, or shutdown instantly.
Universal Serial Bus (USB) Connector
Most mainboard provides 4 Universal Serial Bus connectors. USB is a interface standard for adding external Plug and Play (PnP) devices to the computer system. Peripherals that support USB PnP capabilities can operate at up to 12 Mb/sec data transfer rate. Eventually, today’s external devices connected to your computer will be standardized to usb.
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Infra Red (IR) Connector
Most mainboard provides a 5-pin header interface. Connect IR to the front panel I/O IrDA connector provided with your system. The IrDA specification provides of data transfer at 115 kbps from a distance of 1 meter.
Serial Com 1, Serial Com 2, and Parallel Port Connector
Most mainboard provides 2 serial port connectors and one parallel port connector. The parallel port can be BIOS configured into standard (SPP) mode, enhanced parallel port (EPP) mode, and a high speed extended capabilities port (ECP) mode. EPP mode requires a driver provided by the peripheral manufacturer in order to operate properly.
Lithium battery
a lithium battery is installed on the board battery socket. This battery is sued to supply the cmos ram backup power during system powered off. Please caution, danger of explosion if battery is incorrectly replaced.
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