20
2.3.9 Universal Serial Bus (USB)
The USB is suitable for mid-to-low speed devices like mouse, keyboard, joystick...etc. In the past,
all these devices were using different connectors, and it is difficult for end users to install the
system. With USB technology, users only need to plug all their USB peripherals on the connector
in chain and ready to go.
The motherboard supports following USB features:
Self-identifying, hot pluggable peripherals
Support of isochronous and asynchronous transfer type
Supports for a maximum of 127 physical devices
Supports data transfer rate up to 12 Mbit/sec
The motherboard has two USB ports; any USB peripheral can be connected to either port. For more
than two USB devices, an external hub can be connected to either port.
2.3.10 PS/2 keyboard and mouse connectors (KB and MS)
The keyboard connector is a 6-pin mini-DIN connector located on the back panel (the bottom one).
Simply connect the standard PS/2 keyboard into this connector. The PS/2 mouse connector is a 6-
pin mini-DIN connector on the back panel. Simply connect the PS/2 mouse into this connector.
Note that power to the computer should be turned off before a keyboard and/or mouse is connected
or disconnected.
2.3.11 ATX power connector (PWR)
This motherboard supports an ATX power connector. Simply connect the power cord of power
supply to this connector.
Signal of ATX power supply connector
Pin 1 ---------- +3.3 V
Pin 11 ---------- +3.3 V
Pin 2 ---------- +3.3 V
Pin 12 ---------- +12 V
Pin 3 ---------- Ground
Pin 13 ---------- Ground
Pin 4 ---------- +5 V
Pin 14 ---------- PWR_ON#
Pin 5 ---------- Ground
Pin 15 ---------- Ground
Pin 6 ---------- +5 V
Pin 16 ---------- Ground
Pin 7 ---------- Ground
Pin 17 ---------- Ground
Pin 8 ---------- PWRGOOD
Pin 18 ---------- -5 V
Pin 9 ---------- +5VSB
Pin 19 ---------- +5 V
Pin 10 -------- +12 V
Pin 20 ---------- +5 V
