Keyboard And Mouse Interface; Universal Serial Bus (Usb); Ps/2 Keyboard/Mouse Connectors - Intel MS440GX Product Manual

Keyboard and Mouse Interface

PS/2 keyboard and mouse connectors are located on the back panel (see Figure 15/Callouts A
and B). The 5V lines to these connectors are protected with a PolySwitch
healing fuse, reestablishes the connection after an over-current condition is removed.
NOTE
The mouse and keyboard can be plugged into either of the PS/2 connectors. Power to the
computer should be turned off before a keyboard or mouse is connected or disconnected.
The keyboard controller contains the AMI Megakey keyboard and mouse controller code, provides
the keyboard and mouse control functions, and supports password protection for power on/reset. A
power on/reset password can be specified in Setup.
The keyboard controller also supports the hot-key sequence <Ctrl><Alt><Del> for a software
reset. This key sequence resets the computer's software by jumping to the beginning of the BIOS
code and running the Power-On Self Test (POST).
Table 36.

PS/2 Keyboard/Mouse Connectors

Pin Signal Name
1 Data
2 No connect
3 Ground
4 +5 V (fused)
5 Clock
6 No connect

Universal Serial Bus (USB)

The motherboard has two USB ports. One USB peripheral can be connected to each port. For
more than two USB devices, an external hub can be connected to either port. The motherboard
fully supports the universal host controller interface (UHCI) and uses UHCI-compatible software
drivers.
NOTE
Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Class B requirements, even if no device or a low-speed USB device is attached to the cable. Use
shielded cable that meets the requirements for high-speed devices.
Technical Reference
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