Hardware Reference
In-Depth Information
Figure 15.9. Keyboard and mouse connectors.
Table 15.2. Keyboard Connector Signals and Specifications
PS/2 mouse devices also use the 6-pin mini-DIN connector and have the same pinout and signal
descriptions as the keyboard connector; however, the data packets are incompatible.
USB keyboards use the Series A USB connector to attach to the USB port built into modern
computers. For more information on USB, refer to
Chapter 14
, “
External I/O Interfaces
.
”
USB Keyboards
Virtually all keyboards now on the market connect to the PC via a USB port instead of a PS/2
keyboard port. Because USB is a universal bus that uses a hub to enable multiple devices to connect
to a single port, a single USB port in a system can replace the standard serial and parallel ports as
