Interface type is a keyboard connected to the host computer interface mode or type. Currently on the market, there are three common HP Pavilion DV7Z Keyboard
interface: old AT interface, PS / 2 interface and USB interface. Old AT interface, commonly known as Sandy, has been basically eliminated, so no introduction.
PS / 2 interface
First appeared in IBM's PS / 2 machine on, so get this name. This is a special mouse and keyboard interface, a 6-pin circular interface, but the keyboard is only one of the 4-pin to transfer data and power, and the remaining two empty feet. PS / 2 interface transfer rate slightly faster than the COM interface, but the ATX motherboard standard interface, and is currently one of the most widely used keyboard interface.
You can use the keyboard and mouse PS / 2 interface, but in accordance with PC'99 color specification, the mouse usually takes up light green interface, the keyboard occupies purple interface. Although it seems from the above definition of the two pins work the same, but the two interfaces can not be mixed or plug, which is inside the computer by their different signal definitions of the decision.
USB's full name is the Universal Serial Bus, USB hot-swappable, plug and play advantage, so the USB interface MP3 has become the most important interfaces. USB has two standards, namely, USB1.1 and USB2.0.
PS / 2 and USB keyboard in use is not very different, because the USB interface, hot-swappable, so USB keyboards in use may be a little convenient. However, the underlying computer hardware for PS / 2 interface support more satisfactory, so if you encounter some of the computer failure, a PS / 2 keyboard interface, better compatibility. Mainstream use of both keyboard PS / 2 interface has a USB interface, need to choose the time of purchase. Between various HP Pavilion DV7Z Keyboard
interface adapter or through specific adapter cable to achieve conversion, such as a USB to PS / 2 adapter top.