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PS/2 (Personal System/2) Port

PS/2 (Personal System/2) Port

The PS/2 (Personal System/2) Port, also referred to as the mouse port or keyboard port, was developed by IBM. It is used to connect a computer mouse or keyboard to an IBM compatible computer. The PS/2 port is a mini DIN plug that contains six pins and is still sometimes found on all IBM compatible computers.


PS/2 Mouse Cable

6 pin PS/2 specifications

Pin Voltage Assignment
1 +2.0 to +5.5v Keyboard Data
2 +4.8 to +5.5v Reserved
3 Ground Ground
4 +2.0 to +5.5v +2.0 to +5.5v
5 +2.0 to +5.5v Keyboard Clock
6 +2.0 to +5.5v Reserved