Keyboard PS/2

Pin	Name	Dir	Description
1	DATA		Key Data
2	n/c	-	Not connected
3	GND		Gnd
4	VCC		Power , +5 VDC
5	CLK		Clock
6	n/c	-	Not connected

The keyboard and auxiliary device signals are driven by open-collector drivers pulled to 5Vdc through a pull-up resistor.

Sink current Max: 20mA ;Hi-level output V Min 5.0 Vdc minus pull-up ;Low-level Output v Max 0.5 Vdc; High-level input v Min 2.0 Vdc; Low-level input v Max 0.8 Vdc.

Note: Direction is Computer relative Keyboard.