Bookmark /  Discuss  /  Edit  this page or submit new.
6 pin mini-DIN female (PS/2 STYLE) connector layout
6 pin mini-DIN female (PS/2 STYLE) connector
at the computer
Very common connector. The PS/2 keyboard interface electronically identical to the long-established AT interface, but the cable connector is a 6-pin mini-DIN interface.

The PCs keyboard implements a bi-directional protocol. The keyboard can send data (so called scan codes, unique for each button - one for button pressed, another for button released) to the Host and the Host can send data to the Keyboard. The keyboard is free to send data to the host when both the KBD Data and KBD Clock lines are high (Idle). The KBD Clock line can be used as a Clear to Send line. If the host takes the KBD Clock line low, the keyboard will buffer any data until the KBD Clock is released, ie goes high. Should the Host take the KBD Data line low, then the keyboard will prepare to accept a command from the host.

The transmission of data in the forward direction, ie Keyboard to Host is done with a frame of 11 bits. The first bit is a Start Bit (Logic 0) followed by 8 data bits (LSB First), one Parity Bit (Odd Parity) and a Stop Bit (Logic 1). The Keyboard will generate the clock, typical frequency of the clock signal ranges from 20 to 30 Khz.

Pin Function Dir Description
1 DATA <-> Key Data
2 n/c or DATA2 for dual PS2 - Not connected
3 GND --- Gnd
4 VCC --> Power , +5 VDC
5 CLK --> Clock
6 n/c or CLK2 for dual PS2 - 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.

Is this document correct or incorrect?.
There are 20 reports in our database: 17 positive and 2 negative.
Pinouts.ru > Input devices (keyboards, mices, joysticks) > Pinout of Keyboard PS/2 and layout of 6 pin mini-DIN female (PS/2 STYLE) connector
This page contain parts under Copyright © 2000-2014 by pinouts.ru team.
No portion of this webpage may be reproduced in any form without providing visible HTML link to Pinouts.ru . Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.