interfacing keyboard to 8051... need urgent help!!!

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hot_ice

Joined: 07 Feb 2006
Posts: 36

02 Jun 2006 6:09 interfacing keyboard with 8051

i want to interface the keyboard (one having 101 keys; attatched to PC) to the 8051... i've got only 7 unsed pins... is it possible to it uisng only 7 pins... if yes, how??? please give schematic, some source code or any other good tutorial... thx!!!

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wek

Joined: 21 Dec 2004
Posts: 239
Helped: 26

02 Jun 2006 8:32 interfacing keyboard to 8051... need urgent help!!!

http://www.8052.com/sbc/ps2key/

VVV

Joined: 26 Nov 2004
Posts: 1584
Helped: 290

05 Jun 2006 17:21 Re: interfacing keyboard to 8051... need urgent help!!!

Here is an appnote from Philips. You just need to get the characters from the keyboard, not retransmit the codes over I2C. So you can just ignore that part, but the rest should be helpful.

www.semiconductors.philips.com/acrobat_download/applicationnotes/AN434.pdf