please dont rip this site

PIC Microcontroler based Keyboards

4x4 keyboard with only 4 io pins: 


    Key         SET PORT B TO                READ PORT B AS
           RB3  RB2  RB1  RB0     |     RB3   RB2   RB1   RB0
    SW1     HiZ  HiZ  HiZ   0      |      0     0     1     X
    SW2     HiZ  HiZ  HiZ   0      |      0     1     0     X
    SW3     HiZ  HiZ  HiZ   0      |      0     1     1     X
    SW4     HiZ  HiZ  HiZ   0      |      1     0     0     X
    SW5     HiZ  HiZ   0   HiZ     |      0     0     X     1
    SW6     HiZ  HiZ   0   HiZ     |      0     1     X     1
    SW7     HiZ  HiZ   0   HiZ     |      0     1     X     0
    SW8     HiZ  HiZ   0   HiZ     |      1     0     X     1
    SW9     HiZ   0   HiZ  HiZ     |      0     X     1     1
    SW10    HiZ   0   HiZ  HiZ     |      0     X     0     1
    SW11    HiZ   0   HiZ  HiZ     |      0     X     1     0
    SW12    HiZ   0   HiZ  HiZ     |      1     X     0     1
    SW13     0   HiZ  HiZ  HiZ     |      X     0     1     1
    SW14     0   HiZ  HiZ  HiZ     |      X     1     0     1
    SW15     0   HiZ  HiZ  HiZ     |      X     1     1     0
    SW16     0   HiZ  HiZ  HiZ     |      X     0     0     1

See also: http://www.mikerj.clara.net/keypad.html

Questions:

file: /Techref/microchip/4x4key4io8diode.htm, 1KB, , updated: 2020/6/28 17:53, local time: 2024/11/26 05:43,
TOP NEW HELP FIND: 
3.16.70.99:LOG IN
 ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://techref.massmind.org/Techref/microchip/4x4key4io8diode.htm"> PIC Microcontroller, Microchip PIC, 4x4 Keyboard, Keyswitch</A>
After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?
 

Welcome to massmind.org!

 

Welcome to techref.massmind.org!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .