Parallel pinout
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Parallel pinout| kayess2004 |
Posted: August 18, 2005 12:37 am
 
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 Newbie  Group: Members+ Posts: 5 Member No.: 3,051 Joined: August 15, 2005  |
Hi all,
Just a quick question regarding a previous post. Geek provided me with a matrix key layout fro a project I am working on  What I would like to know is which pins should I connect these to on a parallel (printer) cable to allow data to be sent to the PC.  Thanks |
 
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| ghimpe-- |
Posted: August 18, 2005 12:52 am
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 Forum Addict ++ Group: Trusted Members Posts: 1,202 Member No.: 1,795 Joined: January 05, 2005 |
-------------------- It's nice to be important, but it's more important to be nice!
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| kayess2004 |
Posted: August 18, 2005 01:06 am
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Newbie Group: Members+ Posts: 5 Member No.: 3,051 Joined: August 15, 2005 |
Gee ghimpe-- thanks for your inciteful reply. That was very helpful - not -.
Can we just take it as given that I have done the google thing, still not sure what I'm looking at and so posted here to try and get it clarified. |
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| ghimpe-- |
Posted: August 18, 2005 01:34 pm
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Forum Addict ++ Group: Trusted Members Posts: 1,202 Member No.: 1,795 Joined: January 05, 2005 |
Ok, let take this link for example: http://www.interfacebus.com/Design_Connect...el_PC_Port.html
You have there all the pins described. You are a programer so the rest should be easy work  You could also search this forum for parallel stuff, you will find lot's of hits. -------------------- It's nice to be important, but it's more important to be nice!
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| Nettron |
Posted: August 19, 2005 02:03 am
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 Forum Addict ++ Group: Trusted Members Posts: 1,471 Member No.: 101 Joined: August 01, 2002 |
Best bet would be to use a row-column encoder IC such as a 74922.
-------------------- ..please stop confusing the issue with facts.
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| Maddogg6 |
Posted: December 13, 2005 10:50 pm
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Member Group: Trusted Members Posts: 140 Member No.: 3,833 Joined: December 13, 2005 |
*Normally* the D0-D8 are the 'Parallel' data lines.
The G0-7 are the respective grounds (for long cables - makes D0-D7 twisted pairs for higher noise immunity) The 'C' and 'S' are rarely used and may or may not be accessable depending on PC HW / SW. -------------------- Piece,
Mark =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+= Not so famous for sayings like: "Once you've seen it once, you've seen it once" And Jokes like: "What do ya get when you combine Jenna Jameson & Betty Crocker? - Dunno? Me either, but I'd love to meat her." |
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| Jimthecopierwrench |
Posted: December 30, 2005 09:20 pm
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 Moderator  Group: Moderators Posts: 7,767 Member No.: 561 Joined: January 10, 2004 |
Hell yes. Huh, just looked at the DATASHEET (from 1995), didn't know the animal existed. Nice IC. Ooh, looky... Though I generally don't condone powering a circuit from the port, the IC has a wide operating Vcc range and <1.5mA draw - no problem for the port. Also nice is the on board debouncing feature and data validation output. Depending on how you intend to read your data this can be very useful for presenting stable data to the port. -------------------- Stranded in time. Surrounded by evil. Low on gas...
"On a long enough time line - the survival rate for everyone drops to zero." When the going gets wierd, the wierd turn pro. Hunter S. Thompson. |
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| yogi |
Posted: June 04, 2006 12:11 am
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Newbie Group: Members+ Posts: 32 Member No.: 4,837 Joined: April 15, 2006 |
r u talking abt matrix keypad. I have done the same. I have explained about in my book. See it then u will get things clear
MY EXPERIENCE IN PARALLEL PORT INTERFACING you can get it from yahoo group-booksbybibin http://groups.yahoo.com/group/booksbybibin/ comments about this book http://www.booksbybibin.blogspot.com/ delete |
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