please dont rip this site

moved to Parallel Port Signal Detail

Fig 10-2
DB-25
Pin		 Driven by Signal Name Cent
Pin
1 Host /Strobe 1 Tells the printer that data is available on Data 0-7. Pulse width must be more than 0.5us. Must be high if Busy or /Acknowledge are also high. driven by 7405 inverting open collector buffers, pulled to +5 volts via 4.7K resistors.
2 Host Data 0 2 Data lines must be valid 0.5us before falling edge of Strobe signal.

The Data Out pins were orginally driven by a 74LS374 octal latch, which could source 2.6 mA and sink 24 mA. It is essential that the external device not try to pull these lines to ground, as this might cause the 74LS374 to source more current than it could handle without damage. Exception: bidirectional printer ports allow the 74LS374 (or equivalent) driver chip to be tri-stated.
3 Host Data 1 3
4 Host Data 2 4
5 Host Data 3 5
6 Host Data 4 6
7 Host Data 5 7
8 Host Data 6 8
9 Host Data 7 9
10 Printer /Ack 10 Pulse width approx 3us. Asserted when Busy goes off or after data is accepted. Also pulsed when printer comes on line after power on, reset, or operater selects online mode. Inverted in Status Input register
11 Printer Busy 11 Indicates that the printer is busy. Asserted during reading of data, printing, errors, and when offline.
12 Printer Out of Paper 12
13 Printer Select 13 High when printer is online.
14 Host /Auto Feed 14 driven by 7405 inverting open collector buffers, pulled to +5 volts via 4.7K resistors.
15 Printer /Error 32
16 Host /Initialize 31 driven by 7405 inverting open collector buffers, pulled to +5 volts via 4.7K resistors. Double inverted from the control register.
17 Host /Select Input 36 driven by 7405 inverting open collector buffers, pulled to +5 volts via 4.7K resistors.
18-35 Both Ground 30
Ground returns 19-29

See also:

file: /techref/io/parallel.htm, 7KB, , updated: 2009/9/17 12:05, local time: 2009/11/22 11:25,
TOP NEW HELP FIND: 
38.107.191.102:LOG IN
©2009 PLEASE DON'T RIP! DO: LINK / DIGG! / MAKE!
 ©2009 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!
<A HREF="http://www.piclist.com/techref/io/parallel.htm"> Centronix Parallel Ports</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 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?
  LCD Front Panel Set: $8.99!
- 2x16 LCD HD44780 controller
- 4 push buttons - 3 LEDs - 2x12 header
 
miSim DE is an excellent, portable and powerful IDE for developing PIC applications.
The only consistant, simple to use yet powerful development environment. It simulates real-world devices via virtual component "plugins" (LED,LCD,key,motor,TV,etc) in real time, has a syntax highlighting editor, macro assembler and disassembler. Regular updates and third-party plugins keep this software ahead of any other PIC IDE.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .