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  1. <html>
  2.  
  3. <head>
  4. <meta http-equiv="Content-Type"
  5. content="text/html; charset=iso-8859-1">
  6.  
  7.  
  8. <meta name="Author" content="Joakim Ögren">
  9. <meta name="Description"
  10. content="Pinout and description for the SCSI External Centronics 50 (Differential) connector.">
  11.  
  12. <meta name="Keywords"
  13. content="HwB, pinout, hardware, connector, scsi, external, centronics, differential">
  14. <title>HwB: SCSI External Centronics 50 (Differential) Connector</title>
  15.  
  16. </head>
  17.  
  18. <body background="images/bgr_grey.jpg" bgcolor="#C0C0C0"
  19. text="#000000" link="#0000EE" vlink="#551A8B" alink="#FF0000">
  20.  
  21.  
  22. <p align="center"><a href="menu_Connector.html"><img
  23. src="images/mini_Back.GIF" alt="GoTo Connector" border="0"
  24. width="64" height="48"></a><img src="images/menu_Connector.GIF"
  25. alt="CONNECTOR" width="400" height="48"><a href="hwb.html"><img
  26. src="images/mini_hwb.GIF" alt="GoTo Main" border="0" width="64"
  27. height="48"></a></p>
  28.  
  29.  
  30. <h1>SCSI External Centronics 50 (Differential)</h1>
  31.  
  32. <p><img src="images/conn_cent50f.GIF"
  33. alt="50 PIN CENTRONICS FEMALE" width="294" height="73">(At the
  34. controller & devices)<br>
  35. <img src="images/conn_cent50m.GIF" alt="50 PIN CENTRONICS MALE"
  36. width="294" height="73">(At the cable)</p>
  37.  
  38. <p>50 PIN CENTRONICS FEMALE at the controller & devices.<br>
  39. 50 PIN CENTRONICS MALE at the cable.</p>
  40.  
  41. <table border="1">
  42.     <tr>
  43.         <th>Pin</th>
  44.         <th>Name</th>
  45.         <th>Dir</th>
  46.         <th>Description</th>
  47.     </tr>
  48.     <tr>
  49.         <td>01</td>
  50.         <td>GND</td>
  51.         <td><img src="images/arrow.GIF" alt="---" width="32"
  52.         height="9"></td>
  53.         <td>Ground</td>
  54.     </tr>
  55.     <tr>
  56.         <td>02</td>
  57.         <td>+DB0</td>
  58.         <td><img src="images/arrowlr.GIF" alt="<->"
  59.         width="32" height="9"></td>
  60.         <td>+Data Bus 0</td>
  61.     </tr>
  62.     <tr>
  63.         <td>03</td>
  64.         <td>+DB1</td>
  65.         <td><img src="images/arrowlr.GIF" alt="<->"
  66.         width="32" height="9"></td>
  67.         <td>+Data Bus 1</td>
  68.     </tr>
  69.     <tr>
  70.         <td>04</td>
  71.         <td>+DB2</td>
  72.         <td><img src="images/arrowlr.GIF" alt="<->"
  73.         width="32" height="9"></td>
  74.         <td>+Data Bus 2</td>
  75.     </tr>
  76.     <tr>
  77.         <td>05</td>
  78.         <td>+DB3</td>
  79.         <td><img src="images/arrowlr.GIF" alt="<->"
  80.         width="32" height="9"></td>
  81.         <td>+Data Bus 3</td>
  82.     </tr>
  83.     <tr>
  84.         <td>06</td>
  85.         <td>+DB4</td>
  86.         <td><img src="images/arrowlr.GIF" alt="<->"
  87.         width="32" height="9"></td>
  88.         <td>+Data Bus 4</td>
  89.     </tr>
  90.     <tr>
  91.         <td>07</td>
  92.         <td>+DB5</td>
  93.         <td><img src="images/arrowlr.GIF" alt="<->"
  94.         width="32" height="9"></td>
  95.         <td>+Data Bus 5</td>
  96.     </tr>
  97.     <tr>
  98.         <td>08</td>
  99.         <td>+DB6</td>
  100.         <td><img src="images/arrowlr.GIF" alt="<->"
  101.         width="32" height="9"></td>
  102.         <td>+Data Bus 6</td>
  103.     </tr>
  104.     <tr>
  105.         <td>09</td>
  106.         <td>+DB7</td>
  107.         <td><img src="images/arrowlr.GIF" alt="<->"
  108.         width="32" height="9"></td>
  109.         <td>+Data Bus 7</td>
  110.     </tr>
  111.     <tr>
  112.         <td>10</td>
  113.         <td>+DBP</td>
  114.         <td><img src="images/arrowlr.GIF" alt="<->"
  115.         width="32" height="9"></td>
  116.         <td>+Data Bus Parity (odd Parity)</td>
  117.     </tr>
  118.     <tr>
  119.         <td>11</td>
  120.         <td>DIFFSENS</td>
  121.         <td>?</td>
  122.         <td>???</td>
  123.     </tr>
  124.     <tr>
  125.         <td>12</td>
  126.         <td>res</td>
  127.         <td>-</td>
  128.         <td>Reserved</td>
  129.     </tr>
  130.     <tr>
  131.         <td>13</td>
  132.         <td>TERMPWR</td>
  133.         <td><img src="images/arrowlr.GIF" alt="<->"
  134.         width="32" height="9"></td>
  135.         <td>Termination Power</td>
  136.     </tr>
  137.     <tr>
  138.         <td>14</td>
  139.         <td>res</td>
  140.         <td>-</td>
  141.         <td>Reserved</td>
  142.     </tr>
  143.     <tr>
  144.         <td>15</td>
  145.         <td>+ATN</td>
  146.         <td><img src="images/arrowl.GIF" alt="<--" width="32"
  147.         height="9"></td>
  148.         <td>+Attention</td>
  149.     </tr>
  150.     <tr>
  151.         <td>16</td>
  152.         <td>GND</td>
  153.         <td><img src="images/arrow.GIF" alt="---" width="32"
  154.         height="9"></td>
  155.         <td>Ground</td>
  156.     </tr>
  157.     <tr>
  158.         <td>17</td>
  159.         <td>+BSY</td>
  160.         <td><img src="images/arrowlr.GIF" alt="<->"
  161.         width="32" height="9"></td>
  162.         <td>+Bus is busy</td>
  163.     </tr>
  164.     <tr>
  165.         <td>18</td>
  166.         <td>+ACK</td>
  167.         <td><img src="images/arrowl.GIF" alt="<--" width="32"
  168.         height="9"></td>
  169.         <td>+Acknowledge</td>
  170.     </tr>
  171.     <tr>
  172.         <td>19</td>
  173.         <td>+RST</td>
  174.         <td><img src="images/arrowlr.GIF" alt="<->"
  175.         width="32" height="9"></td>
  176.         <td>+Reset</td>
  177.     </tr>
  178.     <tr>
  179.         <td>20</td>
  180.         <td>+MSG</td>
  181.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  182.         height="9"></td>
  183.         <td>+Message</td>
  184.     </tr>
  185.     <tr>
  186.         <td>21</td>
  187.         <td>+SEL</td>
  188.         <td><img src="images/arrowlr.GIF" alt="<->"
  189.         width="32" height="9"></td>
  190.         <td>+Select</td>
  191.     </tr>
  192.     <tr>
  193.         <td>22</td>
  194.         <td>+C/D</td>
  195.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  196.         height="9"></td>
  197.         <td>+Control or Data</td>
  198.     </tr>
  199.     <tr>
  200.         <td>23</td>
  201.         <td>+REQ</td>
  202.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  203.         height="9"></td>
  204.         <td>+Request</td>
  205.     </tr>
  206.     <tr>
  207.         <td>24</td>
  208.         <td>+I/O</td>
  209.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  210.         height="9"></td>
  211.         <td>+In/Out</td>
  212.     </tr>
  213.     <tr>
  214.         <td>25</td>
  215.         <td>GND</td>
  216.         <td><img src="images/arrow.GIF" alt="---" width="32"
  217.         height="9"></td>
  218.         <td>Ground</td>
  219.     </tr>
  220.     <tr>
  221.         <td>26</td>
  222.         <td>GND</td>
  223.         <td><img src="images/arrow.GIF" alt="---" width="32"
  224.         height="9"></td>
  225.         <td>Ground</td>
  226.     </tr>
  227.     <tr>
  228.         <td>27</td>
  229.         <td>-DB0</td>
  230.         <td><img src="images/arrowlr.GIF" alt="<->"
  231.         width="32" height="9"></td>
  232.         <td>-Data Bus 0</td>
  233.     </tr>
  234.     <tr>
  235.         <td>28</td>
  236.         <td>-DB1</td>
  237.         <td><img src="images/arrowlr.GIF" alt="<->"
  238.         width="32" height="9"></td>
  239.         <td>-Data Bus 1</td>
  240.     </tr>
  241.     <tr>
  242.         <td>29</td>
  243.         <td>-DB2</td>
  244.         <td><img src="images/arrowlr.GIF" alt="<->"
  245.         width="32" height="9"></td>
  246.         <td>-Data Bus 2</td>
  247.     </tr>
  248.     <tr>
  249.         <td>30</td>
  250.         <td>-DB3</td>
  251.         <td><img src="images/arrowlr.GIF" alt="<->"
  252.         width="32" height="9"></td>
  253.         <td>-Data Bus 3</td>
  254.     </tr>
  255.     <tr>
  256.         <td>31</td>
  257.         <td>-DB4</td>
  258.         <td><img src="images/arrowlr.GIF" alt="<->"
  259.         width="32" height="9"></td>
  260.         <td>-Data Bus 4</td>
  261.     </tr>
  262.     <tr>
  263.         <td>32</td>
  264.         <td>-DB5</td>
  265.         <td><img src="images/arrowlr.GIF" alt="<->"
  266.         width="32" height="9"></td>
  267.         <td>-Data Bus 5</td>
  268.     </tr>
  269.     <tr>
  270.         <td>33</td>
  271.         <td>-DB6</td>
  272.         <td><img src="images/arrowlr.GIF" alt="<->"
  273.         width="32" height="9"></td>
  274.         <td>-Data Bus 6</td>
  275.     </tr>
  276.     <tr>
  277.         <td>34</td>
  278.         <td>-DB7</td>
  279.         <td><img src="images/arrowlr.GIF" alt="<->"
  280.         width="32" height="9"></td>
  281.         <td>-Data Bus Pariy7</td>
  282.     </tr>
  283.     <tr>
  284.         <td>35</td>
  285.         <td>-DBP</td>
  286.         <td><img src="images/arrowlr.GIF" alt="<->"
  287.         width="32" height="9"></td>
  288.         <td>-Data Bus Pariy (odd Parity)</td>
  289.     </tr>
  290.     <tr>
  291.         <td>36</td>
  292.         <td>GND</td>
  293.         <td><img src="images/arrow.GIF" alt="---" width="32"
  294.         height="9"></td>
  295.         <td>Ground</td>
  296.     </tr>
  297.     <tr>
  298.         <td>37</td>
  299.         <td>res</td>
  300.         <td>-</td>
  301.         <td>Reserved</td>
  302.     </tr>
  303.     <tr>
  304.         <td>38</td>
  305.         <td>TERMPWR</td>
  306.         <td><img src="images/arrowlr.GIF" alt="<->"
  307.         width="32" height="9"></td>
  308.         <td>Termination Power</td>
  309.     </tr>
  310.     <tr>
  311.         <td>39</td>
  312.         <td>res</td>
  313.         <td>-</td>
  314.         <td>Reserved</td>
  315.     </tr>
  316.     <tr>
  317.         <td>40</td>
  318.         <td>-ATN</td>
  319.         <td><img src="images/arrowl.GIF" alt="<--" width="32"
  320.         height="9"></td>
  321.         <td>-Attention</td>
  322.     </tr>
  323.     <tr>
  324.         <td>41</td>
  325.         <td>GND</td>
  326.         <td><img src="images/arrow.GIF" alt="---" width="32"
  327.         height="9"></td>
  328.         <td>Ground</td>
  329.     </tr>
  330.     <tr>
  331.         <td>42</td>
  332.         <td>-BSY</td>
  333.         <td><img src="images/arrowlr.GIF" alt="<->"
  334.         width="32" height="9"></td>
  335.         <td>-Bus is busy</td>
  336.     </tr>
  337.     <tr>
  338.         <td>43</td>
  339.         <td>-ACK</td>
  340.         <td><img src="images/arrowl.GIF" alt="<--" width="32"
  341.         height="9"></td>
  342.         <td>-Acknowledge</td>
  343.     </tr>
  344.     <tr>
  345.         <td>44</td>
  346.         <td>-RST</td>
  347.         <td><img src="images/arrowlr.GIF" alt="<->"
  348.         width="32" height="9"></td>
  349.         <td>-Reset</td>
  350.     </tr>
  351.     <tr>
  352.         <td>45</td>
  353.         <td>-MSG</td>
  354.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  355.         height="9"></td>
  356.         <td>-Message</td>
  357.     </tr>
  358.     <tr>
  359.         <td>46</td>
  360.         <td>-SEL</td>
  361.         <td><img src="images/arrowlr.GIF" alt="<->"
  362.         width="32" height="9"></td>
  363.         <td>-Select</td>
  364.     </tr>
  365.     <tr>
  366.         <td>47</td>
  367.         <td>-C/D</td>
  368.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  369.         height="9"></td>
  370.         <td>-Control or Data</td>
  371.     </tr>
  372.     <tr>
  373.         <td>48</td>
  374.         <td>-REQ</td>
  375.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  376.         height="9"></td>
  377.         <td>-Request</td>
  378.     </tr>
  379.     <tr>
  380.         <td>49</td>
  381.         <td>-I/O</td>
  382.         <td><img src="images/arrowr.GIF" alt="-->" width="32"
  383.         height="9"></td>
  384.         <td>-In/Out</td>
  385.     </tr>
  386.     <tr>
  387.         <td>50</td>
  388.         <td>GND</td>
  389.         <td><img src="images/arrow.GIF" alt="---" width="32"
  390.         height="9"></td>
  391.         <td>Ground</td>
  392.     </tr>
  393. </table>
  394.  
  395. <address>
  396.     <em>Note: Direction is Device relative Bus (other Devices).</em>
  397. </address>
  398.  
  399. <address>
  400.     <font size="2">Contributor: </font><a
  401.     href="mailto:qtech@mailhost.net"><font size="2">Joakim Ögren</font></a><font
  402.     size="2">, </font><a href="mailto:Karsten.Wenke@t-online.de"><font
  403.     size="2">Karsten Wenke</font></a>
  404. </address>
  405.  
  406. <address>
  407.     <font size="2">Source: ?</font>
  408. </address>
  409.  
  410.  
  411. <address>
  412.     <font size="1">Please send any comments to </font><a
  413.     href="mailto:qtech@mailhost.net"><font size="1">Joakim Ögren</font></a><font
  414.     size="1">.</font>
  415. </address>
  416.  
  417. </body>
  418. </html>