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<html>
<head>
<title>EAGLE Help: TECHNOLOGY</title>
</head>
<body bgcolor=white>
<font face=Helvetica,Arial>
<hr>
<i>EAGLE Help</i>
<h1><center>TECHNOLOGY</center></h1>
<hr>
<dl>
<dt>
<b>Function</b>
<dd>
Defines the possible <i>technology</i> parts of a device name.
<p>
<dt>
<b>Syntax</b>
<dd>
<tt>TECHNOLOGY name ..;</tt><br>
<tt>TECHNOLOGY -name ..;</tt><br>
<tt>TECHNOLOGY -* ..;</tt>
<p>
</dl>
<b>See also</b> <a href=66.htm>PACKAGE</a>
<p>
This command is used in the device editor mode to define the possible <i>technology</i>
parts of a device name. Exactly one of the names given in the TECHNOLOGY command will
be used to replace the <tt>'*'</tt> in the device set name when an actual device is added
to a schematic.
The term <i>technology</i> stems from the main usage of this feature in creating
different variations of the same basic device, which all have the same schematic
symbol(s), the same package and the same pin/pad connections. They only differ in
a part of their name, which for the classic TTL devices is related to their
different technologies, like "L", "LS" or "HCT".
<p>
The TECHNOLOGY command can only be used if a package variant has been selected with the <a href=66.htm>PACKAGE</a> command.
<p>
If no <tt>'*'</tt> character is present in the device set name, the technology will
be appended to the device set name to form the full device name. Note that the technology
is processed before the package variant, so if the device set name contains neither
a <tt>'*'</tt> nor a <tt>'?'</tt> character, the resulting device name will consist
of <i>device_set_name</i><tt>+</tt><i>technology</i><tt>+</tt><i>package_variant</i>.
<p>
The names listed in the TECHNOLOGY command will be added to an already existing list
of technologies for the current device.
Starting a name with <tt>'-'</tt> will remove that name from the list of technologies.
If a name shall begin with <tt>'-'</tt>, it has to be enclosed in quotes.
Using <tt>-*</tt> removes all technologies.
<p>
Only ASCII characters in the range 33..126 may be used in technologies (lowercase characters
will be converted to uppercase), and the maximum number of technologies per device is 254.
<p>
The special "empty" technology can be entered as two quotes (<tt>''</tt>, an empty string).
<p>
<b>Example</b>
<p>
In a device named "<tt>74*00</tt>" the command
<pre>
TECHNOLOGY -* '' L LS S HCT;
</pre>
would first remove any existing technologies and then create the individual technology variants
<pre>
7400
74L00
74LS00
74S00
74HCT00
</pre>
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