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- <TITLE>Parallel Ports</TITLE>
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- <H1>Parallel Ports</H1>
- <P>These ports have check boxes for pins programmed as inputs and display boxes for pins programmed as outputs. Outputs are
- not updated while simulations are running, however inputs are active when simulations are running via the "Go" or "Step
- Over" buttons.</P>
- <br>
- <img src="portjh.gif" width="437" height="139" align=right >
- <p>The ports displayed depend on the processor operating mode, with ports J and H being
- generally available, port D added for Narrow Memory mode, and ports A and B additionally
- added for Single Chip mode. In the case of the 68HC912B32, only ports A and B are provided.</p>
- <p>When the Log Changes box is checked, any changes to the outputs
- are logged, giving their time (in E/P clocks) and new value. The
- logging line looks like this:</P>
- <PRE>PORTH,10022,34,22</PRE>
- <P>Where <EM>PORTH</EM> is the event name (Port H output changed), <EM>10022</EM>
- is the time, <EM>34 </EM>is the value in decimal, and <EM>22</EM> is the value in
- hexadecimal.</P>
- <P>When the key wakeup interrupt feature is used, the interrupts are edge sensitive and won't be captured until the next P-clock.
- Key wakeup on port D uses the same interrupt as the External interrupt pin.</P>
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