Difference between revisions of "CSC270 Final Exam 2012"
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==Important Information== | ==Important Information== | ||
| − | * If you decide to design an input port for the 6811, <font color="red">you must make wait and not connect the output of the tristate buffers to the data bus '''until''' you are sure that you have a short negative pulse on the enable of your drivers (assuming an active-low enable)</font>. Once you observe the negative pulse for the enable of the drivers can you complete the connection to the data bus. See the ''' | + | * If you decide to design an input port for the 6811, <font color="red">you must make wait and not connect the output of the tristate buffers to the data bus '''until''' you are sure that you have a short negative pulse on the enable of your drivers (assuming an active-low enable)</font>. Once you observe the negative pulse for the enable of the drivers can you complete the connection to the data bus. See the '''yellow signal''' in the photo below for reference. |
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<center>[[File:6811IO1.jpg|500px]]<br />(Waveform captured by Tiffany Liu)</center> | <center>[[File:6811IO1.jpg|500px]]<br />(Waveform captured by Tiffany Liu)</center> | ||
