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Download User Manual - PIC mikrokontroleri
Transcript
LABCENTER ELECTRONICS Connectivity Highlight Connectivity Highlight mode is selected by clicking left on the Connectivity Highlight icon. You can then: • Highlight/tag a group of pads, tracks and vias connected to a pad by clicking left on the pad. • Highlight all pads, tracks and vias connected to a net by selecting the required net from the Object Selector and then clicking left on the 'T' toggle. • Delete all tagged pads, tracks and vias by clicking left on the Delete icon. Combined with the above this provides the means to rip up all tracking associated with a given net. • Untag all pads/tracks/vias by clicking right at a point where there is no object or else by invoking the Redraw command. RATSNEST FEATURES The term Ratsnest is used to describe the pattern you get on the screen when the pin to pin connections specified in the netlist are shown as single straight lines rather than copper tracking. Once a netlist has been loaded and the components placed (or vice versa for that matter) the ratsnest gives a good visual impression of the complexity of the routing task that is before you or the autorouter. Furthermore, it gives an indication of the quality of component placement since the presence of lots of long ratsnest lines suggests that some components would be better placed closer together. Automatic Ratsnest Recalculation ARES keeps the ratsnest up to date and optimized at all times. Add a component or delete a track and new ratsnest lines will appear. Make connections and ratsnest lines will disappear. It’s as simple as that. The term ‘optimization’ refers to that fact that ARES always displays the ‘Minimum Spanning Tree’ for each net. This means that the displayed ratsnest lines always represent the shortest interconnection pattern between the pads. The ratsnest can be turned off wholesale by using the checkbox on the Layers dialogue on the Display menu. Ratsnest lines related to a particular strategy can also be turned on and off using the Set Strategies command on the System menu. 72
