In a High Speed environment, actual and target values for track length can be displayed. These are displayed for each pin pair of a signal, for which a pin pair is defined. They are displayed in the Routing Balloon. Target values are specified in Constraint Browser. The target value for an unconnected portion of track is calculated as manhattan length.
Checking the Track Length for a Pin Pair
Check the track length for each pin pair, as follows.
- Create pin pairs on signals and, if necessary, set the minimum and maximum track length rules. See: Creating Pin Pairs Collectively.
- Click View > Canvas
>
on the eCADSTAR PCB Editor
ribbon (2D View mode only). The
Routing Balloon
is displayed. - If you select a signal for which a pin pair has been created, then the following routing data is shown in the Routing Balloon for the pin pair. If minimum and maximum track length rules are set, then two white triangles are displayed on the bar. Actual values that fall within the rule are shown in green. Values that violate it are shown in red.
Pin pair name: Actual value/target value [minimum track length rule:maximum track length rule]
Routing Tracks while Checking Track Length
You can route tracks while keeping the Routing Balloon displayed. Actual and target values for the tracks are updated, in real time.
Moving a Track
Move a track while checking its length, as follows.
- Using the Move or Move Section command, move a track. See: Moving Routing Patterns . Alternately, move a meander line using the Lengthen command. See: Adjusting Track Length.
- For the Move or Move Section commands, the difference in track length before and after moving the track are shown in the Routing Balloon.
- The Lengthen command shows the length of the meander line as follows.
Pin pair name: Actual value/target value (difference or meander line length)
Routing Tracks while Checking the Length from the Pin
With the Routing Balloon displayed, route a track on the canvas. The length from the pin is updated, in real time, in the Routing Balloon. The following information is displayed.
Length from pin [Component reference (pin name)]: Actual value
When a differential pair is routed, the difference in the length from the pin is also displayed
Length from pin [Component
reference (pin name)]: Actual value
Length from pin [Component reference (pin name)]: Actual value
Length difference: Actual value
The length from the pin does not include the length of unrouted nets.
