The General settings (shown in the following figure) define the display characteristics of the net connections on the device.
Figure 1.
Device
Window—General Settings
The following settings are available:
Nets
- High fanout net limit
- Limits the number of connections a pin can have to be displayed. The nets on a pin with a fanout greater than the specified number of connections are not displayed.
- Show I/O Nets
- Toggles the display of I/O connectivity to placed logic or Pblocks.
Snap To
The following are the available snapping modes while drawing the Pblock.
- Tile
- Creates a Pblock with the tile-based snapping mode (default).
- Clock Region
- Creates a block with the Clock Region snapping mode
- SLR
- Creates a Pblock with the SLR snapping mode. This option is only enabled on devices with multi SLRs.
Lock Pblocks
- Lock Pblock
- Locks all the existing Pblocks in the device view. This option is disabled by default. Press, hold, and draw does not move the Pblock after enabling this option.
Routing
- Leave existing routing
- Leaves all routes intact. In most cases, this results in antennas and unrouted branches.
- Unroute branches
- Unroutes branches to the original placement. In most cases, this results in unrouted branches.
- Unroute and reroute branches
- Unroutes branches to the original placement and reroutes the branches to the new placement. In most cases, this results in completely routed nets.
Miscellaneous
- Autocheck I/O Placement
- Toggles automatic enforcement of interactive I/O placement DRCs. When this mode is enabled, interactive I/O port placement is checked against enabled design rules.