eminem198123
Junior Member level 1
- Joined
- Sep 13, 2006
- Messages
- 19
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,281
- Location
- Beijing, China
- Activity points
- 1,401
1。As you know, the OVERLAP layer in LEF is for defining rectilinear blocks, now I want list all the physical box for this layer, what command or TCL scripts can I use?
2。I want to cut a routing blockage in one floorplan to make routing guides. For example, I dont have M5 cell routing blockage in a LEF hard block, I add this routing blockage at the top level, I have to cut some notches according to the pin shapes (if pins are on M5), then router can make M5 connections to these pins without DRC. How can I cut these notches on the added M5 routing blockage, this is more like a polygon operation, do Encounter have such db commands? I dont want to modify the LEF file (to add the M5 obstruction).
3。I want to know how encounter keep the hierarchy information of a design, since all backend tools make a design in virtual flat mode. But it should have some mechanism to keep the hierarchy informations. It uses this information to dump a new hierarchical netlist for later design STA or something. (As far as I know, MAGMA's Blast Fusion use split cells which has the same name as the hierarchical term to keep the hierarchy infomations)
Thanks in advance!!
2。I want to cut a routing blockage in one floorplan to make routing guides. For example, I dont have M5 cell routing blockage in a LEF hard block, I add this routing blockage at the top level, I have to cut some notches according to the pin shapes (if pins are on M5), then router can make M5 connections to these pins without DRC. How can I cut these notches on the added M5 routing blockage, this is more like a polygon operation, do Encounter have such db commands? I dont want to modify the LEF file (to add the M5 obstruction).
3。I want to know how encounter keep the hierarchy information of a design, since all backend tools make a design in virtual flat mode. But it should have some mechanism to keep the hierarchy informations. It uses this information to dump a new hierarchical netlist for later design STA or something. (As far as I know, MAGMA's Blast Fusion use split cells which has the same name as the hierarchical term to keep the hierarchy infomations)
Thanks in advance!!