During placement, following three stages happens: Global Placement Global placement is very first stage of the placement where cells are placed inside the core area for the first time looking at the timing and congestion. Global Placement aims at generating…
Pre-Placement Sanity Checks Before going for the placement of these standard cells, we need to have some checks known as pre-placement sanity checks as mentioned below. We perform these sanity checks at pre-placement stage of the design. Floating pins in…
What is Placement? Once we are done with the floorplan after placing all the physical cells inside the core boundary, we are left with standard cells which are still sitting out of the core design area. Now we need to…
Pin Placement Power Mux placement
Power Ground Grid Insertion
Power Switch Cell Placement Drawbacks In the above figure we can see that power switch cells are placed in array pattern in rows.
Tap Cell Placement: Latch-up condition: Latch-up basically means a short circuit condition between power and ground. Due to this short circuit condition, a low impedance path is created. So in order to limit this resistance between power and ground connections…
What is Boundary Cap (End Cap) ? In the above picture, we can see that all the boundary cap cells are sitting at the periphery of the design and within the area bounded by the boundary cap, we place Standard…
Level Shifter Cell:
Retention Flops: