Table of Contents
Why do we use endcap cells?
The end cap cells are placed in the design because of the following reasons: To protect the gate of a standard cell placed near the boundary from damage during manufacturing. To avoid the base layer DRC (Nwell and Implant layer) at the boundary. To make the proper alignment with the other block.
What is physical only cells?
if the name of a cell is not present in the current design, it will consider as physical only cells. they do not appear on timing paths reports. they are typically invented for finishing the chip.
Why filler cells are used why we need fill in decreasing order of filler cell size?
why we need fill in decreasing order of filler cell size. Special filler cells are required to obtain the final layout, because placed standard cells can have free spaces between them that need to be filled. These spaces are also multiple of technology pitch and therefore the filler cells widths are chosen accordingly.
What are decap cells in VLSI?
Decap cells are typically poly gate transistors where source and drain are connected to the ground rail, and the gate is connected to the power rail. when there is an instantaneous switching activity the charge required moves from intrinsic and extrinsic local charge reservoirs as oppose to voltage sources.
Why we use tie cells in VLSI?
Tie cells are special purpose standard cells whose output is Constant High or Constant Low. These cells are used to hold (tie) the input of other cells which are required to be connected Constant High (Vdd) or Constant Low (Vss) values.
What are decap cells?
Decap cells are basically a charge storing device made of the capacitors and used to support the instant current requirement in the power delivery network. To support the power delivery network from such sudden power requirements, decap cells are inserted throughout the design.
What is the use of tap cells in VLSI?
Well tap cells (or Tap cells) are used to prevent the latch-up issue in the CMOS design. Well tap cells connect the nwell to VDD and p-substrate to VSS in order to prevent the latch-up issue.
What is decap cells in VLSI?
Why notches are avoided in floorplan?
Avoid notch formation Notch formation is not good because it affects uniform placement density. So we try to maximize the core width and height at the centre of the core area. So we should try to macro placement in such a way that the core area width/height should be maximum in the centre.
What is a DeCAP?
The Dependent Care Assistance Program (DeCAP) is a way to pay for dependent care expenses with before-tax dollars. By enrolling in DeCAP, you not only plan for anticipated dependent care expenses but also reduce your gross income for federal and Social Security tax purposes.