What are Placement and Routing Blockages in VLSI? There are basically two types of blockages in VLSI,.i.e., Placement Blockages and Routing Blockages. The Placement Blockages are again classified into three types. They are hard blockages, soft blockages and partial blockages.…
What are Floorplan Module Constraints in VLSI? There are basically five different type of module constraint. They are as follows: A module has the attribute None, if it is not preplaced in the core design area. A module can be…
Macro Placement Guidelines After Pin placement, we place macros in the design keeping in mind below rules: One thing I am sure that if you read the below points carefully, you will be able to easily place macros for any…
What are Macros? Macro Cells are the Memory cells. These IPs have been designed by some other Analog design team, which can be used in the floor plan stage of the design. Type of Macros There are following three types…
What is Floorplan? Before hitting this particular topic of Floorplan, let’s take an example of building a house. If we are going to build a house, we first specify the area for different rooms, such as balcony, kitchen, lawn, etc.…
#Clock definition: To define clock, we need following four mandatory informations. 1. Clock source: it can be a port of the design or be a pin of a cell inside the design. (typically, that is part of a clock generation…
puts “Info: PIE VERSION: 2.2.18” ##Power Intent version ##First thing we do is create power supply port for power & ground and then we define nets with the port defined. create_supply_port vdd_ssc_cx create_supply_net vdd_ssc_cx -resolve parallel connect_supply_net vdd_ssc_cx -ports vdd_ssc_cx…
Lets dig more into the .lib file by looking into its contents. Below are the contents of .lib file. We will go through each and every point of this .lib. library(“<timing_library_file_name>”) { ==> library and the name technology (cmos) ; ==> Which…
Below are the contents of LEF in details. The explanation is with ##. VERSION 5.8; ## LEF Version BUSBITCHARS “[]”; ## Bus bit char representation DIVIDERCHAR “/”; ## Divide bit char representation ## Units definition for the numbers defined in this LEF. 4000*number…
VERSION 5.8 ; ## DEF version DIVIDERCHAR “/” ; ##Divider char representation BUSBITCHARS “[]” ; ## Bus bit char representation DESIGN dummy design; ##Design Name (Partition Name) UNITS DISTANCE MICRONS 4000; ##Unit definition ##Before going to next points lets understand the difference between die and…