#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…
The second part is to understand that, in these input/output pins what are in input categories and what are in output categories like below. Along with this, it defines the pins which helps to transfer the data like buffer named…
Before going into all the physical design inputs in details, I want to make you understand the block level design and Full Chip Level design (FC). Mostly, partition owners are assigned with the block-level design to work on one partition…
What is routing? Creating physical connections to all the logical connections present in the design with the help of metal layers is known as routing. What are the types of routing? What are the pre routing checks? What are the…
What are the CTS inputs? What does the CTS Spec File contain? 1. Inverters or buffers to be defined which will be used to balance the clock tree. 2. CTS Exceptions (End points of clock tree). 3. Skew group information.…
What is placement? Placing of standard cells in the design is known as placement. What are the pre placement sanity checks? What are the stages of placement? What are the objectives/quality checks of placement? What is congestion? If the number…