Showing posts with label Physical Design. Show all posts
Showing posts with label Physical Design. Show all posts

23 March 2015

Physical design setup

Libraries & Incoming Files

ØTypical set of libraries received from the library vendor:
§LEF: Abstract Physical View
§LIB: Timing view
§GDS: Full layout view
§Verilog stub files/models etc.
ØRules files received from Foundry
§RC Extraction
§Noise characterization files
§Design rule documents for the corresponding technology
§DRC/ Antenna, LVS deck for the corresponding verification tool, 


Incoming Files/ Information

ØSet of files/ info to be received from the Front-end design group
§Netlist
§Timing Constraints file - SDC constraints
§Data Flow diagram, expected aspect ratio, die size
§Pin-pad table - as Excel sheet/ text table (including power pads)
§Clock constraints - max skew, max and min insertion delay, no. of clock domains, clock start points (whether port level or internally generated)
§Reports - timing report, power estimation report, area report.

22 March 2015

Overview of Physical Design Flow

Physical Design Flow

Physical Design Flow
1. Partitioning: A chip may contain several million transistors. Due to the limitations of memory space and computation power available it may not be possible to layout the entire chip (or generically speaking any large circuit) in the same step.