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Date: 12-03-17

Deep node VLSI: Tool automatically adds interconnect pipelines to close timing

In deep node VLSI design using FinFETs, the transistors are getting faster, whereas the interconnect signal gets comparatively slower, that's why on-chip interconnect is topping the timing closure issues, causing delay in total SOC turnaround design time. To solve this issue in early-stage, the VLSI interconnect technology IP expert Arteris announced PIANO 2.0, an automated interconnect timing closure technology.

Based on the VLSI designer experience with FlexNoC, Physical Arteris  has built PIANO 2.0 to automate interconnect timing closure for both cache coherent and non-coherent subsystems. At FinFET based deep nodes starting from 28nm to 10nm /7 nm, VLSI engineers solve the issues by manually inserting  pipeline stages in the chip netlist through an engineering change order (ECO) process. This new technology introduces the concept of physical interconnect distance to customers using Arteris FlexNoC and Ncore interconnect products.

By using the data such as length of individual interconnect links and traces and process and performance targets, this tool calculates and automatically adds interconnect pipelines to close timing.  PIANO validate this timing closure scheme with the physical synthesis capabilities of the Synopsys or Cadence EDA tools.

The advantages of PIANO 2.0 includes, interconnect timing can be closed in as little as 24 hours, reduces interconnect area by 10-15% compared to manual pipeline insertion methodologies. There is also saving in power consumption due to lesser pipeline logic and use of fewer low voltage threshold (LVT) cells.

By using this tool, the place and route tools get a better starting point by having the date of pipeline stage locations.

PIANO 2.0 generates meta-floorplan from an IP list to provide timing closure guidance during the SoC architectural development phase, Input and output of production floorplans in LEF/DEF and TCL formats.

Automatic pipeline insertion with advanced features such as edit timing closure parameters to optimize individual timing paths, Automatically account for crossing between multiple frequency and voltage domains, Automatically generate timing closure analysis reports.

PIANO 2.0 is integrated with Synopsys’ Design Compiler Graphical and IC Compiler II and Cadence’s Genus and Innovus physical synthesis tool chains.

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