Clock mesh synthesis with gated local trees and activity driven register clustering
US8704577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2012 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jul 22, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/396
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A clock mesh network synthesis method is proposed which enables clock gating on the local sub-trees of the clock mesh network in order to reduce the clock power dissipation. Clock gating is performed with a register clustering strategy that considers both i) the similarity of switching activities between registers in a local area and ii) the timing slack on every local data path of the design area. The method encapsulates the efficient implementation of the gated local trees and activity driven register clustering with timing slack awareness for clock mesh synthesis. With gated local tree and activity driven register clustering, the switching capacitance on the mesh network can be reduced by 22% with limited skew degradation. The method has two synthesis modes as low power mode and high performance mode to serve different design purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.