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Formal reset recovery slack calculation at the register transfer level

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4 Author(s)
Chih-Neng Chung ; GIEE National Taiwan University Taipei, Taiwan ; Chia-Wei Chang ; Kai-Hui Chang ; Sy-Yen Kuo

Reset is one of the most important signals in many designs. Since reset is typically not timing critical, it is handled at late physical design stages. However, the large fanout of reset and the lack of routing resources at these stages can create variant delays on different targets of the reset signal, creating reset recovery problems. Traditional approaches address this problem using physical design methods such as buffer insertion or rerouting. However, these methods may invalidate previous optimization efforts, making timing closure difficult. In this work we propose a formal method to calculate reset recovery slacks for registers at the register transfer level. Designers and physical design tools can then utilize this information throughout the design flow to reduce reset problems at later design stages.

Published in:

2011 Design, Automation & Test in Europe

Date of Conference:

14-18 March 2011