Optimized design method for full-custom microprocessors

Kimiyoshi Usami, Jun Iwamura

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


An effective design method for VLSI-based microprocessors is proposed. According to the method, the chip is divided into three categories; control logics, datapaths and macrocells at the very early stage. The control logics are automatically designed by a logic synthesis and an automatic placement & routing. For the datapaths and the macrocells, logic and layout are designed manually. By combining the design method with "design-pipelining", a 32-bit microprocessor including 460K transistors was designed in a year without sacrificing the chip size and the performance. An impact on design effort is also discussed.

Original languageEnglish
Article number5726257
Pages (from-to)19.5.1-19.5.5
JournalProceedings of the Custom Integrated Circuits Conference
Publication statusPublished - 1989 Dec 1
Externally publishedYes
Event11th IEEE 1989 Custom Integrated Circuits Conference, CICC'89 - San Diego, CA, United States
Duration: 1989 May 151989 May 18

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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