A new local clock generator for globally asynchronous locally synchronous MPSoCs
| Autor: | Ney Calazans, Guilherme Heck, Matheus T. Moreira, Fernando Moraes, Leandro S. Heck |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry Globally asynchronous locally synchronous 020208 electrical & electronic engineering Clock gating 02 engineering and technology Timing closure 020202 computer hardware & architecture Surfaces Coatings and Films Hardware and Architecture Clock domain crossing Control theory Asynchronous communication Signal Processing Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering Electronic engineering Clock generator Digitally controlled oscillator business |
| Zdroj: | Analog Integrated Circuits and Signal Processing. 89:631-640 |
| ISSN: | 1573-1979 0925-1030 |
| DOI: | 10.1007/s10470-016-0827-9 |
| Popis: | The evolution of technology into deep sub-micron domains leads to increasingly complex timing closure problems to design multiprocessor systems. One natural alternative is to resort to the globally asynchronous, locally synchronous paradigm. This work proposes a generic architecture for very low power- and area-overhead local clock generators (LCGs) to drive processors, network-on-chip routers and other intellectual properties (IPs). As one original contribution, the article details the design of a digitally controlled oscillator (DCO) which is the core of the LCG architecture. This DCO was designed using a CMOS 65 nm technology. It produces at least 16 distinct frequencies from 117 MHz to 1 GHz and supports clock gating and glitch-free frequency changes. The DCO design is robust to process, voltage and temperature variations, takes 850.6 µm2 and dissipates up to 197 µW. The article also proposes an LCG controller to improve frequency accuracy for IPs which require more accurate timing. Designed in the same technology, the controller takes 2250 µm2 and consumes 130 µW in typical conditions, or 160 µW, under worst-case conditions. |
| Databáze: | OpenAIRE |
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