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Design and Implementation of a Configurable Heterogeneous Multicore SoC With Nine CPUs and Two Matrix Processors

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18 Author(s)
Kondo, H. ; Renesas Technol. Corp., Hyogo ; Nakajima, M. ; Masui, N. ; Otani, S.
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A multicore system-on-chip (SoC) has been developed for various applications (recognition, inference, measurement, control, and security) that require high-performance processing and low power consumption. This SoC integrates three types of synthesizable processors: eight CPUs (M32R), two multi-bank matrix processors (MBMX), and a controller (M32C). These processors operate at 1 GHz, 500 MHz, and 500 MHz, respectively. These three types of processors are interconnected on this chip with a high-bandwidth multi-layer system bus. The eight CPUs are connected to a common pipelined bus using a cache coherence mechanism. Additionally, a 512-kB L2 cache memory is shared by the eight CPUs to reduce internal bus traffic. A multi-bank matrix processor with 2-read/1-write calculation and background I/O operation has been adopted. The 1-GHz CPU is realized using a delay management network which consists of delay monitors that can be applied for any kind of application or process technology. Our configurable heterogeneous architecture with nine CPUs and two matrix processors reduces power consumption by 45%.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:43 ,  Issue: 4 )

Date of Publication:

April 2008

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