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A 648 MHz 153.8 mm2 45 nm CMOS SoC integrates eight general-purpose CPUs, four dynamically reconfigurable processors, two 1024-way matrix-processors, peripherals and interfaces. Using core enhancement, DDR3-I/F improvement and clock buffer deactivation, this SoC achieves 37.3 GOPS/W at 1.15 V.
We have developed a platform SoC including eight SuperH processor cores for high performance applications. It achieves 8,640 MIPS at 600 MHz for Dhrystone 2.1. The eight processor cores are divided into two clusters. Each cluster has a snoop controller to maintain cache coherency. The main internal system bus, packet-based split transaction, is 64 bits wide and runs at 300 MHz. As increasing number...
Power efficient SoC design for embedded applications requires several independent power-domains where the power of unused blocks can be turned off. An SoC for mobile phones defines 23 hierarchical power domains but most of the power domains are assigned for peripheral IPs that mainly use low-leakage high-Vt transistors. Since high-performance multiprocessor SoCs use leaky low-Vt transistors for CPU...
We have developed a 97.6 mm2 SoC that includes four SuperHtrade architecture CPUs and a DDR-2 controller with 90-nm CMOS for high-performance embedded applications. These four 600 MHz CPUs are identical and each has a floating point unit, 32/32 KB cache memory, and 152 KB local memory. CPUs totally achieve performance of 4320MIPS. Main on-chip 300 MHz 64-bit bus manages processors access and another...
We have developed an embedded processor that supports asymmetric multiple processor (AQMP), symmetric multiple processor (SMP), and an AMP/SMP hybrid system. It contains four SH-X3 cores used to support cache coherency from that obtained using an SH-X2 core. In this paper, we evaluate the following three techniques to improve the processing performance and reduce the power consumption in parallel...
The authors describe the architecture and design of a second-level cache chip which supports high-speed (160-Mb/s) burst transfer between multilevel caches and a newly proposed cache-consistency protocol. This chip includes a 32-kB data memory as well as a 42-kb tag memory and 21.7 K-gate logic, and it supports a 50-MHz CPU. Performance and design results are presented
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