Kunio Uchiyama

Learn More
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-V<sub>t</sub> transistors. Since high-performance(More)
We develop a heterogeneous multi-core SoC for applications, such as digital TV systems with IP networks (IP-TV) including image recognition and database search. Figure 5.3.1 shows the chip features. This SoC is capable of decoding 1080i audio/video data using a part of SoC (one general-purpose CPU core, video processing unit called VPU5 and sound processing(More)
A 4320MIPS four-core SoC that supports both SMP and AMP for embedded applications is designed in 90nm CMOS. Each processor-core can be operated with a different frequency dynamically including clock stop, while keeping data cache coherency, to maintain maximum processing performance and to reduce average operating power. The 97.6mm<sup>2</sup> die achieves(More)
A heterogeneous multi-core processor (HMCP) architecture, which integrates general purpose processors (CPU) and accelerators (ACC) to achieve high-performance as well as low-power consumption with the support of a parallelizing compiler, was developed. The evaluation was performed using an MP3 audio encoder on a simulator that accurately models the HMCP. It(More)
Functional verification of modern complex processors is a formidable and time consuming task. In spite of substantial manual effort, it is extremely difficult to systematically cover the corner cases of the control logic design, within a short processor design cycle. The SH4 processor is a dual issue superscalar RISC architecture with extensive hardware(More)
A new design methodology focusing on high speed operation and short design time is described for the SH-4 200MHz superscalar microprocessor. Random test generation, logic emulation, and formal verification are applied to logic verification for shortening design time. Delay budgeting, forward/back annotation, and clock design are key features for timing(More)