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Semiconductor integrated circuit

A technology of integrated circuits and semiconductors, which is applied in the fields of electrical digital data processing, instruments, and various digital computer combinations. It can solve problems that cannot be completely solved, and achieve the effect of easy management.

Inactive Publication Date: 2007-07-04
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, it can also be considered that for programs that cannot be trusted, software cannot completely solve the problem.

Method used

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  • Semiconductor integrated circuit
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Examples

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Embodiment Construction

[0038] Fig. 1 shows a microcomputer as an example of the semiconductor integrated circuit of the present invention.

[0039] The microcomputer 10 shown in FIG. 1 is not particularly limited. It includes 4 processors PE1 to PE4, 3 IP modules IP1 to IP3, a bus bridge BUSB, a processor management unit PMU, a bus state controller BSC, and an ID gate. IDG1 to IDG4, the inter-processor bus 100, the external bus 101, and the processor ID signal line 102 are formed on a semiconductor substrate such as a single crystal silicon substrate.

[0040] The processors PE1 to PE4 perform arithmetic processing in accordance with a preset program. The processors PE1 to PE4 are not particularly limited, but they have the same structure. The processor PE1 includes a central processing unit CPU, a local memory LMEM, a direct memory access controller DMAC, and a bus interface BIF. The central processing unit CPU performs calculations in accordance with instructions. The local memory LMEM is mainly used ...

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PUM

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Abstract

The inbention provides a semiconductor integrated circuit. When the semiconductor integrated circuit is constituted to include a plurality of processors and a module which can be accessed by the processors, there is provided a processor managing unit (PMU) capable of changing a utilizing permission of the other processors or the module which is given to the processor into the other processors. Consequently, it is possible to ease a management of the processors and the module. The processor managing unit can be disposed between a bus and a bus controller. Moreover, the processor managing unit can be distributed and disposed between the bus and the processors and between the bus and the module.

Description

Technical field [0001] The present invention relates to a semiconductor integrated circuit, and further relates to a technology for easily managing a processor contained therein and an IP (design asset) module that can be accessed by the processor. Background technique [0002] In recent years, with the popularization of information processing equipment and the demand for higher performance and higher functionality, multiple processors and IP modules have gradually been mounted on a single semiconductor chip. In these chips, by distributing processing to multiple processors and IP modules, high performance can be obtained at low frequencies. Due to advances in semiconductor manufacturing technology, the scale of circuits that can be implemented with semiconductor chips has expanded, and semiconductor chips that effectively use multiple processors and IP modules have emerged. In these semiconductor chips, especially asymmetric multi-stage processor chips equipped with multiple dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F15/16
CPCG06F12/1441
Inventor 田中博志
Owner HITACHI LTD