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CD control chip having common storage access assembly and storage access method thereof

A shared memory and control chip technology, applied in optical recording/reproduction, information storage, recording information storage, etc., can solve the problem of system single chip

Inactive Publication Date: 2005-12-28
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The present invention provides a memory access device and method that can reduce the use of memory pins, and solve the problem of system single chip

Method used

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  • CD control chip having common storage access assembly and storage access method thereof
  • CD control chip having common storage access assembly and storage access method thereof
  • CD control chip having common storage access assembly and storage access method thereof

Examples

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Embodiment Construction

[0029] A preferred embodiment will be listed below to illustrate the present invention, but those skilled in the art know that this is only an example rather than limiting the invention itself. The preferred embodiment of the present invention is described in detail as follows.

[0030] Figure 4 The memory address and data bus sharing device 400 of the preferred embodiment of the present invention includes: a synchronous dynamic random access memory 410, which is used to store a large amount of data generated during system operation and a buffer for maintaining playback fluency under high-speed processing; A flash memory 420, storing programs, firmware, and user preset data; a servo controller 440, used to control the motor to read data in the optical storage medium; a high-end microprocessor 450, used to execute the program ; A video and audio decompression unit 460, used to process video and audio signals; and a memory interface 430, used to link the operations between the ...

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Abstract

An optical disc control chip and its memory access method for a common memory access device include at least one synchronous dynamic random access memory, which is used to temporarily store a large amount of data required by the processor and buffer during high-speed processing. At least one flash memory is used to store programs to be executed by the processor, firmware, and user default values; wherein the address and data pins of the synchronous dynamic random access memory and the flash memory share the same bus, and the The synchronous dynamic random access memory and the flash memory will not be accessed at the same time; a memory interface is used to connect the address and data bus respectively shared by the synchronous dynamic random access memory and the flash memory; wherein the memory interface also includes There is an arbiter, which determines which access request needs to be executed first according to the priority order of access instructions, and at the same time enables the selection pin of the memory to be accessed, and only one memory selection pin will be enabled at a time .

Description

(1) Technical field [0001] The invention relates to an optical disc control chip with a shared memory access device, in particular to a technique for sharing synchronous dynamic random access memory and flash memory in the optical disc control chip. (2) Background technology [0002] With the increasing demand for consumer multimedia electronic products, in order to enhance product competitiveness, it has become a trend to integrate integrated circuit (Integrated Circuit, IC) system-on-chip (SoC). Due to the integration of components, SoC-based ICs can achieve better performance in terms of power consumption, heat dissipation, and signal transmission. In addition, since the concept of SoC lies in how to put more components into the same IC, the components in the IC must be integrated or reduced in size to achieve the purpose of SoC, and with the integration of components, accompanying What comes is that the use of components and substrates is reduced. At the same time, due ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/005G11B20/10
Inventor 叶丁坤
Owner VIA TECH INC