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Method, system and apparatus to realize data download

A data downloading and data technology, which is applied in the direction of program control device, program loading/starting, memory address/allocation/relocation, etc., can solve the problems of slow downloading speed and long waiting time, and achieve the goal of increasing speed and shortening waiting time Effect

Inactive Publication Date: 2008-09-17
VIMICRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the JTAG interface is a serial interface, so the download speed is slower and the waiting time is longer

Method used

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  • Method, system and apparatus to realize data download
  • Method, system and apparatus to realize data download
  • Method, system and apparatus to realize data download

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0049]The basic idea of ​​the present invention is to set a multiplexer between the parallel interface of the coprocessor, the internal CPU and the memory. When downloading data, the main control processor controls the multiplexer inside the coprocessor through the parallel interface to place the parallel interface and the memory connected to the position; the main control processor downloads the program and initialization data and other data to be downloaded to the memory through the parallel interface ; After the download is completed, the main control processor controls the internal multiplexer of the coprocessor to be placed in the position where the internal CPU communicates with the memory through the parallel interface, and the internal CPU c...

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Abstract

This invention discloses one method to realize data download, which comprises the following steps: presetting multi-path selector between parallel interface, inner CPU and memory; a, main control processor puts the selector through parallel interface control with memory machine; b, main control processor downloads data through parallel interface to memory; after downloading data, the main control processor puts the selector into inner CPU and memory through parallel interface control processor.

Description

technical field [0001] The invention relates to data download technology, in particular to a method, system and device for realizing data download. Background technique [0002] Some current chips, such as multimedia processing chips, generally have a central processing unit (CPU) inside to manage and control various functions of the chip, and these chips are generally used as coprocessors, and there is a main control processor outside, such as The baseband processor and the like control the chip. In order to facilitate correspondence and distinction with the main control processor, the chip used as a coprocessor will be referred to as a coprocessor for short below. [0003] During the specific application, at first, the main control processor downloads the program and initialization data and other data to be downloaded into the internal memory of the coprocessor through the boundary scan port (JTAG) of the internal CPU of the coprocessor; The internal CPU of the processor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/445G06F12/02
Inventor 戴春泉董欣
Owner VIMICRO CORP