Pre-charging data access control device and method thereof

Abstract

The invention provides a pre-charging data access control device and a method thereof. The control device comprises: an access initiating unit which is used for generating an access request that reads data from or write data into a memory and at least comprises a self-Master ID field and a read-write access marker field; a bus which is used for transmitting the access request and corresponding data; a storing controller which is used for judging the read-write access marker field when the value of the Master ID field in the access request accords with a prearranged value, and if the access request is a reading request, the pre-charging is not carried out, and if the access request is a writing request, the pre-charging is carried out when the writing request is finished; and a memory which is used for storing data corresponding to the access request. The embodiment of the invention has the beneficial effects that with the improvement scheme adopted, the access delay of write access is effectively lowered without influencing the efficiency of the read request and the working efficiency of the whole system is improved.

Description

technical field [0001] The present invention relates to data access technology, in particular to a precharge data access control device and method. Background technique [0002] In the multimedia system-on-a-chip (SOC, System on a Chip) technology, it mainly includes CPU, hardware video decoder, bus controller and storage controller. The CPU is responsible for executing operating system instructions and scheduling tasks, and the hardware decoder is responsible for For the actual video decoding, the storage controller is responsible for storing the source data, intermediate data and result data in the video decoding process. like figure 1 Shown is a block diagram of a common hardware decoding system. The hardware video decoder accesses the memory through the bus, reads the source data of the video image, and rewrites the intermediate data or / and the result data back to the memory after internal operations. , for image post-processing or display output, etc. The bus control...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a precharge data access control device and method, which is used to solve the problem of low working efficiency of the memory due to the page conflict of access in the prior art, and the simple use of precharge technology results in an increase of the number of read request pages. The access time in the hit situation makes the system as a whole not improve the performance by reducing the delay, but increases the defect of hardware complexity

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