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Memory access unit and program performing method thereof

A memory access and program execution technology, applied in the field of memory access devices, can solve the problems of consuming random memory space and increasing cost, and achieve the effects of saving space, reducing area and speeding up

Active Publication Date: 2012-11-21
HANGZHOU NATCHIP SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will inevitably consume more random access memory (RAM) space, increasing the cost

Method used

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  • Memory access unit and program performing method thereof
  • Memory access unit and program performing method thereof

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Embodiment Construction

[0033] Such as figure 1 As shown, a memory access device includes a serial nonvolatile memory read module 200 , a serial bus selector 300 and a serial nonvolatile memory controller 500 .

[0034] Wherein, the serial nonvolatile memory read module 200 is connected with the system on chip bus controller 100 through the first system on chip bus 110, and is connected with the serial bus selector 300 through the first serial bus 210; The memory controller 500 is connected with the system-on-chip bus controller 100 through the second system-on-chip bus 120, and is connected with the serial bus selector 300 through the second serial bus 510; the serial bus selector 300 is connected through the third serial bus 310 Connected to the serial non-volatile memory 400 .

[0035] When the serial nonvolatile memory 400 needs to be written, under the control of the CPU 600, the serial bus selector 300 conducts the second serial bus 510 and the third serial bus 310, and the serial nonvolatile ...

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Abstract

The invention discloses a memory access unit and a program performing method thereof. The memory access unit comprises a serial non-volatile memory read module, a serial bus selector and a serial non-volatile memory controller. By the memory access unit, CPU can quickly read a program in the serial non-volatile memory, and does not need to perform in a random access memory (RAM) so as to save thelarge space of the random access memory (RAM) and keep the write function to the serial non-volatile memory. The invention also adopts a high-speed buffer memory so as to quicken speed for reading data by the serial memory, and the whole embedded system can be more smoothly operated.

Description

technical field [0001] The invention relates to the field of embedded integrated circuit design, in particular to a memory access device and a program execution method thereof. Background technique [0002] In an embedded system, the type of memory determines the operation and performance of the entire embedded system, so the choice of memory is particularly important. The memory of an embedded system is generally divided into internal memory and external memory, and the external memory is a non-volatile memory in most cases. There are usually two types of non-volatile memory, one is parallel non-volatile memory, and the other is serial non-volatile memory. Using parallel non-volatile memory, the program in the system can run directly in the parallel non-volatile memory, which greatly saves RAM space, but its disadvantage is that there are many chip pins, and the wiring of the printed circuit board is complicated and the area is large, resulting in high cost. The choice o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/16G11C16/26
Inventor 梁坚沈斌江正标黄宇钊
Owner HANGZHOU NATCHIP SCI & TECH
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