Apparatus for stretching address space through insertion wait state and operating method thereof

A waiting state and address space technology, applied in the field of address space devices, can solve the problems of time-consuming and occupation, and achieve the effect of saving resources and manufacturing costs

Inactive Publication Date: 2009-09-02
NUVOTON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The known serial address interface device needs to use a script language to interpret the data it captures, and the required script language needs to spend a lot of time to establish in advance
[0006] (2) The known serial address interface device will take up a certain degree of ROM / RAM resources when the interpreter interprets

Method used

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  • Apparatus for stretching address space through insertion wait state and operating method thereof
  • Apparatus for stretching address space through insertion wait state and operating method thereof
  • Apparatus for stretching address space through insertion wait state and operating method thereof

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Embodiment Construction

[0044] Please refer to figure 1 , which is a circuit block diagram of a device for extending address space by inserting wait states and an external memory according to a preferred embodiment of the present invention. exist figure 1 Among them, it includes a device 110 for extending address space by inserting wait states, a bus 140 and an external memory 150 , and the device 110 for extending address space by inserting wait states is coupled to the external memory 150 through the bus 140 . Wherein, as those skilled in the art can easily know, the device 110 for extending the address space by inserting wait states can be a microcontroller, and the microcontroller can lengthen its clock arbitrarily. The bus 140 can be a serial bus, and the amount of data transmitted between the device 110 and the external memory 150 through the bus 140 by inserting a wait state to extend the address space can be a single bit, two bits, a nibble or a byte.

[0045]In this embodiment, the exter...

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PUM

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Abstract

A device for extending address space by inserting waiting states and its operation method, which includes a central processing unit, a read-only memory, and a memory interface controller. This device is used when the address of the data or program to be retrieved by the central processing unit is not in the preset address range, the memory interface controller will insert a wait state in the central processing unit until the data or program is retrieved until.

Description

technical field [0001] The present invention relates to an address space device and its operating method, and in particular to a device and its operating method for extending the address space by inserting a waiting state. Background technique [0002] At present, computer information technology is developing vigorously, and various magazine applications have been developed, such as tape magazines, magnetic disk magazines, optical disk magazines, storage magazines, read-only memory magazines, etc., and there are different storage contents in these magazines. Data, programs, sounds and songs can be stored. There are two types of buses between the known external memory cartridge and the microcontroller, one is a parallel bus, and the other is a serial bus. [0003] Please refer to Figure 5 , which is a circuit block diagram of a known parallel address interface device. This device is a microcontroller 510 and is coupled to the external memory 150 through a parallel bus 540 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/26
Inventor 张生财纪朝文
Owner NUVOTON
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