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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 spending a lot of time and occupation, and achieve the effect of saving resources and manufacturing costs

Inactive Publication Date: 2004-11-24
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 and an external memory for extending the address space by inserting a wait state according to a preferred embodiment of the present invention. in figure 1 Among them, it includes a device 110 that extends the address space by inserting a wait state, a bus 140, and an external memory 150, and the device 110 that extends the address space by inserting a wait state is coupled to the external memory 150 through the bus 140. Among them, those who are familiar with this art can easily know that the device 110 that extends the address space by inserting a wait state can be a microcontroller, and the microcontroller can lengthen its clock arbitrarily. The bus 140 may be a serial bus, and the amount of data transfer between the device 110 and the external memory 150 through the bus 140 by inserting a wait state to extend the address space may be a single bit, two bits, a half byte or a byte.

[0045]In the pre...

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PUM

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Abstract

The present invention is device with extended address space via inserting standby state and its operation method. The device includes CPU unit, ROM and memory interface controller. In the device, when the address of the data or program the CPU unit will extract has the last bit in the preset address range, the memory interface controller inserts standby state into the CPU unit until finishing the data or program extraction.

Description

Technical field [0001] The present invention relates to an address space device and its operation method, and more particularly to an address space device and its operation method by inserting a wait state. Background technique [0002] At present, computer information technology is booming, and various cartridge applications have been developed, such as tape cartridges, disk cartridges, optical disc cartridges, storage cartridges, read-only memory cartridges, etc., in which there can be different storage contents. Can store data, programs, sounds and songs, etc. There are two known buses between the 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 an external memory 150 through a parallel bus 540. Among them, the microcontroller 510 includes a central proce...

Claims

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Application Information

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