A method to perform DMA data transfer in a single-chip microcomputer control system
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Abstract:
In order to transfer data with great speed in a singlechip microcomputer control system,the DMA circuit is designed with an interface circuit and a DMA controller.By extending the memory,the data can be transferred by DMA with little share in the singlechip microcomputer's resources.This method can be used to design the interface of a floppy disk driver or a highspeed sampling circuit.Keywords:
Micro computer
Interface (matter)
Floppy disk
Direct memory access
Data sampling
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The 51 serial single-chip microcomputer is obviously inadequate capacity in data transfer.By extending the memory,the data can be transferred by using the interface to expand the circuit and the DMA controller with little share in the single-chip mircrocmputer's resources.This method can be used to design the interface of the floppy disk driver or the high-speed sampling circuit.
Micro computer
Interface (matter)
Floppy disk
Data sampling
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Computer-system architecture enables system host central processor (CP) to make high-speed, direct-memory-access (DMA) data transfers without cost and complexity of adding dedicated DMA controller. New system, CCP used as DMA controller, obviating need for dedicated DMA controller; yet maximum transfer rates equivalent to those obtained with dedicated DMA controller. Useful wherever dedicated DMA controller desired because of required data-transfer rates.
Direct memory access
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