[특허]Universal protocol programmable communications interface

Universal protocol programmable communications interface 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-003/14
출원번호	US-0993702 (1992-12-21)
발명자 / 주소	Evan Shabtai (Saratoga CA)
출원인 / 주소	ABB Power T&D Company, Inc. (Blue Bell PA 02)
인용정보	피인용 횟수 : 85 인용 특허 : 0

초록 ▼

A general purpose programmable communications interface designed to support a wide variety of serial synchronous and asynchronous communication protocols. A universal protocol communications (UPC) interface is designed to operate on a VME bus in conjunction with a CPU board which contains the application software that utilizes the communications capabilities of the UPC interface. Per channel DMA is available on input/output lines of the interface together with bit level control for message processing so that a variety of bit oriented communications protocols may be supported by simple reconfiguration of the receiver/transmitter of the programmable UPC interface. In a preferred embodiment, a dynamically variable bit length shift register is used to organize the received and transmitted data into serial packets of the appropriate size on a per channel basis independent of the actual width of the shift register. Reconfiguration for different protocols is accomplished by simply changing a bit count value stored in a bit counter which counts the number of serial data bits received or transmitted in each data word by the dynamically variable bit length shift registers of the transmit and receive circuitry.

대표청구항 ▼

A universal protocol communications interface controlled by a host processor so as to provide serial synchronous and asynchronous data communication over a plurality of data communications channels between data communications devices having the same or different bit oriented data communications protocol as said host processor, comprising: a host interface for selectively providing read and write access to said host processor; and a data communications controller comprising: a data buffer connected to said host processor via said host interface; a memory for storing data for passage to/from said data communications devices; a DMA device for providing addresses to data stored in said memory; a data bus for providing data communication among said buffer, said memory and said DMA device; a controller for arbitrating among different requests for access to said data bus; and at least one programmable synchronous/asynchronous receiver/transmitter connected to said data bus so as to provide data communications between said data bus and a plurality of data communications devices over said plurality of data communications channels, each programmable synchronous/asynchronous receiver/transmitter having a programmable bit protocol length for data packets transmitted or received thereby, said bit protocol length being programmed independently for each of said plurality of data communications channels so as to provide serial data communications over each data communications channel in data packets having the bit protocol length of the data communications device connected thereto.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Universal protocol programmable communications interface 원문보기

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Universal protocol programmable communications interface 원문보기

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이 특허를 인용한 특허 (85)

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