Communication interface for independently generating frame information that is subsequently stored in host memory and sent out to transmitting fifo by dma
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United States of America Patent
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-
Dec 29, 1992
Grant Date -
N/A
app pub date -
Feb 21, 1989
filing date -
Feb 23, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communication system including a communication control unit connected through a communication line to a different system, a high-ranking processor for control of the communication control unit, and a common memory used for transfer of data between the high-ranking processor and the communication control unit. The communication control unit includes a direct memory access controller and a line controller interconnected via a transmission-only path and a reception-only path. The communication control unit autonomously generates an information frame and stores it in the common memory. The direct memory access controller then reads the information frame and transfers it to the line controller via the transmission-only path in order to transmit the information frame to the different system.
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