Data transfer apparatus

Details Data transfer apparatus Data transfer apparatus

1994-02-14

1995-05-23

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Having particular data buffer or latch

36518901, 365236, 395250, G11C 700

Patent

active

054187443

ABSTRACT:
An external device for sending data can execute write access by the control of a buffer memory management unit and an access control unit only when an empty area is present in a buffer memory area of a memory designated by an area designating unit of the buffer memory management unit. Another external device for receiving data can execute read access by the control of the buffer memory management unit and an access control unit only when data is stored in the buffer memory area. The external devices with different processing speeds can transfer data asynchronously.

REFERENCES:
patent: 4224481 (1980-09-01), Russell
patent: 4891788 (1990-01-01), Kreifels
patent: 4922437 (1990-05-01), Sakata et al.
patent: 5083269 (1992-01-01), Syobatake et al.
patent: 5280584 (1994-01-01), Caesar et al.
patent: 5305253 (1994-04-01), Ward

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