System for exchanging data through data memory area of common me

Details System for exchanging data through data memory area of common me System for exchanging data through data memory area of common me

1997-04-14

2000-10-03

Lim, Krisna

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710200, 710240, G06F 1300, G06F 1328, G06F 1214

Patent

active

061286893

ABSTRACT:
A device for use when exchanging data between two processor units comprises a first processor unit, which is arranged to selectively operate in one of a synchronous mode and an asynchronous mode when exchanging data with a second processor unit through a data memory area in a common memory. Preferably, the access to the data memory area is controlled by a state machine in the first processor unit. The state machine has a first state in which the data memory area is free, a second and a third state in which the data memory area is reserved for the first processor unit and the second processor unit, respectively, and a fourth and a fifth state, in which the data memory area is accessed by the first processor unit and the second processor unit, respectively. The device is advantageously used in a fieldbus system.

REFERENCES:
patent: 4615017 (1986-09-01), Finlay et al.
patent: 4639861 (1987-01-01), Appiano et al.
patent: 4823304 (1989-04-01), Frantz
patent: 5293491 (1994-03-01), Leung et al.
patent: 5329630 (1994-07-01), Baldwin
patent: 5339395 (1994-08-01), Pickett et al.
patent: 5410655 (1995-04-01), Greenfield et al.
patent: 5829052 (1998-10-01), Pawlowski et al.
"Parallel and Distributed Computation," by Dimitri P. Bertsekas and John N. Tsitsiklis, Prentice Hall, 1989, pp. 88-91, 95-96.
"Mastering Windows NT Programming,"

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