The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 1997
Filed:
Oct. 16, 1996
Kazuhiro Umekita, Tsuchiura, JP;
Masatsugu Kametani, Tsuchiura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A communication control apparatus includes a pair of communication controllers each having a dual port RAM (DPR) with an interruption request generating function. A master processor system is connected to one port of the DPR in one of the communication controllers. A slave processor system is connected to one port of the DPR in the other communication controller. A channel controller is connected to each of the other port of the DPR in one communication controller and to the other port of the other communication controller, respectively. Both of the channel controllers are coupled by a communication channel. Both of the communication controllers mutually transfer data on the communication channel so that the contents of the DPR in the pair of communication controllers always coincide, so that the master processor system and the slave processor system operate as if they were connected by one DPR.