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:
Dec. 26, 2000
Filed:
Jul. 01, 1998
Masahiro Ishii, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A SCSI system including a SCSI controller, daisy-chained SCSI connectors to which SCSI devices are to be connected, and a SCSI cable interconnecting the SCSI connectors. The SCSI controller includes a circuit for controlling a REQ signal that is allowed to flow through two lines in the SCSI cable, and for controlling an ACK signal that is also allowed to flow through another two lines in the SCSI cable. One of the two lines for conveying the REQ signal alternately connects an unused pin and a REC pin of two successive SCSI connectors, and the other of the two lines alternately connects a REQ pin and an unused pin of the two successive controllers. The two lines for conveying the ACK signal interconnect the SCSI connectors in a similar manner. This enables the load capacitance of the REQ and ACK control signal lines to be reduced, thereby ensuring normal operation of up to seven high speed SCSI devices, that is, the maximum number of devices connectable to the SCSI system.