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. 07, 1999
Filed:
Mar. 18, 1997
Yoshiaki Homitsu, Hitachi, JP;
Hiroshi Ichige, Hitachi, JP;
Shigeo Kuboki, Hitachinaka, JP;
Yoshiaki Ajima, Hitachi, JP;
Yoshinori Atsuwata, Hitachi, JP;
Isao Saitoh, Hitachi, JP;
Satoko Iwama, Hitachiota, JP;
Takamasa Fujinaga, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Engineering Co., Ltd, Ibaraki, JP;
Hitachi Haramachi Electronics Co., Ltd., Ibaraki, JP;
Abstract
The communication control device allows a plurality of data items to be transferred to and from external devices, such as a CPU and a memory, via an external bus having a different data bus width in DMA (direct memory access) transfer mode. DMA transfer is controlled by the DMA controller provided in the communication control device. The DMA controller produces a signal indicating that a plurality of data items are continual.