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:
Sep. 11, 2012
Filed:
Apr. 02, 2012
Yasushi Nagai, Fujisawa, JP;
Hiroshi Nakagoe, Yokohama, JP;
Shigeki Taira, Yokohama, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
The DMA controller includes a peripheral device read unit to read states of peripheral devices, a state comparator, a transfer unit, a register, and a peripheral device write unit to write data in the peripheral devices according to the contents in the register when the DMA transfer is executed, an interrupt select unit selects one of plural interrupt signals to determine whether the peripheral device read unit, the state comparator and the transfer unit are at a timing to execute operations. Based on these operations the state comparator determines whether to start the DMA transfer, and the transfer unit executes data transfer between the peripheral devices.