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:
May. 11, 2004
Filed:
May. 06, 2002
Ryohei Higuchi, Tokyo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
DMA transfer request signals corresponding to respective channels are received and held in respective transfer request holding circuits. DMA transfers are assigned to the DMA transfer request signals respectively in a channel transfer request arbitrating circuit according to priorities set in advance for the DMA transfer request signals, and the DMA transfers for the DMA transfer request signals are performed in the order of lower priority. Also, a transfer waiting time period from the reception of one DMA transfer request signal to the assignment of the DMA transfer is measured in a transfer waiting time counter for each DMA transfer request signal, and the transfer waiting times are, for example, stored in a storing circuit and are selectively read out.