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:
Nov. 30, 2010
Filed:
Jul. 27, 2006
Tomokazu Okada, Kyoto, JP;
Takashi Kira, Kyoto, JP;
Tomokazu Okada, Kyoto, JP;
Takashi Kira, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
In a RAM control device, an arbiter circuit is means for generating BUSYand BUSYof exclusive logic with CLKand CLKso as to give a right to access RAMto a host which has transmitted the first access clock and requesting a one-shot circuit to generate RAMCLK for deciding the timing to access the RAM. The one-shot circuit is means for generating one pulse of RAMCLK with CLKRQ from the arbiter circuit and transmitting it to the RAM. This configuration suppresses increase of the device size and cost and enables appropriate control of access to the RAM according to the access clocks of two systems inputted asynchronously.