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:
Apr. 30, 2002
Filed:
Apr. 26, 1999
Stanley A. Hronik, Sunnyvale, CA (US);
Mark W. Baumann, Campbell, CA (US);
Integrated Device Technology, Inc., Santa Clara, CA (US);
Abstract
A quad data rate RAM ( ) in accordance with the invention is a burst synchronous RAM with separate data buses (Data-In, Data-Out) for read and write data. Data can be transferred on both buses and on both the rising and the falling edge of the clock (CLK). Operating at the maximum throughput, four data items are transferred per clock cycle. In one embodiment, data is written to or read from the RAM in bursts of four data items. The RAM includes four independent internal RAM blocks ( ). in a write burst, (i) a write address, (ii) control signal(s), and (iii) four write data items are sequentially presented to the respective four internal RAM blocks at the respective four clock edges of two consecutive clock cycles. A read burst is carried out similar to a write burst except that there is a one clock cycle latency between the four read data items and the burst address.