This section of the MIG Design Assistant focuses on the Additive Latency, defined by the JEDEC Spec,as it applies to the MIG Virtex-6 DDR3 design. NOTE: This. JEDEC. STANDARD. Double Data Rate (DDR). SDRAM Specification The information included in JEDEC standards and publications represents a sound. Micron Technology, Inc. All rights reserved. Products and specifications discussed herein are subject to change by Micron without notice.
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High-performance graphics was an initial driver of such bandwidth requirements, where high bandwidth data transfer between framebuffers is required.
DDR3 SDRAM – Wikipedia
Some manufacturers also round to a certain precision or round up instead. Retrieved 12 December This page was last edited on 17 Novemberat Of these non-standard specifications, the highest reported speed reached was equivalent to DDR, as of May Because the hertz is a measure of cycles per second, and no signal cycles more often than every other transfer, describing the transfer rate in units of MHz is technically incorrect, although very common.
Memory standards on the way”.
The DDR3L standard is 1. As with earlier memory generations, faster DDR3 memory became available after the release of the initial versions.
AR# MIG Virtex-6 DDR2/DDR3 JEDEC Specification – Additive Latency
Devices that require DDR3L, which operate at 1. Retrieved 12 October It is typically used during the power-on self-test for automatic configuration of memory modules. Archived from the original on Under this convention PC is listed as PC Dynamic random-access memory DRAM. In other projects Wikimedia Commons.
In addition to bandwidth designations e. Views Read Edit View history. Bandwidth is specificatipn by taking transfers per second and multiplying by eight.
Retrieved from ” https: This article is about the computer main memory. All articles with unsourced statements Articles with unsourced statements from March DDR3 modules are often incorrectly labeled with the prefix PC instead of PC3for marketing reasons, followed by the data-rate. Archived from the original on April 13, It specificaion also misleading because various memory timings are given in units of clock cycles, which are half the speed of data transfers.
DDRDand capacity variants, modules can be one of the following:. The Core i7 supports only DDR3.
This is because DDR3 memory modules transfer data on a bus that is 64 data bits wide, and since a byte comprises 8 bits, this equates to 8 bytes of data per transfer. DDR3 memory utilises serial presence detect. Not only are they keyed differently, but DDR2 has rounded notches on the side and the DDR3 modules have square notches on the side.
For the video game, see Dance Dance Revolution 3rdMix. Retrieved 19 March The CPU’s integrated memory controller can then work with either. CL — CAS Latency clock cyclesbetween sending a column address to the memory and the beginning of the data in response. DDR3 prototypes were announced in early This advantage is an enabling technology in DDR3’s transfer speed. There is some improvement because DDR3 generally uses more recent manufacturing processes, but this is not directly caused by the change to DDR3.
Another benefit is its prefetch bufferwhich is 8-burst-deep. This reduction comes from the difference in supply voltages: Archived from the original on December 19,