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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The CPU’s integrated memory controller can then work with either.
Another benefit is its prefetch bufferwhich is 8-burst-deep. This is because DDR3 memory modules transfer data on a bus that is 64 data bits wide, specificationn since a byte comprises 8 bits, this equates to 8 bytes of data per transfer.
Bandwidth is calculated by taking transfers per second and multiplying by eight.
Not only are they keyed differently, but DDR2 has rounded notches on the side and the DDR3 modules have square notches on the side. Some manufacturers also round to a certain precision or round up instead. There is some improvement because DDR3 generally uses more recent manufacturing processes, but this is not directly caused by sspecification change to DDR3. In addition to bandwidth designations e.
AR# MIG Virtex-6 DDR2/DDR3 JEDEC Specification – Additive Latency
High-performance graphics was an initial driver of such bandwidth requirements, where high bandwidth data transfer between framebuffers is required. It is typically used during the power-on self-test for automatic configuration of memory modules.
All articles epecification unsourced statements Articles with unsourced statements from March Retrieved 12 October This advantage is an enabling technology in DDR3’s transfer speed. Devices that require DDR3L, which operate at 1. Under this convention PC is listed as PC For the graphics memory, see GDDR3. Retrieved 12 December Views Read Edit View history.
The actual DRAM arrays that store the data are similar to earlier types, with similar performance.
Retrieved 19 March From Wikipedia, the free encyclopedia. This reduction comes from the difference in supply voltages: As with earlier memory generations, faster DDR3 memory became available after the release of the initial versions. Dynamic random-access memory DRAM.
Retrieved from ” https: DDR3 modules are often incorrectly labeled with the prefix PC instead of PC3for marketing reasons, followed by the data-rate. DDRDand capacity variants, modules can be one of the following:. Memory standards on the way”.
It is also misleading because various memory timings are given in units of clock cycles, which are half the speed of data transfers. For the video game, see Dance Dance Revolution 3rdMix. DDR3 memory utilises serial presence detect. This page was last edited on 17 Novemberat 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.
Of these non-standard specifications, the highest reported speed reached was equivalent to DDR, as of May CL — CAS Latency clock cyclesbetween sending a column address to the memory and the beginning of the data in response. The DDR3L jeddec is 1.