krutore.blogg.se

At the same time, DDR4 must minimize changes that hinder design migration and adoption of the new industry-standard component.

The DDR4 SDRAM device is an evolutionary device that improves upon the DDR3 SDRAM generation in terms of capacity, performance scalability, power efficiency, as well as system-level reliability, availability and serviceability (RAS). By understanding the underlying motivations of the DDR4 SDRAM device specification, engineers and program managers can better decide whether or not their current and future designs should migrate to support DDR4 SDRAM devices. In an attempt to bridge that knowledge gap, let’s explain some of the purpose of the DDR4 SDRAM device, and frame it in the context of system level trends. Consequently, a knowledge gap exists between the presentation of the technical details in JESD79-4 and understanding the underlying motivations and rationale that led to the standard. However, JESD79-4 was not intended as a tutorial on system design or to provide explanations as to if and how specific system designs should be migrated to utilize DDR4 SDRAM devices, so it’s left to the readers to imagine the possible advantages of the technology at the system level. When JEDEC Solid State Technology Association announced the initial publication of its widely anticipated DDR4 SDRAM standard, JESD79-4, the voluminous document described the DDR4 SDRAM device in exacting detail.