DRAM Memory Controller •Frontend –Request/Response Buffers –Memory mapping –Arbiter •Controller Backend –Command Generator •Timing to be obeyed Slide Source: S. Rixner

SDRAM Controller Subsystem Block Diagram 12.3. SDRAM Controller Memory Options 12.4. SDRAM Controller Subsystem Interfaces 12.5. Memory Controller Architecture 12.6. …

Die-stacked DRAM (3D-DRAM) • Die-stacked DRAM: • Top layers store data • Bottom logic layer stores the various control, access, and interface circuits • Magic: Stacked means high density, …

DRAM Memory Controllers Reference: “Memory Systems: Cache, DRAM, Disk Bruce Jacob, Spencer Ng, & David Wang Today’s material & any uncredited diagram came from Chapter 13 …

Understanding the DRAM Timing Diagram. The most difficult aspect of working with DRAM devices is resolving the timing requirements. DRAMs are generally asynchronous, responding …

Contemporary DRAM Architectures 1/5 • Many new DRAM architectures have been introduced to improve memory sub-system performance • Goals – Improved bandwidth – Reduced latency

DRAM Internal Block Diagram. This DRAM has four data I/O pins and four internal planes, so no bank select bits. (Modern, larger capacity DRAMs have multiple such structures on their die …

A DRAM is actually composed out of several independent blocks, each of which is divided into 4 quadrants. The diagram shows 512 Storage Cells tied to each Sense Amp (256 above and …

DRAM TUTORIAL ISCA 2002 Bruce Jacob David Wang University of Maryland first off -- what is DRAM? an array of storage elements (capacitor-transistor pairs) “DRAM” is an acronym …

Basic building blocks such as DRAM storage cells, DRAM array structure, volt-age sense amplifi ers, decoders, control logic blocks, data I/O structures, and packaging considerations are …