Editing Dynamic random-access memory (section)

==={{Anchor|PSRAM}}Pseudostatic RAM===
[[File:Olivetti JP90 - Toshiba TC518129CFWL-80 on controller-8514.jpg|thumb|1 Mbit high speed [[CMOS]] pseudostatic RAM, made by [[Toshiba]] ]]
Pseudostatic RAM (PSRAM or PSDRAM) is dynamic RAM with built-in refresh and address-control circuitry to make it behave similarly to static RAM (SRAM). It combines the high density of DRAM with the ease of use of true SRAM. PSRAM is used in the Apple iPhone and other embedded systems such as XFlar Platform.<ref>{{cite news |first=Patrick |last=Mannion |title=Under the Hood — Update: Apple iPhone 3G exposed |newspaper=EETimes |date=2008-07-12 |url=http://www.eetimes.com/showArticle.jhtml?articleID=209000014#selection-1371.0-1383.10 |archive-url=https://archive.today/20130122004240/http://www.eetimes.com/showArticle.jhtml?articleID=209000014#selection-1371.0-1383.10 |url-status=dead |archive-date=2013-01-22 }}</ref>

Some DRAM components have a ''self-refresh mode''. While this involves much of the same logic that is needed for pseudo-static operation, this mode is often equivalent to a standby mode. It is provided primarily to allow a system to suspend operation of its DRAM controller to save power without losing data stored in DRAM, rather than to allow operation without a separate DRAM controller as is in the case of mentioned PSRAMs.

An [[EDRAM|embedded]] variant of PSRAM was sold by MoSys under the name [[1T-SRAM]]. It is a set of small DRAM banks with an SRAM cache in front to make it behave much like a true SRAM. It is used in [[Nintendo]] [[GameCube]] and [[Wii]] video game consoles.

[[Cypress Semiconductor]]'s HyperRAM<ref>{{cite web |url=https://www.cypress.com/products/hyperram-octal-xspi-ram-memory|title=psRAM(HyperRAM) |publisher= Cypress semiconductor}}</ref> is a type of PSRAM supporting a [[JEDEC memory standards|JEDEC]]-compliant 8-pin HyperBus<ref>{{cite web |url=https://www.cypress.com/products/hyperbus-memory|title=Hyperbus |publisher= Cypress semiconductor}}</ref> or Octal xSPI interface.