Designware enhanced universal ddr memory controller. Micron insight brings you stories about how technology transforms information to enrich lives. Rtl design of ddr sdram controller using verilog priyanka bibay dept. The 32bit wide user interface basically accepts two commands, read or write. Xilinx, xapp709 ddr sdram controller using virtex4 fpga. Double data rate ddr sdram controller lattice semiconductor nonpipelined version users guide introduction this version of the lattice ddr sdram controller does not have pipelining, and is signi. Designware enhanced universal ddr memory controller umctl2. There is a write data request signal output from the controller. Double data rate synchronous dynamic randomaccess memory, officially abbreviated as ddr sdram, is a double data rate ddr synchronous dynamic randomaccess memory sdram class of memory integrated circuits used in computers. This family reference manual section is meant to serve as a complement to device data sheets. A single read or write access for ddr sdram modules effectively consists of a single. Design and simulation of ddr3 sdram controller for high. Ddr sdram modules use a double data rate architecture to achieve highspeed operation.
Our work will focus on asic design methodology of double data rate ddr sdram controller that is located between the ddr sdram and bus master. The principle and commands of ddr sdram controller design are explained in this paper. Placeholder content for popup link wordpress download manager best download management plugin. Ddr sdram memory controller reference design xapp851 v1. Released earlier this year, ddr appears to be fulfilling most of its developers promises as far as the speed to cost ratio. Ddr3 sdram 1 use a double data rate to achieve a high speed synchronous dynamic random access memory operations with eight register bank 2. The ddr synchronous dynamic ram is an enhancement to the conventional sdram running at bus speed over 75mhz. Keystone architecture ddr3 memory controller users guide literature number. Igloo2 optimizing ddr controller for improved efficiency libero soc v11. But an sdram is really a singleport memory, so our controller.
Design of ddr4 sdram controller ieee conference publication. The complexity of instructions to control the memory devices increases with the increase in technology. March 2009 altera corporation ddr and ddr2 sdram controller compiler user guide the performance of the entire system and in general the ddr or ddr2 sdram controller depends upon the number of masters and slaves connected to the avalon memorymapped avalonmm interface, which degrades as the number of masters and slaves connected to it. Currently, the demand of memories has been increasing due to its higher speed, lower cost and lower power consumption. Mpc5200cvr400b datasheet278 pages freescale sdramddr. An4039 powerquicc ddr3 sdram controller register setting considerations micron. This interface reduces the effort to integrate the module with the remainder of the application and minimizes. An3940 layout design considerations for ddr3 memory interface.
The component consists of a ddr sdram controller core with configurable options. Keystone architecture ddr3 memory controller users guide. The ddr and ddr2 sdram controller with altmemphy intel fpga ip core work in conjunction with the altmemphy physical interface ip function. Design and vlsi implementation of ddr sdram controller for high speed applications. Mpc5200cvr400b datasheet478 pages freescale sdramddr. The logimem sdr ddr sdram controller provides a powerful, yet simpletouse interface between the industry standard memory devices and several processor or dma devices which share the same physical memory devices and access them through the processor local bus plb, onchip peripheral bus opb. Rtl design of ddr sdram controller using verilog written by priyanka bibay published on. The memory controller provides a generic command interface to the users application. In any event, ddr sdram double data rate sdram, ddr for short, is the new kid on the block. Ddr2 sdram controller with altmemphy ip with sopc builder. Keywords ddr sdram controller, readwrite data path, cadence rtl compiler.
The ddr synchronous dynamic random access memory sdram controller implements the controls for an external memory bus interface using the dual data rate ddr version 2 protocol and electrical interface that adheres to the jedec standard jesd792f nov. An2583 programming the powerquicciii powerquiccii pro ddr sdram controller. An3369 powerquicc ddr2 sdram controller register setting considerations. Ddr1 was originally referred to as ddr sdram or simple ddr. This application note describes a virtex 4 xc4vlx25 ddr sdram controller is implemented in the device. The controller is configurable through the ip catalog. The new controller enables virtex6 users to capitalize on the improved capacity, performance and power efficiency of the latestgeneration ddr sdram technology. It takes care of row refreshes and gives an easy to use interface for the host logic to access the sdram. The reference design can be downloaded from the xilinx web site. Home products intellectual property lattice ip cores. Ddr and ddr2 sdram controllers with altmemphy ip user guide 1. A dedicated memory controller is of prime importance in applications that do not contain microprocessors highend applications.
This interface reduces the effort to integrate the module with the remainder of the application and minimizes the need to deal with. Summary this application note describes how to use a virtexii device to interface to a double data rate ddr sdram device. The msc711x memory controller supports double data rate synchronous dynamic random access memory ddr sdram devices, which are designed to be a high data rate migration path from the standard single data rate sdr memory devices. Ddr3 runs at a frequency between 800mhz to 1600 mhz.
Rtl design of ddr sdram controller using verilog ijert. The host logic can use the sdram more likely an sram because of the controller. The reference design targets a ddr sdram device at a clock rate of 200 mhz with data transfers at 400 mbs. Ddr1 double data rate sdram, or simply ddr1, was designed to replace sdram. The core accepts commands using a simple local interface and translates them to the command sequences required by ddr sdram devices. Ddr sdram controller xs datapath module write data associated with a write command is sent in contiguous cycles to the controller over a separate write data bus. Sdram controller pdf ddr and ddr2 sdram controller compiler user guide. Double data rate ddr synchronous dynamic random access memory sdram is accessed according to a set of rules and timing constraints. Introduction this application note describes a ddr sdram controller design implemented in a virtexii device. Ddr, ddr2, and ddr3 sdram with sopc builder introduction the altera ddr, ddr2, and ddr3 sdram highperformance controller megacore functions version 7. If you want to download this project or browse its svn, you can do so at the overviewpage.
The lattice double data rate ddr3 synchronous dynamic random access memory sdram controller is a generalpurpose memory controller that interfaces with industry standard ddr3 memory devicesmodules compliant with jesd793, ddr3 sdram standard, and provides a generic command interface to user applications. Figure4 shows the axi to lpddr address mapping for the lpddr sdram on the igloo2 evaluation kit board. Ddr sdram, also retroactively called ddr1 sdram, has been superseded by ddr2 sdram, ddr3 sdram and ddr4 sdram. On the right, the controller drives the sdram signals. The designware enhanced universal memory controller umctl2 is fully configurable controller that allows designers to generate a ddr controller that is optimized for latency, bandwidth, and area. On the surface, a ddr sdram component is simply a readwrite memory. Sdram controller will be dropped from quartus lite i just spotted this warning in qsys. The controller will start the write process once the associated write command is at the head of the queue.
An sdram controller specifically for providing the correct memory control signals, connections, and timing for sdram devices. This page contains files uploaded to the old opencores website as well as images and documents intended for use on other pages in this project. Functional description the ddr sdram controller block diagram, illustrated in figure 1, consists of four functional modules. All signals are synchronous to the system clock and outputs are registered at the output of the sdram controller core.
Using ddrddr2 sdram with sopc builder introduction the ddrddr2 sdram controller megacore function version 3. Ddr4 sdram controller core northwest logics double data rate 4 ddr4 sdram controller core is designed for use in applications requiring high memory throughput, high clock rates and full programmability. Mpc603e series e300 core superscalar architecture datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits. The phy layer consists of me mory initialization logic, and addresscommanddata io. The double data rate ddr synchronous dynamic random access memory sdram controller is a generalpurpose memory controller that interfaces with industry standard ddr sdram. Ddr sdram controllers are faster and efficient master. Mpc603e series e300 core with a rich set of peripheral. Ddr and ddr2 sdram controller with altmemphy ip user. Lattice semiconductor ddr sdram controller 2 since the ddr sdram controller takes care of activatingprecharging the banks, user only needs to issue simple readwrite commands.
Xperts corner improving ddr sdram efficiency with a. The xilinx ddr4 core can generate a full controller or phy only for custom controller needs. Ddr double data rate sdram was introduced as a replacement for sdram memory running. The detailed design and operation of its individual sub blocks is described. The project also contains a simple push button interface for testing on the dev board. Ddr sdram controllers are designed to interface central processor units cpus with the sdram and to ensure compliance with the rules and timing constraints. This application note describes a ddr sdram controller implemented in a virtex4. Ddr5 demonstrates a major step forward that has completely overhauled the overall ddr architecture with one primary goal. This application note examines the basics of ddr, provides general boardlevel design guidelines for using the msc711x. For ddr4, lpddr4 and more advanced features, see the enhanced universal ddr memory controller umctl2. To put things in perspective, heres a view of a typical fpga system using our sdram controller. Sdram controller will be dropped from quartus lite. This project work is a working implementation of high speed ddr double data rate sdram controller.
The logimem sdr ddr sdram controller provides a powerful, yet simpletouse interface between the industry standard memory devices and several processor or dma devices which share the same physical memory devices and access them through the processor local bus plb, onchip peripheral bus opb, xilinx cachelink and xylon memory bus. The ddr3 sdram is the nextgeneration ddr sdram memory technology which features faster speed, mitigated sso, and reduced routing due. The double data rate architecture is essentially a 2 nprefetch architecture with an interface designed to transfer two data words per clock cycle at the io pins. Sdram controllers with altmemphy ip offer the highperformance controller ii. Ddr3 sdram controller with altmemphy ip and altmemphy. Now our controller makes the sdram appear as a dualport memory. The ddr sdram operates from a differential clock ck and ck. This application note describes the ddr sdram controller design implemented in a virtex. However, since the ddr3 sdram s are rather complex, and there is a lot of work required to manage them, controllers for ddr3 sdram s are primarily in the realm of proprietary. A block diagram showing how these components are interfaced is illustrated in figure551. Designware basic universal ddr memory and protocol. Ddr sdram controller megacore function user guide gettingabout this core about this core the ddr sdram controller is optimized for altera cyclone, stratix, 1 stratix gx, and apex ii devices. A data control circuit for a double data rate ddr synchronous dynamic randomaccess memory sdram that secures a stable readingwriting operation of ddr sdram data by generating an actively controllable internal data strobe signal.
Multiport ddr controller overview the multiport ddr sdram controller mp ddrc is a multiport memory controller. The component consists of a ddr sdram controller core with configurable options and. Abstract this project work is a working implementation of high speed ddr double data rate sdram controller. The designware basic universal ddr controllers consist of the universal ddr protocol controller and the universal ddr memory controller, which support the jedec ddr3, ddr2, mobile ddr, lpddr2, and lpddr3 sdram standards. This application note discusses the following topics.
Ii fpgas, and the ddr sdram datasheet for more guidelines on termination techniques. The memory controller provides command signals for memory refresh, read and write operation and initialization of sdram. Now days, ddr sdram double data rate synchronous dynamic random access memory has become the most popular class of memory used in computers due to its high speed, burst access and pipeline feature. Pdf implementation of ddr sdram controller using verilog.
The advanced features available in these devices allow you to interface direct ly to ddr sdram devices and to use. Dqs is edgealigned with data for reads and centeraligned with data for writes. Ddr sdram controller verilog code and chinese documentation. Mpc5200cvr400b datasheet178 pages freescale sdramddr.
This implementation uses the clock directly controls technology to realize data acquisition, an. The data control circuit includes an internal data strobe signal generating circuit generating and outputting an internal data strobe signal a rising. In reality, however, modern ddr sdrams are complex devices. Xilinx xapp851 ddr sdram controller using virtex5 fpga. Using highperformance ddr, ddr2, ddr3 sdram with sopc builder. Ddr sdram, also retroactively called ddr1 sdram, has been superseded by.
View and download samsung ddr3 sdram product manual online. Ddr sdram controller pipelined lattice semiconductor. The altmemphy megafunction is an interface between a memory controller and the. The ddr3 sdram architecture is based on prefetch architecture with the design of two data words over clock cycle. Pdf asic implementation of ddr sdram memory controller. Home products intellectual property lattice ip cores ddr sdram controller pipelined for ispxpga and orca4 ddr sdram controller pipelined for ispxpga and orca4 overview ddr double data rate sdram was introduced as a replacement for sdram memory running at bus speeds over 75mhz. Us20080181046a1 clock circuitry for ddrsdram memory. The core accepts commands using a simple local interface and translates them to the command sequences required by ddr4 sdram devices. This family reference manual section is meant to serve as a complement to device. Figure 4 shows the axi to lpddr address mapping for the lpddr sdram on igloo2 evaluation kit board. Altera corporation ddr sdram controller white paper 3 ddr sdram controller description ddr sdram controller interface signals the ddr sdram controller interface signals are shown in table 2 interface signals. The control logic initializes the memory after reset and issues refresh commands from time to time to ensure data integrity.
Dqs is a strobe transmitted by the ddr sdram during reads and by the memory controller during writes. Currently, as of this posting 20160728, there are no ddr3 sdram controllers on opencores. A circuit for providing a delayed clock signal to a synchronous memory controller controlling a synchronous memory device comprises logic delay circuitry for performing synchronous memory device read access, the logic delay circuitry generating delay interval information. Learn, imagine, innovate, solve, and gain insight on the technology trends of today and tomorrow from thought leaders around the world. Ddr sdram controller core northwest logics double data rate ddr sdram controller core is designed for use in applications requiring high memory throughput, high clock rates and full programmability. Mpc603e series e300 core superscalar architecture datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. This is a very a simple sdram controller which works on the de0 nano.
Dolphins hardened ddr432 sdram phy and lpddr432 sdram phy ip is a siliconproven, combo phy supporting speeds up to 4266 mbps. Us6842821b2 ddr sdram memory controller with multiple. The designware enhanced universal memory controller umctl2 is fully configurable controller that allows designers to generate a ddr controller that is. The detailed design and operation of its individual sub blocks is. The transition from ddr4 to ddr5 represents far more than a typical ddr sdram generational change. Pdf design and vlsi implementation of ddr sdram controller.
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