The address fifo can be replaced by a fifo16 element in designs with different clock frequencies. Double data rate ddr sdram controller lattice semiconductor nonpipelined version users guide signal descriptions the following tables show the interface signals for the ddr sdram controller. This is a very a simple sdram controller which works on the de0 nano. Synchronous tells about the behaviour of the dram type. 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. This interface allows easy usage of the lattice ddr sdram controller on an arm ahb bus environment. Sopc builder avalonmm slave and master clock selection note 1 notes to figure 1. The project also contains a simple push button interface for testing on the dev board. Pdf design and vlsi implementation of ddr sdram controller.
Double data ratesdram, or simply ddr1, was designed to replace sdram. Micron technology, inc, reserves the right to change products or specifications without notice. Ddr, ddr2, ddr3, and ddr4 sdram products mercury systems. To allow the user to create a mch opb ddr2 sdram controller. Ddr sdram controller table 551 provides a summary of all ddr sdram controller sfrs.
Jun 16, 2016 design and fpga implementation of ddr3 sdram controller for also the advantages of ddr3 over ddr2 and ddr are discussed. Select all download selected as zip file advanced sdr sdram controller design documentation rd1010 4. Download ddr2 and ddr3 sdram controllers with uniphy user guide. Keywords ddr sdram controller, readwrite data path, cadence rtl compiler. To allow the user to create a mch opb ddr2 sdram controller that is uniquely tailored for the. 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. The parameter editor generates a design example, instantiates a phaselocked loop pll, an example driver, your ddr or ddr2 sdram controller custom variation, and an optional delaylocked loop dll for stratix fpga series only. The operations of ddr sdram controller is to simplify the sdram command interface to the. Keep the drams simple, put complexity in the controller there are three critical decisions that forever complicated the ddr sdram memory controller. This scope will subsequently be expanded to formally apply to x32 devices, and higher density devices as well the purpose of this standard is to define the minimum set of requirements for jedec compliant 64mb through 1gb, x4x8x16 ddr sdrams. Ddr sdram, also called ddr1 sdram, has been superseded by ddr2.
Second generation of ddr memory ddr2 scales to higher clock frequencies. The design example is a fully functional design that can be simulated, synthesized, and used in hardware. Designware ddr2ddr sdram memory controller synopsys. Lattice semiconductor ddr sdram controller 7 table 3. 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. Figure 11 shows a systemlevel diagram includin g the example toplevel file that the ddr or ddr2 sdram controller with altmemphy ip creates for you. Asic implementation of ddr sdram memory controller amit bakshi. This interface reduces the effort to integrate the module with the remainder of the application and minimizes the need to deal with. Each acx series controller comes standard with 32 mb of flash memory and 128 mb of ddr sdram. Using ddrddr2 sdram with sopc builder download the sram object file on page 39 incorporate nios ii ide on page 40 test the system on page 44 create a new quartus ii project to create a new quartus ii project, follow these steps. The fpgas csg324 package is important here because xilinx spartan 6 lx9 is available in some other packages that dont have a builtin memory controller. Ddr sdram popularized the technique of referring to the bus bandwidth in megabytes per second, the product of the transfer rate and the bus width in bytes. This family reference manual section is meant to serve as a complement to device. This memory device provides higher reliability, availability and serviceability than other ddr memories.
The ddr3 sdram controller with altmemphy ip offers the highperformance controller ii hpc ii, which provides high efficiency and advanced features. Sdr sdram controller advanced lattice semiconductor. Ddr and ddr2 sdram controller with altmemphy intel fpga ip. This allows the user to have a design that only utilizes. When we introduced ddr sdram, it was a revolutionary and pioneering technologyenabling applications to transfer data on both the rising and falling edges of the clock signaland vastly improving. Ddrddr2 memory controller with the remainder of the application. Xilinx is providing this design, code, or information as is. The ddr ddr2 ip core is available for download from the lattices ip. Mobile ddr sdram controller core northwest logics mobile double data rate ddr sdram controller core is designed for use in applications requiring high memory throughput, high clock rates and full. Enable peak performance of the fastest processors, fpgas and sensors with highspeed dense ddr memory devices. The flash memory is used to preserve 12 mb of application and runtime data. Overview on page 2 set up the quartus ii project on page 3 generate a ddr2 sdram controller megacore function on page 5. View and download samsung ddr3 sdram product manual online.
Dimm implementations have expanded from unregistered dimms to include registered dimms and fbdimms fully. Design and vlsi implementation of ddr sdram controller for high speed applications. Ddr1 was originally referred to as ddr sdram or simple ddr. The component consists of a ddr sdram controller core with configurable options. This application note examines the basics of ddr, provides general boardlevel design guidelines for using the msc711x. The synopsys designware ddr2ddr sdram memory controller ip mctl offers an efficient digital interface between up to 32 onchip application buses and a ddr2ddr physical layer phy in a ddr2 or ddr memory subsystem. Ddr sdram interface bus signals burst type burst type. The ddr sdram interface signals are the same for all core con. Figure 4 shows the system with an ahb bus interface block.
Dell is not responsible for errors in typography or photography. Ddr sdram, also retroactively called ddr1 sdram, has been superseded by ddr2 sdram, ddr3 sdram and ddr4 sdram. Since that time the denali ddr controller ip has been used in countless diverse applications delivering superior data throughput and continuing to incorporate new innovative capabilities that provide ddr dram subsystem. This evolution has also been driven by how computer memories. For the ddr sdram controller, the data passes through the controller, and the controller handles all ddr related synchronization and timing generation. 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 and ddr2 sdram controller with altmemphy ip user. 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. Designware basic universal ddr memory and protocol.
Design and fpga implementation of ddr3 sdram controller for. Media in category sdram the following files are in this category, out of total. This scope will subsequently be expanded to formally apply to x32 devices, and higher density devices as well the purpose of this standard is to define the minimum set of requirements for jedec compliant. When ddr2 was introduced, ddr became referred to as ddr1. The ddr3 sdram uses an 8n prefetch architecture to achieve high speed operation.
Introduction the altera ddr sdram controller megacore function provides a simplified interface to industrystandard ddr sdram memory. Perhaps the most noteworthy elements of the ddr and ddr2 sdram standard were the adoption of source synchronous clocking and the incorporation of an onchip dll or equivalent circuit. The phy layer consists of me mory initialization logic, and addresscommanddata io. Names of components constantly change as newer technologies are introduced, especially when the newer technology is based on a previous e one. Keystone architecture ddr3 memory controller users guide literature number. To allow the user to create a mch opb dd r2 sdram controller that is uniquely tailored for the system, certain features are parameterizable in the mch opb ddr2 sdram controller design. Xilinx xapp851 ddr sdram controller using virtex5 fpga. The component consists of a ddr sdram controller core with configurable options and a ddr. What is the difference between sdram, ddr1, ddr2, ddr3 and.
Ddr sdram controller pipelined lattice semiconductor. Ddr double rate sdram controller reference design verilog code, can be directl. The core accepts commands using a simple local interface and translates them to the command sequences required by ddr sdram devices. The ddr sdram controller uses a 90o phase shifted system clock to capture read data in the center of the data window. Functional block diagram of ddr sdram controller 2. Ddrc register summary register name bit range bits 3115 3014 29 2812 2711 2610 259 248 237 226 215 204 193 182 171 16. Using highperformance ddr, ddr2, and ddr3 sdram with sopc builder figure 1. Mimas v2 spartan 6 fpga development board with ddr sdram. This evolution has also been driven by how computer memories are used on dimms dual inline memory modules. The data bus transfers data on both rising and falling edge of the clock ddr sdram. Asic implementation of ddr sdram memory controller. Read online ddr2 and ddr3 sdram controllers with uniphy user guide.
The ddr sdram controller supports data width of 64 bits and burst length of 4 and cas column address strobe latency of 2 and in this pipelined sram controller design, improvement of 28. Ddr sdram, as the first generation of ddr memory, the prefetch buffer is 2bit, which is the double of sdr sdram. Ddr3 sdram controller with altmemphy user guide, external. The megawizard plugin manager generates an exam ple toplevel file. Figure 11 on page 11 shows a systemlevel diagram including the example toplevel file that the ddr3 sdram controller with altmemphy ip creates for you. The memory controller provides a generic command interface to the users application.
For ddr4, lpddr4 and more advanced features, see the enhanced universal ddr memory controller umctl2. Ddr sdram memory controller reference design xapp851 v1. Corresponding registers appear after the summaries, which include a detailed description of each bit. Design and implementation of high speed ddr sdram controller. The ddr3 sdram controller is available as an ipexpress user configurable ip core, which allows the configuration of the ip and generation of a netlist and simulation file for use in designs. This application note describes a ddr sdram controller implemented in a virtex4. The core also has separate datain and dataout buses at the user interface. Apr 29, 2016 mimas v2 has a xilinx spartan 6 lx9 fpga in csg324 package has two builtin memory controllers and a 512mbit lpddr sdram lp stands for low power and ddr stands for double data rate. Using highperformance ddr, ddr2, ddr3 sdram with sopc builder. 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. Ddr sdram controller verilog code and chinese documentation. Once the download process is over, the configuration controller will try to boot the fpga from the spi flash automatically.
Advanced miniaturization technologies transform 18 individual devices into one. Since that time the denali ddr controller ip has been used in countless diverse. The top module of the ddr3 sdram controller is shown in figure 1. All books are in clear copy here, and all files are secure so dont worry about it. Test ddr or ddr2 sdram interfaces on hardware this application note details the following topics that help you build a standalone synthesizable circuit that demonstrates the ddr2 sdram interface. Pdf asic implementation of ddr sdram memory controller. Careful usage generally talks about 500 mhz, double data rate or mts, but many refer casually to a mhz bus, even though no signal cycles faster than 500 mhz. 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. The cadence denali ddr controller ip technology continues to advance since its inception well over a decade ago. Sensorys software for speech recognition, speech synthesis, speaker verification, and music synthesis has been ported to tensilcias hifi audiovoice dsps. Learning fpga and verilog a beginners guide part 6 ddr. The lovehate relationship with ddr sdram controllers. About this core ddr sdram controller megacore function user guide table 5 shows the level of support offered by the ddr sdram controller megacore function to each of the altera device families. Compiles ddr sdram controller with vhdl the source code ddr sdram information, interested to see friends down under.
Ddr controller provides a synchronous command interface to the ddr sdram memory along with several control signals. 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. Using highperformance ddr, ddr2, ddr3 sdram with sopc. Lattice semiconductor ddr sdram controller 6 ahb bus interface block the ahb bus interface block interfaces between amba bus and lattice ddr sdram controller ip core. Sdram synchronous dram, ddr double data rate sdram, ddr2 double data rate 2 sdram, and ddr3 double data rate 3 sdram. This section of the manual contains the following major topics. Its primary benefit is the ability to operate the external data bus twice as fast as ddr sdram. Contains the ddr3 sdram highperformance controller megacore function files. The xilinx mch opb ddr2 sdram controller is a soft ip.