Hardware Design And Implementation Of DDR3 Memory Modules In Digital Three-dimensional Oscilloscope

With the gradual increase of signal frequency and signal complexity,the greater storage depth,quicker data access and dealing rate are important ways of improving contemporary oscilloscope catching the unusual signals.As the main storage module,the design of DDR3 has a direct influence on working efficiency of ADC system and waveform processing module. This research uses digital three-dimensional oscilloscope as the hardware designing platform,realizates the hardware design of DDR3 storage module,and puts the recording and reflecting of the deep storage into practice.Using classical storage frame of FPGA+DDR3 and great rate of DDR3 capacity and storage, this task enables high data-handling and responding of digital three-dimensional oscilloscope under the style of deep storage.The main contents of this essay include the design of DDR3 and its peripheral circuit,the design of power distribution network,the design of signal and power integrities,the design and realization of DDR3’s deep storage function.In the hardware design of DDR3 module,the design cycle is simplified with MIG core,data transport module of 4:1,which makes DDR3 based on FPGA reach the reading and writing speed to 6.4GB/s, improving the data access efficiency.In the design of power system,by means of decoupling, isolating and impedance matching,it lowers the system noise,improves the signal and power integrities,and it has gone through the EMC test of national standards(GB 4824,frequency:30~1000MHz).In the function design of DDR3’s deep storage, it has improved its former recording and reflecting modules. With segmentation and Fragmentation and Centralized Mapping, not only the dead time is reduced, but also the unusual signals’ capturing ability of three-dimensional oscilloscope has greatly improved.Furthermore,this task puts forward some improvements on the important and difficult points(High-speed hardware design and key technologies of deep storage) of DDR3’s storage module. Eventually, it completes the hardware design of storage module in the three-dimensional oscilloscope, realizing the recording and reflecting of the deep storage,maximum changeable storage depth to 280 Mpts, wave capturing rate over 200,000wfms/s.