DDR3L内存操作时序详解与控制命令解读

DDR3
DDR3L
操作时序
详解各命令
需积分: 16 3 下载量 152 浏览量 更新于2024-07-17 收藏 4.68MB PDF 举报
DDR3L Device Operation Timing Diagram Computing.pdf是一份深入解析DDR3和DDR3L内存设备操作时序的关键文档。该文档详细阐述了这些高级内存标准中的关键特性，对于理解和设计基于DDR3/DDR3L的系统具有重要价值。 1. 功能描述与状态图： 文档首先介绍了DDR3L SDRAM的基本功能，通过简化状态图来直观展示内存的工作流程，包括从电源上电到稳定工作状态的初始化过程。这涉及到了两个阶段：一是电源上电初始化序列，确保内存模块在供电后能正确配置；二是当电源稳定后进行的复位初始化，确保所有寄存器设定正确。 2. 模式寄存器编程： DDR3L内存的操作依赖于多个模式寄存器（MR0、MR1、MR2和MR3），这些寄存器用于设置工作频率、数据宽度、刷新周期等关键参数。文档详细解释了如何编程这些寄存器，以便适配不同的系统需求。 3. 命令描述与操作： 本文档的核心部分详述了各种内存命令的真值表，如控制信号（如CKE）的行为、无操作（NOP）命令、去选（Deselect）命令、DLL（差分延迟线）的开关模式切换过程，以及输入时钟频率变化的影响。特别是，写平滑（Write Leveling）技术被详细讨论，它有助于提高数据一致性并减小信号噪声。 4. 温度扩展使用： DDR3L允许在更宽的温度范围内工作，文档提到了自动自我刷新（ASR）模式，这是一种节能状态，用于在低功耗情况下保持数据。同时，文档明确了自刷新温度范围（SRT），以确保在极端条件下内存仍能正常工作。 5. 多功能寄存器(MPR)： MPR是一个重要的辅助寄存器，用于存储额外的控制信息或配置选项。文档详细解释了MPR的功能，并提供了其地址定义，以供开发人员灵活调整内存行为。 这份文档为设计者提供了全面的DDR3L内存操作指南，涵盖了从基本原理到实际应用的方方面面，帮助读者掌握如何有效管理时序，优化内存性能，以及处理温度变化带来的挑战。对于从事内存系统设计、测试或维护的工程师来说，这是一份不可或缺的参考资料。

ddr3_device_operation_timing_diagram_rev14-2.pdf

2020-07-26 上传
DDR3 SDRAM的时序图，供学习调用DDR3使用。 目录 DDR3 SDRAM Specification 1. Functional Description .........................................................................................................

Computing_DDR3L_H5TC4G4

2017-10-17 上传
SK DDR3 主要的timing及部分feature介绍，total35 page Description The H5TC4G43AFR-xxA, H5TC4G83AFR-xxA and H5TC4G63AFR-xxA are a 4Gb low power Double Data Rate III (DDR3L) Synchronous DRAM, ideally ...

samsung-ddr3_device_operation_timing_diagram

2014-03-26 上传
三星DDR3设备操作时序图的知识点： 首先，关于DDR3 SDRAM（双倍数据速率同步动态随机存取存储器）的基础知识，DDR3是内存技术发展的一个标准，它继承了DDR2的架构，但在性能和规格上做了许多改进。DDR3具有更高的...

parentdir = 'F:\data process\fMRI\fmrioutput'; % 定义储存各被试源文件的上级文件夹 cd(parentdir); % 进入这个上级文件夹 allsubjects = dir('sub*');%查找该文件夹下的所有被试 subinfos = numel(allsubjects); for i=1:numel(allsubjects) % 对每个被试进行循环 cursubject = allsubjects(i).name; % 找到当前被试的名字 matlabbatch=cell(1); curWPAT = fullfile(parentdir,cursubject,'WPAT'); curfucout=fullfile('F:\data process\fMRI\fmrioutput',cursubject,'WPAT') matlabbatch{1}.spm.stats.fmri_spec.dir = {curfucout}; a=curWPAT('sw*nii',curfucout); matlabbatch{1}.spm.stats.fmri_spec.timing.units = 'scans'; matlabbatch{1}.spm.stats.fmri_spec.timing.RT = 2; matlabbatch{1}.spm.stats.fmri_spec.timing.fmri_t = 16; matlabbatch{1}.spm.stats.fmri_spec.timing.fmri_t0 = 8;怎么改

2023-05-24 上传
matlabbatch.spm.stats.fmri_spec.timing.units = 'scans'; matlabbatch.spm.stats.fmri_spec.timing.RT = 2; matlabbatch.spm.stats.fmri_spec.timing.fmri_t = 16; matlabbatch.spm.stats.fmri_spec.timing....

clear;clc parentdir = 'F:\data process\fMRI\fmrioutput'; % 定义储存各被试源文件的上级文件夹 cd(parentdir); % 进入这个上级文件夹 allsubjects = dir('sub*');%查找该文件夹下的所有被试 subinfos = numel(allsubjects); for i=1:numel(allsubjects) % 对每个被试进行循环 cursubject = allsubjects(i).name; % 找到当前被试的名字 matlabbatch=cell(1); curWPAT = fullfile(parentdir,cursubject,'WPAT'); curfucout=fullfile('F:\data process\fMRI\fmrioutput',cursubject,'WPAT') matlabbatch{1}.spm.stats.fmri_spec.dir = {curfucout}; matlabbatch{1}.spm.stats.fmri_spec.sess.scans = cellstr(spm_select('ExtFPList', curWPAT, '^sw*.nii', Inf)) matlabbatch{1}.spm.stats.fmri_spec.timing.units = 'scans'; matlabbatch{1}.spm.stats.fmri_spec.timing.RT = 2; matlabbatch{1}.spm.stats.fmri_spec.timing.fmri_t = 16; matlabbatch{1}.spm.stats.fmri_spec.timing.fmri_t0 = 8; %% matlabbatch{1}.spm.stats.fmri_spec.sess.cond = struct('name', {}, 'onset', {}, 'duration', {}, 'tmod', {}, 'pmod', {}, 'orth', {}); matlabbatch{1}.spm.stats.fmri_spec.sess.multi = {'D:\data process\fMRI\onsets\subject(i)_run1.mat'}; matlabbatch{1}.spm.stats.fmri_spec.sess.regress = struct('name', {}, 'val', {}); matlabbatch{1}.spm.stats.fmri_spec.sess.tempxx=dir(fullfile(curfucout,'rp*.txt')) matlabbatch{1}.spm.stats.fmri_spec.sess.hpf = 128; matlabbatch{1}.spm.stats.fmri_spec.fact = struct('name', {}, 'levels', {}); matlabbatch{1}.spm.stats.fmri_spec.bases.hrf.derivs = [0 0]; matlabbatch{1}.spm.stats.fmri_spec.volt = 1; matlabbatch{1}.spm.stats.fmri_spec.global = 'None'; matlabbatch{1}.spm.stats.fmri_spec.mthresh = 0.8; matlabbatch{1}.spm.stats.fmri_spec.mask = {''}; matlabbatch{1}.spm.stats.fmri_spec.cvi = 'AR(1)'; matlabbatch{2}.spm.stats.fmri_est.spmmat(1) = cfg_dep('fMRI model specification: SPM.mat File', substruct('.','val', '{}',{1}, '.','val', '{}',{1}, '.','val', '{}',{1}), substruct('.','spmmat')); matlabbatch{2}.spm.stats.fmri_est.write_residuals = 0; matlabbatch{2}.spm.stats.fmri_est.method.Classical = 1; matlabbatch{3}.spm.stats.con.spmmat(1) = cfg_dep('Model estimation: SPM.mat File', substruct('.','val', '{}',{2}, '.','val', '{}',{1}, '.','val', '{}',{1}), substruct('.','spmmat')); matlabbatch{3}.spm.stats.con.consess{1}.tcon.name = 'Old'; matlabbatch{3}.spm.stats.con.consess{1}.tcon.weights = 1; matlabbatch{3}.spm.stats.con.consess{1}.tcon.sessrep = 'none'; matlabbatch{3}.spm.stats.con.delete = 0; end；怎么改

2023-05-24 上传
matlabbatch{1}.spm.stats.fmri_spec.timing.units = 'scans'; matlabbatch{1}.spm.stats.fmri_spec.timing.RT = 2; matlabbatch{1}.spm.stats.fmri_spec.timing.fmri_t = 16; matlabbatch{1}.spm.stats.fmri_...

[Timing 38-472] The REFCLK pin of IDELAYCTRL u_system/mig_7series_0/u_system_mig_7series_0_2_mig/u_iodelay_ctrl/u_idelayctrl_200 is not reached by any clock but IDELAYE2 u_system/mig_7series_0/u_system_mig_7series_0_2_mig/u_memc_ui_top_axi/mem_intfc0/ddr_phy_top0/u_ddr_mc_phy_wrapper/u_ddr_mc_phy/ddr_phy_4lanes_1.u_ddr_phy_4lanes/ddr_byte_lane_D.ddr_byte_lane_D/ddr_byte_group_io/input_[4].iserdes_dq_.idelay_dq.idelaye2 has REFCLK_FREQUENCY of 200.000 Mhz (period 5.000 ns). The IDELAYCTRL REFCLK pin frequency must match the IDELAYE2 REFCLK_FREQUENCY property value.

2023-06-12 上传
这是一个时序警告，意味着 IDELAYCTRL 模块的 REFCLK 引脚没有被任何时钟信号驱动，但是其下属的 IDELAYE2 模块的 REFCLK_FREQUENCY 属性值为 200MHz。在这种情况下，IDEAYCTRL 模块的 REFCLK_FREQUENCY 应该与其...

torch.save(model.state_dict(), r'./saved_model/' + str(args.arch) + '_' + str(args.batch_size) + '_' + str(args.dataset) + '_' + str(args.epoch) + '.pth') # 计算GFLOPs flops = 0 for name, module in model.named_modules(): if isinstance(module, torch.nn.Conv2d): flops += module.weight.numel() * 2 * module.in_channels * module.out_channels * module.kernel_size[ 0] * module.kernel_size[1] / module.stride[0] / module.stride[1] elif isinstance(module, torch.nn.Linear): flops += module.weight.numel() * 2 * module.in_features start_event = torch.cuda.Event(enable_timing=True) end_event = torch.cuda.Event(enable_timing=True) start_event.record() with torch.no_grad(): output = UNet(args,3,1).to(device) end_event.record() torch.cuda.synchronize() elapsed_time_ms = start_event.elapsed_time(end_event) gflops = flops / (elapsed_time_ms * 10 ** 6) print("GFLOPs: {:.2f}".format(gflops)) return best_iou, aver_iou, aver_dice, aver_hd, aver_accuracy, aver_recall, aver_precision, aver_f1score, aver_memory, fps, parameters, gflops出现错误 best_iou,aver_iou,aver_dice,aver_hd, aver_accuracy, aver_recall, aver_precision, aver_f1score, aver_memory, FPS, parameters, gflops = val(model,best_iou,val_dataloader) File "D:/BaiduNetdiskDownload/0605_ghostv2unet _tunnelcrack/ghostunet++/UNET++/main.py", line 143, in val return best_iou, aver_iou, aver_dice, aver_hd, aver_accuracy, aver_recall, aver_precision, aver_f1score, aver_memory, fps, parameters, gflops UnboundLocalError: local variable 'gflops' referenced before assignment怎么修改

2023-06-08 上传
def val(model, best_iou, val_dataloader, device): model.eval() aver_iou = 0 aver_dice = 0 aver_hd = 0 aver_accuracy = 0 aver_recall = 0 aver_precision = 0 aver_f1score = 0 aver_memory = 0 ...

将这段代码改为C++：import os from logging import getLogger, DEBUG, handlers, Formatter from src.config import temp, basic base_dir = basic.temp_root_dir + "/ahsg/" def log_record(log_name=None, file_name=None, file_size=None, file_bat=None): if not isinstance(log_name, str): log_name = 'logg' if not (isinstance(file_name, str) and file_name.endswith('.log')): file_name = f'{log_name}.log' if not isinstance(file_size, int): file_size = 5000000 if not isinstance(file_bat, int): file_bat = 1 __loggg = getLogger(log_name) if not __loggg.handlers: __loggg.setLevel(DEBUG) file_log = handlers.RotatingFileHandler(file_name, maxBytes=file_size, backupCount=file_bat) file_log.setFormatter(Formatter(f"%(asctime)s-['{log_name}']-%(levelname)s:%(message)s")) __loggg.addHandler(file_log) return __loggg log_report_station_behaviour = log_record('station_behaviour', base_dir + 'station_behaviour.log') log_report_timing_violation_placement = log_record('timing_violation_placement', base_dir + 'timing_violation_placement.log') log_report_region_detection = log_record('region_detection', base_dir + 'region_detection.log')

2023-06-10 上传
logger log_report_timing_violation_placement = log_record("timing_violation_placement", base_dir + "timing_violation_placement.log"); logger log_report_region_detection = log_record("region_detection...

#!/usr/bin/env python #coding: utf-8 import os from time import time from datetime import datetime from netmiko import ConnectHandler from openpyxl import Workbook from openpyxl import load_workbook def read_device_excel( ): ip_list = [] wb1 = load_workbook('E:\/Users/Wayne_Peng/Desktop/cs_lab.xlsx') ws1 = wb1.get_sheet_by_name("Sheet1") for cow_num in range(2,ws1.max_row+1): ipaddr = ws1["a"+str(cow_num)].value ip_list.append(ipaddr) return ip_list def get_config(ipaddr): session = ConnectHandler(device_type="huawei", ip=ipaddr, username="mtlops", password="cisco,123", banner_timeout=300) print("connecting to "+ ipaddr) print ("---- Getting HUAWEI configuration from {}-----------".format(ipaddr)) # config_data = session.send_command('screen-length 0 temporary') # config_data = session.send_command('dis cu | no-more ') # command = 'display version | display cpu-usage | display memory-usage' # config_data = session.send_command(command) commands = ['display version', 'display cpu-usage', 'display memory-usage'] config_data = '' for cmd in commands: output = session.send_command_timing(cmd) config_data += f'{cmd}\n{output}\n' session.disconnect() return config_data def write_config_to_file(config_data,ipaddr): now = datetime.now() date= "%s-%s-%s"%(now.year,now.month,now.day) time_now = "%s-%s"%(now.hour,now.minute) #---- Write out configuration information to file config_path = 'E:\/Users/Wayne_Peng/Desktop/' +date verify_path = os.path.exists(config_path) if not verify_path: os.makedirs(config_path) config_filename = config_path+"/"+'config_' + ipaddr +"_"+date+"_" + time_now # Important - create unique configuration file name print ('---- Writing configuration: ', config_filename) with open( config_filename, "w",encoding='utf-8' ) as config_out: config_out.write( config_data ) return def main(): starting_time = time() ip_list = read_device_excel() for ipaddr in ip_list: hwconfig = get_config(ipaddr) write_config_to_file(hwconfig,ipaddr) print ('\n---- End get config threading, elapsed time=', time() - starting_time) #======================================== # Get config of HUAWEI #======================================== if __name__ == '__main__': main() 加一段gevent，def run_gevent(）

2023-05-26 上传
output = session.send_command_timing(cmd) config_data += f'{cmd}\n{output}\n' session.disconnect() return config_data def write_config_to_file(config_data,ipaddr): now = datetime.now() date= "%...

代码优化： quarter_dict = { '1': [date(year=timing.year, month=1, day=1), date(year=timing.year, month=3, day=calendar.monthrange(timing.year, 3)[-1])], '2': [date(year=timing.year, month=1, day=1), date(year=timing.year, month=3, day=calendar.monthrange(timing.year, 3)[-1])], '3': [date(year=timing.year, month=1, day=1), date(year=timing.year, month=3, day=calendar.monthrange(timing.year, 3)[-1])], '4': [date(year=timing.year, month=4, day=1), date(year=timing.year, month=6, day=calendar.monthrange(timing.year, 6)[-1])], '5': [date(year=timing.year, month=4, day=1), date(year=timing.year, month=6, day=calendar.monthrange(timing.year, 6)[-1])], '6': [date(year=timing.year, month=4, day=1), date(year=timing.year, month=6, day=calendar.monthrange(timing.year, 6)[-1])], '7': [date(year=timing.year, month=7, day=1), date(year=timing.year, month=9, day=calendar.monthrange(timing.year, 9)[-1])], '8': [date(year=timing.year, month=7, day=1), date(year=timing.year, month=9, day=calendar.monthrange(timing.year, 9)[-1])], '9': [date(year=timing.year, month=7, day=1), date(year=timing.year, month=9, day=calendar.monthrange(timing.year, 9)[-1])], '10': [date(year=timing.year, month=10, day=1), date(year=timing.year, month=12, day=calendar.monthrange(timing.year, 12)[-1])], '11': [date(year=timing.year, month=10, day=1), date(year=timing.year, month=12, day=calendar.monthrange(timing.year, 12)[-1])], '12': [date(year=timing.year, month=10, day=1), date(year=timing.year, month=12, day=calendar.monthrange(timing.year, 12)[-1])] }

2023-05-27 上传
quarter_dict[quarter[0]] = [date(year=timing.year, month=start_month, day=1), date(year=timing.year, month=end_month, day=calendar.monthrange(timing.year, end_month)[-1])] ``` 这样的代码看起来更加...
wmjoin
  • 粉丝: 0
  • 资源: 6
上传资源 快速赚钱

最新资源