LPDDR4: Evolution for new Mobile World

Transcription

1 LPDDR4: Evolution for new Mobile World JungYong(JY) Choi Senior Manager Samsung Semiconductor Inc. 1 / 22

2 Legal Disclaimer This presentation is intended to provide information concerning memory industry trends. We do our best to make sure that information presented is accurate and fully up-to-date. However, the presentation may be subject to technical inaccuracies, information that is not up-to-date or typographical errors. As a consequence, Samsung does not in any way guarantee the accuracy or completeness of information provided on this presentation. Samsung reserves the right to make improvements, corrections and/or changes to this presentation at any time. The information in this presentation or accompanying oral statements may include forward-looking statements. These forward-looking statements include all matters that are not historical facts, statements regarding the Samsung Electronics' intentions, beliefs or current expectations concerning, among other things, market prospects, growth, strategies, and the industry in which Samsung operates. By their nature, forward-looking statements involve risks and uncertainties, because they relate to events and depend on circumstances that may or may not occur in the future. Samsung cautions you that forward looking statements are not guarantees of future performance and that the actual developments of Samsung, the market, or industry in which Samsung operates may differ materially from those made or suggested by the forward-looking statements contained in this presentation or in the accompanying oral statements. In addition, even if the information contained herein or the oral statements are shown to be accurate, those developments may not be indicative developments in future periods. 2 / 22

3 Contents 1. Mobile Industry trends 2. LPDDR4 features and benefits 3. LPDDR4 positioning 4. LPDDR4 schedule 3 / 22

4 Post-PC Market Dynamics W/W Smartphone + Tablet Installed Base > PC in Q % of is Now Opened on a Mobile Device Source: KPCG Internet Trends 4 / 22

5 Where Will Users Spend their Time? Average Traffic Per Mobile Device Type 8X 4X 7X 2X Smartphones and Tablets will Soon Drive Similar Data Levels as PCs Source: Cisco VNI 5 / 22

6 What is Driving High Bandwidth - 1 Larger Screen size Smartphone Tablet Notebook / 22

7 What is Driving High Bandwidth - 2 High Resolution 9X 1X 2.3X 3.4X 4.5X 5.7X 1280/ / / / x x2160 HD FHD QXGA WQXGA QSXGA UHD 7 / 22

8 What is Driving High Bandwidth - 3 Advanced Camera functionality Burst Shot Feature HDR Augmented Reality Panoramic Shot 8 / 22

9 B/W Requirement is Driven by Graphics LPDDR4E 32.0GB/s LPDDR4 25.6GB/s 19.2GB/s UD (Ultra Definition) LPDDR3E 12.8GB/s LPDDR3 LPDDR2 6.4GB/s WQXGA Tablet application Source: Samsung 9 / 22

10 What is LPDDR4? Low Power DDR4 Evolutionary solution - Higher Pin Bandwidth - vs. Wide IO2: Revolutionary solution - Much wider Pin Width 10 / 22

11 LPDDR4 Key Features Evolutionary DRAM technology enables 3.2Gbps and faster Speed Items LPDDR3 LPDDR4 Comments CLK MHz (~1066MHz w/ LP3E) 11 / MHz 2X, Pursues higher speed CMD/ADDR DDR SDR - DQ DDR DDR Band Width 12.8GB/s+ (2ch) 25.6GB/s+ (2ch) 2X Voltage VDD2/VDDQ/VDD1 1.2/1.2/ /1.1/1.8 Total Pd 10% Architecture Interface [# o Ch & DQs]/ Die x32 2x16 IDD4 20% # of Bank/channel Page Size 4K 2K IDD0 10% BL B/ch I/O interface HSUL LVSTL 40% I/O power No term reduction DQ ODT VSSQ Term (VDDQterm option) (vs. POD) CA ODT No term VSS term Optional Vref External Internal

12 Innovative Low Power Interface - LVSTL LVSTL (Low Voltage Swing Terminated Logic) High frequency operation with less IO power consumption No DC power consumption when driving low Lower Cio, small Xtalk and SSN, because of small swing Stronger reference plane Easy voltage scaling LPDDR4 LVSTL I/O Power by Interfaces VDDQ VOH (mw/gbps/pin) % 40% CTT POD_VDDQ LVSTL_VSSQ DDR3 DDR4 LPDDR4 12 / 22

13 LPDDR4 3.2Gbps and Beyond LPDDR4 LVSTL enables stable 3.2Gbps with 70% UI Initial SI study result shows prominent 4.3Gbps with 60% 350mV swing Further enhancement by reducing trace length, optimizing channel - SOC/PKG/DRAM and lower Cio 3.2Gbps Data Eye Diagram (ODT=60ohm) 4.3Gbps Data Eye Diagram (ODT=60ohm) Over 70% 218 Over 60% 140 Source : Samsung 13 / 22

14 Close Collaboration for Timing Closure Less than half of UI & Less than 1/3 of Amplitude Accurate simulation Board level verification Set level optimization Verification/test/FA tools required LPDDR3-1600Mbps LPDDR3-1866Mbps LPDDR4-3200Mbps [Real scale] 14 / 22

15 Training schemes I/O signal timings are optimized through training schemes that compensate system variations Scheme CA Training DQ Read Training ZQ Calibration Write Leveling Write Training (Write/Read DQ FIFO) VREF Training Purpose Align CA bus inputs to the CLK center Train the DQ outputs Calibrate the Output Driver Strength Align DQS inputs to the CLK Align Data inputs to the DQS Train the VREF level 15 / 22

16 Power-efficiency Enhanced Architecture Core Power reduction by adopting advanced architectures with low power attributes Low Power 32-bit Architecture Access Granularity & Page-size/Ch BL8 x32 32Byte LPDDR3 : Activated Page 4KB(1Kx32) BL16 x16 32Byte x16 LPDDR4 : Activated Page 2KB(1Kx16) ~20% IDD4 reduction ~10% IDD0 reduction 16 / 22

17 Power Efficiency by DRAM Technology More than 40% power efficiency improvement by adopting new architecture, new circuitry and low VDD mw/gb DDR4-40% ODT I/O Core Source : Samsung LP3_1600 LP3_1866 LP3_2133 LP3_4Ch LP4 WIO2 12.8GB/s 14.6GB/s 17GB/s 25.6GB/s 17 / 22

18 Power Saving with Advanced Technology LPDDR4 consumes less power than LPDDR3 for performing some tasks Current Active LPDDR3 Standby Time 18 / 22

19 Power Saving with Advanced Technology LPDDR4 consumes less power than LPDDR3 for performing some tasks Current Active LPDDR3 LPDDR4 Standby Time << 19 / 22

20 LPDDR4 positioning Possibility to expand market acceptance with its high Bandwidth and low Power characteristics Computing Power Applications HPC Solutions DDRx userver DDRx DT/NB DDRx/LP3 Form-factor Power Tablet Power Performance Smartphone /Feature Phone LPDDRx 20 / 22 LPDDRx Time

21 LPDDR4 positioning Possibility to expand market acceptance with its high Bandwidth and low Power characteristics Computing Power Applications HPC Solutions DDRx DDRx Bandwidth TCO userver DDRx DT/NB DDRx/LP3 Form-factor Power DDRx/LP4(?) Tablet Power Performance Smartphone /Feature Phone LPDDRx 21 / 22 LPDDRx LPDDRx Time

22 New Technology is just Around the Corner Expect LPDDR4 production in Industry (Est.) Definition Evaluation Production 22 / 22

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