APDS Wizard v4 for Nexxim/Designer 4.0 Specially optimized for DDR2/3 SI. Ansoft Korea Team

Transcription

1 APDS Wizard v4 for Nexxim/Designer 4.0 Specially optimized for DDR2/3 SI Ansoft Korea Team

2 APDS Wizard v4 All-Renewed, Enhanced Wizard. Version 4 means this new wizard would work with Designer/Nexxim v4

3 V4 : New Features & Upgraded New Feature! - Specification & Eye Report - Spec & Margin Mask - Eye Analyzer - DDR2/3 Spec Calculator Upgraded! - Optimized perfectly to new Designer/Nexxim v4.0 scripts - More stable IBIS Analyzer - All-new GUI for more intuitive handling - Normal mode & burst mode at PRBS source - Improved I/O buffer Enable handling - Swapping Driver & Receiver by one click - Multiple SSN input (Driver + Receiver) - Simulation with Input jitter - Support HSPICE & Nexxim S element

4 New! Specification & Eye Report Apply Specification Spec & Margin Mask If simulation is finished with specification check, SI Result & Mask would be generated automatically. Setup/Hold Margin Report

5 New! Spec & Margin Mask Setup Margin Hold Margin Multi Mask Setup time spec. Jitter Area Hold time spec.

6 New! Eye Analyzer Eye Analyzer can analyze eyediagram & make new report / mask independently. It would be useful for re-analyzing after modifying schematic created by Wizard

7 New! DDR2/3 Spec Calculator Automatic DDR2/3 spec Calculation based on JEDEC standard

8 Upgraded! Enhanced IBIS Analyzer * Improved by test with many kind of IBIS files IBIS file path Component Model Selector IBIS Buffer Model IBIS information format was arranged

9 Upgraded! Intuitive GUI Separated IBIS & ports for Driver & Receiver Open ports list to be applied to appropriate port Source Setup Spec Setup Transient Setup

10 Upgraded! Enhanced Flexibility APDS wizard v4 was specially optimized for DDR2/3 SI simulation. However, This new wizard can not only apply to DDR2/3, but also can apply any other SI problem by enhanced flexibility 1. DDR2/3 Analyzer mode with Eye-Analyzer (with SSN) - Assign single/differential DQS - Apply DDR2/3 specification to eye diagram - Assign VRM/Vdd ports 2. Dataline Analyzer mode with SSN (= old APDS Wizard) - Not assign DQS - Assign VRM/Vdd ports 3. Simple Dataline Analyzer mode without SSN - Not assign DQS - Not assign VRM/Vdd ports

11 APDS wizard v4 Guide

12 Load PCB file Load PCB sp file Open port list from sp file Assign Ports * APDS wizard v4 supports HSPICE & Nexxim Sline model

13 Check & move ports 1. Check ports at open port list to move If want to back to open port list, Check ports and click button 2. Click button to assign checked ports from open port list

14 DQ & DQS port assign Normal data ports for single DQ Strobe ports for DQS Auto-detected simulation mode depend on number of Strobe ports 0. No strobe port (= blank) : only data line simulation, like as old Wizard. 1. Assign 1 strobe port : It works as single strobe mode 2. Assign 2 strobe ports : It works as differential strobe mode * In order to analyze eye, It must exist 1 or 2 strobe ports.

15 VRM & VDD port assign 1. If Vdd group port exist, external Vdd would be applied with SSN. (Internal power at IBIS buffer = off ) 2. If blank, It would work as Internal power mode automatically. (Internal power at IBIS buffer = on ) Assign VRM port (clear DC power) APDS Wizard v4 support SSN power input to both Driver/Receiver

16 IBIS Setup 1. Select IBIS file 2. Select Component 3. Select Model Selector (If model selector exist, optional) 4. Select Buffer Model * It s very important to select proper component & model for successful simulation.

17 Swap Driver & Receiver Changed! Click Swap button If want to change read & write condition, just click swap button. * After swapping, each IBIS model should be re-assigned to proper one.

18 Off-Die Term Setup (optional) If need to add external termination for all Receiver port, Check & setup Off-Die Term. Off-Die Term on Receiver in Schematic

19 Source Setup Input data rate Automatically calculated bit width Select DQ data mode Normal (PRBS) : Different seed at each data PRBS for real operation (default) Even (worst SSN) : Same seed at all data PRBS for worst SSN condition Input jitter at clock source for strobe (DQS)

20 Define & Apply Specification If checked, Wizard would analyze eye diagrams as defined specification If need to apply both AC & DC spec. Check Add dvi_ac Capable to input manually. DDR2/3 Spec Calculator Automatic DDR2/3 specification input based on JEDEC standard AC Threshold (dvi_ac) Setup Time Hold Time DC Threshold (dvi_dc)

21 Save & Load configuration APDS Wizard v4 support saving & loading all configuration. Configuration file (*.aw) would be created as text file with comment. User could read & modify it.

22 Simulation Transient Setup Stop time would be defined automatically by bit width. (If need, type manually) If checked, It generates only schematic Once simulation was finished, Result button would be activated to check recent report. If all setup was done, Click Start button. Eye Analyzer Analyze eye result independently.

23 Schematic Generation Example : DDR2 SI with differential strobe DQS DQ RDQ RDQS 1 Byte Lane = 8 single DQ, 1 differential DQS (or 1 single)

24 SSN & DQS Cross Result Ansoft Corporation SSN Data wizard1 Curve Info V(SSN_Driver) Transient 1.82 V(SSN_Driver) [V] Time [ns] DQS Vref DQS_B

25 Eye Result

26 Eye Report After simulation, Setup/Hold margin at each line would display Save results as CSV format