DDR5

Overview

This Cadence® Verification IP (VIP) supports the JEDEC® Memory Device DDR5 SDRAM standard. It provides a highly capable compliance verification solution that supports simulation and formal analysis, making it applicable to intellectual property (IP), system-on-chip (SoC), and system-level verification. The VIP for DDR5 SDRAM is compatible with the industry-standard Universal Verification Methodology (UVM), runs on all leading simulators, and leverages the industry-standard Cadence Memory Model core architecture, interface, and use model.


The DDR5 standard is the next generation of DRAM device memory standard with many improvements in performance, reliability, and power saving over the previous generation of DRAM devices, DDR4. DDR5 addresses industry demand with increased bandwidth, capacity, power-saving features, and with more reliability through CRC and ECC.

 

Supported specification: 

The VIP for DDR5 supports the JEDEC JESD79-5 specification.  

 

Product Highlights

  • Thousands of protocol and timing checkers to easily catch design bugs

  • Hundreds of predefined configurations based on specific memory vendors part numbers datasheets or generic JEDEC definitions available on ememory.com  

  • Transaction and memory callbacks for all protocol, model states, and device memory events

  • Ability to optionally skip initializations, refresh, or dynamically change configuration parameters

  • Packet tracker creation for easy debugging 

  • Extensive functional coverage in SystemVerilog 

  • Integrated with the DFI DDR5 solution for IP-level verification

  • Plug-and-play connectivity to System Performance Analyzer for subsystem or SoC performance verification 

  • Support testbench language interfaces for SystemVerilog, UVM, OVM, and SystemC®

  • Support of passive mode, meaning VIP only monitors, checkers, and coverage are enabled 

  • Built-in functional coverage mapped to spec annotated vPlan using Cadence vManager™ Verification Management for efficient verification planning 

 

Protocol Features

The following table describes key features from the specification that are implemented in the VIP.

Feature Name
Description
Speeds

3200, 3600, 4000, 4400, 4800, 5200, 5600, 6000, and 6400

Density 8Gb, 16Gb, 24Gb, 32Gb, and 64Gb
Data Widths

x4, x8, and x16

Core DRAM Functionality
  • Reset and Initialization
  • Read/ Write and Write Pattern (All Burst Lengths including BL32, Type, Order)
  • Self Refresh, Power Down, and Maximum Power Saving Mode (MPSM)
  • Temperature Sensor (including support for Temperature Based Self Refresh)
  • Per Dram Addressability (PDA)
  • Write command features (tDQS2DQ Offset,  Write Data Mask, twr timing changes, etc)
Training Modes
  • Training Modes (Read Training Pattern, Read Preamble Training Mode, CATM, CSTM, VrefCS, VrefCA, Internal and External Write Leveling Training Mode, etc)
  • ZQ Calibration Commands
  • DQS Interval Oscillator
Commands

Support of all DDR5 JEDEC Spec defined Commands: MRW, MRR, ACT, WrP, WrPA, Wr, WrA, Rd, RdA, VrefCA, VrefCS, RFM, REF, SRE, SREF, PDE, PDX, MPC, and PRE

Signal Integrity and Routing 
  • Post Package Repair (PPR)
  • On-Die Termination (ODT)
  • CA_ODT Strap Operation
  • CAI, MIR, CA_ODT Pin Support
  • Loopback Mode
DRAM Timings 
  • Timing Parameters by Speed Grades, e.g., bus timings (setup, hold, pulse width checks)
  • Command Spacing checks
  • DDR5 timings rounding algorithm
Data Integrity
  • ECC and ECS Modes
  • CRC generator and checks
Command Decoding
  • Single-cycle and two-cycle commands with support for both targeted and non-targeted commands
  • 1N and 2N Mode support
Programmable Configurations

Programmable Pre/post and Interamble, CL/CWL, /tdllk/tccdl/dllreset

Bank Groups
  • Supports 8 or 4 bank groups
  • Modeling the concept and the timing associated with back-to-back access to the same and different bank groups
Refresh Options
  • Normal 1X Refresh Mode and Fine Granularity 2X Refresh Mode
  • 1X Refresh Rate, 2X Refresh Rate
Additional Features
  • Support of Board Delays for All the Pins
  • Support for Inter Rank ODT and Command Spacing Checks
  • Support for Active Byte Lane Mask for X16 device
Verification Flows
  • Query Select Verification Flow
  • Random Config Verification Flow

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