DDR4 DIMM Slot Compliance Interposer

Address Command and Control Validation
  • Cost Optimized visibility
  • Address, Command and Control timing with Command Decode
  • Passive 284-pin DIMM Slot Interposer
    • 288 pin version also available
  • Designed for DDR4-2400+
  • Automated Logic Analyzer Setup for fast Time-to-Data
  • Compatible with Nexus Memory Compliance Analyzer (MCA) Instrument

Nexus Technology recommends DDR4 slot interposers for applications where the customer must have the greatest flexibility for probing of different DDR4 DIMMs.

This interposer is an extender design and does not require a dedicated DIMM slot. The logic analyzer connects above the standard DIMM height so that there is no mechanical interference with adjacent DIMMs.

This is a passive interposer with no added buffers to conceal system performance.

Software

This DDR4 DIMM Slot Compliance interposer comes with logic analyzer setup software and DDR4 protocol decode software.

Logic Analyzer Setup

The logic analyzer setup software (Tektronix refers to these as 'Support Packages') provides a quick setup of the logic analyzer channels and logic analyzer clocking/acquisition parameters. This software also provides disassembly of the DDR4 transactions (Command, Address and Control only) for easy display of the DDR bus cycles and logic analyzer settings for triggers and filters. 

 

Analog Validation

A powerful analog validation feature is the Tektronix Logic Analyzer's Analog Mux capability.  This provides the ability to see any channel of the DDR4 bus in seconds on an oscilloscope. This is invaluable information which allows analysis within minutes as to the status and behavior of the DDR4 bus. No extra probing is required to gain analog incite of the DDR4 bus. This information can be pushed back into the logic analyzer software and viewed in a wave form window along with the state or timing data using the iView Feature.

 

Tektronix discusses some of these topics in more detail in the application note, Debugging Timing Problems with a Logic Analyzer.

Digital Validation

Logic analyzer setup software (TLA support package) included with this product acquires/reconstructs the command/address bus and acquires/reconstructs the read/write data from the data bus. The software also decodes and displays the bus command sequence, shows the valid read/write data and provides easy DDR command sequence triggering to quickly capture relevant data.

The optional DDR4 Memory Compliance Analysis package enables and automates measurement of the DDR4 bus activity for fast and easy functional testing and extensive compliance, statistical, and performance analysis.

Execution Validation

These products optionally include the DDR4 Memory Compliance Analysis software package. This software package performs advanced command sequence & timing compliance analysis. It also provides statistical information and global bus activity to quickly give the user an overview of the DDR4 bus activity without having to revert to a listing or waveform window.

  • Extensive JEDEC DDR4 Compliance Analysis
  • Quick and Easy Setup w/No Calibration Required
  • Automated Acquisition and Measurement
  • Powerful in-application graphical and tabular analysis results
  • Memory controller & JEDEC parameters predefined
  • Quickly navigate through multiple acquisitions

Sample Point Analysis

The DDR4 specification calls out skew on a the DQ data bus on a per byte basis, relative to the DDR clock.  Design of high speed interconnect will also introduce skew on a per bit basis.  In order for the logic analyzer to capture data accurately, the sample points must be set in consideration of this byte to byte and bit to bit skiew. When the data bus activity is inadequate for automated sample setting, iCiS can be used to graphically display the signal eyes on a per group or per signal basis, and then graphically select the optimum sample point voltage threshold and timing offset

Hardware/Software Configurations

 

DDR Speed Acquisition Mainframe Required Module(s) Required Probes Required**
  • DDR4-2133
Address, Command, Control TLA7000 Series 1 - TLA7BB2/3/4 1.4GHz

 

Product Configuration Table

 

Nomenclature Nexus Probes Included? Pin Count Nexus Hardware Included Nexus Software Included
NEX-DDR4INTR-CMPL No 284 Pin
  • 1 - DDR4 DIMM Slot Compliance Interposer
  • 1- TLA Setup & Protocol Decode Support Package
NEX-DDR4INTR288-CMPL No 288 Pin
  • 1 - DDR4 288 pin DIMM Slot Compliance Interposer
  • 1- TLA Setup & Protocol Decode Support Package
 

More Information

Mechanical: 

Ordering Information
Please send quote request to quotes@nexustechnology.com
Purchase orders can be submitted to orders@nexustechnology.com
Purchase orders can also be faxed to 877-595-8118