Eye Diagram Timing

  1. Using eye mask to judge the violation.

  2. User input: Input Data: VdiVW_Total and TdiVW_Total.

  3. Tool auto-creates Target vs. Strobe (i.e., DQ vs. DQS) eye diagram.

  4. Base on the Strobe cross-point, Vref, VdiVW and TdiVW to create the Rx mask and report the violations.

  5. Report TdiPW, Tr, Tf and SRIN_diVW for each DQ.

  6. Report Eye-width and Eye-Height @ BER=1e-16.

DQ Receiver Compliance Mask

DDR4 DQ Eye Diagram Timing Example

  1. Classify and group nets in presetting, fly-by Vref automatically calculates by net group.

  2. Input VdiVW_Total and TdiVW_Total.

  3. Report the DDR4 DQ Eye-diagram related parameters.

Timing Eye Diagram Tab