User Manual
Table Of Contents
- Introduction TO QPHY-DDR3
- Signals measured
- DDR3 MEASUREMENT PREPARation
- Basic Functionality
- Using Qualiphy DDR3
- QualiPHY Compliance Test Platform
- QPHY-DDR3 Test Configurations
- 1) Clock tests DDR3-1333 (1 Probe)
- 2) CKdiff-DQse-DQSdiff 1333 Write Burst (3 Probes)
- 3) CKdiff-DQse-DQSdiff 1333 Read Burst (3 Probes)
- 4) Eye Diagram (3 Probes Debug)
- 5) Eye Diagram with CS Enabled (4 Probes Debug)
- 6) CKDiff-DQse-DQS-ADD/CTRLse (4 Probes Debug)
- 7) CKdiff-DQse-DQSp-DQsn (4 probes test, each DQS signal probed single ended)
- 8) CKp-CKn-DQse-DQSdiff (4 probe test, each CK signal is probed single ended)
- 9) Vref tests
- D1) Demo of All Tests
- QPHY-DDR3 Variables
- QPHY-DDR3 Limit Sets
- QPHY-DDR3 Tests
- Clock Tests
- tCK(avg), Average Clock Period
- tCK(abs), Absolute Clock Period
- tCH(avg), Average High Pulse Width
- tCL(avg), Average Low Pulse Width
- tCH(abs), Absolute High Pulse Width
- tCL(abs), Absolute Low Pulse Width
- tJIT(duty), Half Period Jitter
- tJIT(per), Clock Period Jitter
- tJIT(cc), Cycle to Cycle Period Jitter
- tERR(n per), Cumulative Error
- Eye Diagram
- Electrical Tests
- Timing Tests
- Four Probe tests measurements using ADDR/CTL
- Clock Tests
QPHY-DDR3 Software Opti on
917717 Rev C 37
For differential signals (e.g. CK - CK#) slew rate for rising edges is measured from Vihdiffmin to
Vihdiffmax. This test is informational only.
Figure 16. AC input test signal waveform [JE SD79-3D figure 94]
Logic Levels
VIH(ac), maximum AC input logic high
Measure the local maximum value from VREF to VREF of the high pulse histogram. If multiple pulses are
measured, take the lowest number and the highest number as the worst cases.
The lowest number must be greater than or equal to the minimum limit and the highest number must be
less than or equal to the maximum limit.
VIH(dc), minimum DC input logic high
Measure the local minimum and maximum values from the first VIH(ac)min crossing point to the time
corresponding to VIH(dc)min crossing a 1V/ns slewrate slope to VREF. If multiple pulses are measured,
take the lowest, respectively the highest, number as the worst case.