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
38 917717 Rev C
The local minimum must be greater than or equal to the minimum limit. The local maximum must be less
than or equal to the maximum limit.
VIL(ac ), maximum AC input logic low
Measure the local minimum value from VREF to VREF of the low 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.
VIL(dc), m inimum DC input logic low
Measure the local minimum and maximum values from the first VIL(ac)max crossing point to the time
corresponding to VIL(dc)max crossing a 1V/ns slewrate slope to VREF. If multiple pulses are measured,
take the lowest, respectively the highest, number as the worst case.
The local minimum must be greater than or equal to the minimum limit. The local maximum must be less
than or equal to the maximum limit.
Read Bursts (Outputs)
SRQ (Output Slew Rate)
SRQr and SRQf
Apply to all output signals.
The output slew rate is measured from VOL(ac) to VOH(ac) for the rising edge and from VOH(ac) to
VOL(ac) for the falling edge
Timing Tests
Rea d B urs ts
tDQSQ, DQS-DQ Skew f or DQ S and Ass oc iate d DQ Signa ls
Maximum skew between the DQS line and the associated DQ line within a read burst