Teledyne LeCroy QPHY-LPDDR2 - Manual (Page 41)

QPHY-LPDDR2 Software Option
QPHY-LPDDR2-OM-G Rev B
41
n = 2 for tERR(2per)
n = 3 for tERR(3per)
n = 4 for tERR(4per)
n = 5 for tERR(5per)
(and so forth until n = 12)
13 ≤ n ≤ 50 for tERR(11-50per)
Measured on both the rising and the falling edge.
Eye Diagram
Write Burst (Inputs)
This is an informational only test that creates the eye diagram of all of the write bursts found in the
acquisition.
Read Burst (Outputs)
This is an informational only test that creates the eye diagram of all of the read bursts found in the
acquisition.
Electrical Tests
Slew Rate
Please refer to section 8.6 of the JESD209-2D for single ended input signals and to section 8.7 for slew
rate for differential signals.
Figure 21. Differential Input Slew Rate Definitions [JESD209-2D figure 111]
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.