Eye diagram, Figure 46: receiver (rx) eye diagram specification, Table 27: receiver (rx) eye diagram specification – Achronix Speedster22i SerDes User Manual
Page 110
Parameter
Description
Min
Typ
Max
Unit
V
RX-SENS
Receiver Input Voltage Sensitivity Under the
Following Conditions:
•
50inch of FR4
•
6.25Gbps
•
PRBS7 data pattern
40
50
mV
diff-
pkpk
T
RX-DDJ
Receive Input Signal Data Dependant Jitter
(Inter-Symbol Interference).
1
UI
pkpk
T
RX-TJ
Receive Input Signal Total Jitter (Inter-Symbol
Interference).
1
UI
pkpk
N
GPLL
F3dB cutoff frequency for the 1
st
Order High-
Pass Jitter Measurement Filter.
Defined as the ratio of the F
3DB
cutoff
frequency, to the data rate
1667
F
BAUD
/
F
GPLL
Eye Diagram
This section describes the RX eye diagram specifications of the SerDes. The specifications
include required input voltage swing and receiver jitter tolerance requirements. The eye
template used is shown in “Figure 46: Receiver (RX) Eye Diagram Specification”.
Figure 46: Receiver (RX) Eye Diagram Specification
Table 27: Receiver (RX) Eye Diagram Specification
Standard
X1 (UI)
X2 (UI)
2xV
p-min
(mV)
2xV
p-max
(mV)
PCIe 1.0
0.3
0.5
175
1200
PCIe 2.0
0.3
0.5
120
1200
sGMII
0.25
0.5
675
1725
GigE
0.355
0.5
200
2000
XAUI
0.325
0.4
200
1600
OIF CEI 6G – SR
0.3
0.5
125
750
110
UG028, July 1, 2014