Marvel 88F6281 User Manual
88F6281
Hardware Specifications
Hardware Specifications
Doc. No. MV-S104859-U0 Rev. E
Copyright © 2008 Marvell
Page 120
Document Classification: Proprietary Information
December 2, 2008, Preliminary
8.7.2
PCI Express Interface Electrical Characteristics
8.7.2.1
PCI Express Interface Driver and Receiver Characteristics
Table 66: PCI Express Interface
Driver and Receiver Characteristics
Description
Sym bol
Min
Max
Units
Notes
Baud rate
BR
Gbps
-
Unit interval
UI
ps
-
Baud rate tolerance
Bppm
-300.0
300.0
ppm
2
Differential peak to peak output voltage
VTXpp
0.8
1.2
V
-
Minimum TX eye w idth
TTXeye
0.75
-
UI
-
Differential return loss
TRLdiff
10.0
-
dB
1
Common mode return loss
TRLcm
6.0
-
dB
1
DC differential TX impedance
ZTXdiff
80.0
120.0
Ohm
-
Differential input peak to peak voltage
VRXpp
0.175
1.2
V
-
Minimum receiver eye w idth
TRXeye
0.4
-
UI
-
Differential return loss
RRLdiff
10.0
-
dB
1
Common mode return loss
RRLcm
6.0
-
dB
1
DC differential RX impedance
ZRXdiff
80.0
120.0
Ohm
-
DC common input impedance
ZRXcm
40.0
60.0
Ohm
-
Notes:
General Comment: For more information, refer to the PCI Express Base Specification, Revision 1.1, March, 2005.
1. Defined from 50 MHz to 1.25 GHz.
2. Does not account for SSC dictated variations.
Driver parameters
Receiver parameters
2.5
400.0