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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 Symbol 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 width 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 width 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 -
Note s:
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