Lsi SAS3041E User Manual download pdf (Page 18)

1-4 Introduction

1.3 PCI Performance

LSI PCIe to SAS host adapter boards support the PCI Express interface.

The following lists are of their features.

1.3.1 PCI Express Features

The PCI Express features of the LSI PCIe to SAS host adapters include:

• Provides four (boards using LSISAS1064E) or eight (boards using

LSISAS1068E) PCI Express phys

• Supports a single-phy (1 lane) link transfer rate up to 2.5 Gbits/s in

each direction

• Supports x8, x4, and x1 link widths

• Automatically downshifts to a x4 link width if plugged into a x4

connector or into a x8 connector that is wired as a x4 connector

• Provides a scalable interface

– Single-lane aggregate bandwidth of up to 0.5 Gbytes/s

(500 Mbytes/s)

– Quad-lane aggregate bandwidth of up to 2.0 Gbytes/s

(2000 Mbytes/s)

– 8-lane aggregate bandwidth of up to 4.0 Gbytes/s

(4000 Mbytes/s)

• Supports serial, point-to-point interconnections between devices

– Reduces the electrical load of the connection

– Enables higher transmission and reception frequencies

• Supports lane reversal and polarity inversion

• Supports PCI Express Hot Plug

• Supports Power Management

– Supports PCI Power Management 1.2

– Supports Active State Power Management (ASPM), including the

L0, L0s, L1 states, by placing links in a power-savings mode

during times of no link activity

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Lsi SAS3041E User Manual Page 18