LSISAS1064 LSI, LSISAS1064 Datasheet - Page 43

• Manufacturer Part Number: LSISAS1064
• Manufacturer: LSI

Specifications of LSISAS1064

• Lead Free Status / RoHS Status: Not Compliant

2.4
SAS Functional Description
The LSISAS1064 provides four SAS/SATA phys. Each phy can form one
side of the physical link in a connection with a phy on a different
SAS/SATA device. The physical link contains four wires that form two
differential signal pairs. One differential pair transmits signals, while the
other differential pair receives signals. Both differential pairs operate
simultaneously, and allow concurrent data transmission in both the
receive and the transmit directions.
attached with a physical link.
Figure 2.2
Phys are contained within ports. A port can contain a single phy or can
contain multiple phys. A narrow port contains a single phy, while a wide
port contains multiple phys. The LSISAS1064 supports wide ports that
contain up to four phys. Any of the LSISAS1064 ports can combine to
form a wide port. Since each phy within a wide port can transmit data at
3.0 Gbit/s SAS, increasing the number of phys in a port increases the
data transfer rate. Combining the four phys on the LSISAS1064 into a
wide port enables bandwidths of up to 12.0 Gbits/s.
A link between two narrow ports is a narrow link. A link between two wide
ports is a wide link.
The wide link contains three phys in each port.
SAS Functional Description
Copyright © 2003–2005 by LSI Logic Corporation. All rights reserved.
transmitter
receiver
Phy
Transceiver
Transceivers within a Phy
Figure 2.3
TX+
TX-
illustrates a narrow link and a wide link.
RX-
RX+
Figure 2.2
Transceiver
transmitter
receiver
Phy
shows two phys that are
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