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Design Guide 55
Cables and Connectors 8
8.1 Cabling
A Serial ATA device is connected to a host through a direct connection or through a cable. For
direct connection, the device plug connector, shown as (a) and (b) in Figure 21, is inserted directly
into a host receptacle connector, illustrated as (g) in Figure 22. The device plug connector and the
host receptacle connector incorporate features that enable the direct connection to be hot pluggable
and blind mateable.
Table 25. Serial ATA Signal Definitions
Signals Definition Number of pins
GGround1
A+/A- Serial ATA port A differential signals 2
B+/B-: Serial ATA port B differential signals 2
HT+/HT- Host Transmitter differential signals 2
HR+/HR- Host Receiver differential signals 2
DT+/DT- Device Transmitter Differential Signals 2
DR+/DR- Device Receiver Differential Signals 2
Figure 20. Serial ATA Direct Connect
B0426-01
HT+
HT-
G
A+
A-
G
B-
B+
G
HR-
HR+
DR+
Direct Connect
Host Chip, PCB
and connector
DR-
DT-
DT+
G
A+
A-
G
B-
B+
G
Device Chip, PCB
and connector