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2.9 SATA
Support for up to two SATA ports is defined on the COM Express A-B connector. Support for a minimum
of 0 port is required for Module Type 7.
1.5Gb/s), SATA-300 (revision 2.0, 3Gb/s), and SATA-600 (revision 3.0, 6Gb/s) devices.
Express Specification addresses both in the section on insertion losses.
SATA devices can be internal to the system or external. The eSATA specification defines the connector
used for external SATA devices. The eSATA interface must be designed to prevent damage from ESD,
comply with EMI limits, and withstand more insertion/removals cycles than standard SATA. A specific
eSATA connector was designed to meet these needs. The eSATA connector does not have the "L"
shaped key, and because of this, SATA and eSATA cables cannot be interchanged.
2.9.1 SATA Signal Definitions
Table 27: SATA Signal Definitions
Signal
Pin#
SATA0_RX+
A19
SATA0_RX-
A20
SATA0_TX+
A16
SATA0_TX-
A17
SATA1_RX+
B19
SATA1_RX-
B20
Serial ATA links for support of existing SATA-150 (revision 1.0,
Description
Serial ATA channel 0, Receive input differential pair.
Module has integrated AC Coupling capacitor
Carrier Board:
Connect to SATA0 Conn pin 6 RX+
Connect to SATA0 Conn pin 5 RX-
N/C if not used.
Serial ATA channel 0, Transmit output differential pair.
Module has integrated AC Coupling capacitor
Carrier Board:
Connect to SATA0 Conn pin 2 TX+
Connect to SATA0 Conn pin 3 TX-
N/C if not used.
Serial ATA channel 1, Receive input differential pair.
Module has integrated AC Coupling capacitor
Carrier Board:
Connect to SATA1 Conn pin 6 RX+
Connect to SATA1 Conn pin 5 RX-
N/C if not used.
８１
The COM
I/O
Note
I SATA
O SATA
I SATA
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