８２
Signal
Pin#
Description
I/O
Note
S
SATA1_TX-
B16
B17
Serial ATA channel 1, Transmit output differential pair.
Module has integrated AC Coupling capacitor
Carrier Board:
Connect to SATA1 Conn pin 2 TX+
Connect to SATA1 Conn pin 3 TX-
N/C if not used.
O SATA
SATA_ACT#
A28
Serial ATA activity LED. Open collector output pin driven
during SATA command activity.
Module has integrated PU resistor
Carrier Board:
Connect to LED and current limiting resistors 250 to 330 Ω
to 3.3V
N/C if not used.
I/O 3.3V
CMOS
Able
to
drive
10
mA
Notes:
2.9.2 SATA Routing Guidelines
SATA Insertion Loss Budget
The Serial ATA source specification provides insertion loss figures only for the SATA cable.
There are several cable types defined with insertion losses ranging from 6 dB up to 16 dB.
Cross talk losses are separate from material losses in the SATA specification.
The COM Express SATA Insertion loss budgets presented below represent the material losses and do
not include cross talk losses. The COM Express SATA Insertion loss budgets are a guideline: Module
and Carrier Board vendors
should not
exceed the values shown in the tables below.
Figure 24
: SATA Insertion Loss Budge
