cExpress-AL
Pinouts and Signal Descriptions 15
3.3.4. Gigabit Ethernet
Gigabit Ethernet Pin Description I/O PU/PD Comment
GBE0_MDI0+
GBE0_MDI0-
GBE0_MDI1+
GBE0_MDI1-
GBE0_MDI2+
GBE0_MDI2-
GBE0_MDI3+
GBE0_MDI3-
A13
A11
A10
A9
A7
A6
A3
A2
Gigabit Ethernet Controller 0: Media Dependent Interface
Differential Pairs 0, 1, 2, 3. The MDI can operate in 1000,
100, and 10Mbit/sec modes. Some pairs are unused in
some modes according to the following:
1000 100 10
MDI[0]+/- B1_DA+/- TX+/- TX+/-
MDI[1]+/- B1_DB+/- RX+/- RX+/-
MDI[2]+/- B1_DC+/-
MDI[3]+/- B1_DD+/-
I/O
Analog
Twisted pair
signals for
external
transformer.
GBE0_ACT# B2 Gigabit Ethernet Controller 0 activity indicator, active low. O 3.3VSB
GBE0_LINK# A8 Gigabit Ethernet Controller 0 link indicator, active low. O 3.3VSB
GBE0_LINK100# A4
Gigabit Ethernet Controller 0 100Mbit/sec link indicator,
active low.
O 3.3VSB
GBE0_LINK1000# A5
Gigabit Ethernet Controller 0 1000Mbit/sec link indicator,
active low.
O 3.3VSB
GBE0_CTREF A14
Reference voltage for Carrier Board Ethernet channel 1
and 2 magnetics center tap. The reference voltage is
determined by the requirements of the Module PHY and
may be as low as 0V and as high as 3.3V. The reference
voltage output shall be current limited on the Module. In
the case in which the reference is shorted to ground, the
current shall be 250 mA or less.
GND min
3.3V max
Not
supported
(NC pin)
GBE0_SDP A49
Gigabit Ethernet Controller 0 Software-Definable Pin. Can
also be used for IEEE1588 support such as a 1pps signal.
3.3.5. SATA
Signal Pin Description I/O PU/PD Comment
SATA0_TX+
SATA0_TX-
A16
A17
Serial ATA channel 0, Transmit Output differential
pair.
O SATA
AC coupled on
Module
SATA0_RX+
SATA0_RX-
A19
A20
Serial ATA channel 0, Receive Input differential
pair.
I SATA
AC coupled on
Module
SATA1_TX+
SATA1_TX-
B16
B17
Serial ATA channel 1, Transmit Output differential
pair.
O SATA
AC coupled on
Module
SATA1_RX+
SATA1_RX-
B19
B20
Serial ATA channel 1, Receive Input differential
pair.
I SATA
AC coupled on
Module
SATA2_TX+
SATA2_TX-
A22
A23
Serial ATA channel 2, Transmit Output differential
pair.
O SATA Not supported
SATA2_RX+
SATA2_RX-
A25
A26
Serial ATA channel 2, Receive Input differential
pair.
I SATA Not supported
SATA3_TX+
SATA3_TX-
B22
B23
Serial ATA channel 3, Transmit Output differential
pair.
O SATA Not supported
SATA3_RX+
SATA3_RX-
B25
B26
Serial ATA channel 3, Receive Input differential
pair.
I SATA Not supported
(S)ATA_ACT# A28
ATA (parallel and serial) or SAS activity indicator,
active low.
O 3.3V
PU 10k
3.3V
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