Express-BD7
Pinouts and Signal Descriptions
13
3.3. AB Signal Descriptions
3.3.1.
Network Controller Sideband Interface (NC-SI)
Signal
Pin
Description
I/O
PU/PD
Comment
NCSI_CLK_IN B91
Clock reference for receive, transmit and
control interface
I 3.3VSB
PD 10k
NCSI_RXD[1:0]
B92
B93
Receive Data (from NC to BMC)
O 3.3VSB PU 10k
3.3VSB
PU 10k that aligns with
LAN chip specification
NCSI_TXD[1:0]
B95
B96
Transmit Data (from BMC to NC)
I 3.3VSB
PU 10k
3.3VSB
NCSI_CRS_DV B94 Carrier Sense/Receive Data valid to MC,
indicating that the transmitted data from NC to
BMC is valid
O 3.3VSB PD 10k
PU 10k that aligns with
LAN chip specification
NCSI_TX_EN
A84
Transmit enable
I 3.3VSB
PD 10k
NCSI_RX_ER
B89
Receive error
O 3.3VSB
NCSI_ARB_IN B98
Network
Controller
hardware arbitration input
I 3.3VSB
Left floating on module,
that aligns with LAN
chip specification
NCSI_ARB_OUT B99 Network
Controller
hardware arbitration output O 3.3VSB
3.3.2. Gigabit
Ethernet
Gigabit Ethernet
Pin
Description
I/O
PU/PD
Comment
GB
GBE0_MDI0-
GB
GBE0_MDI1-
GB
GBE0_MDI2-
GB
GBE0_MDI3-
A13
A12
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:
1000BASE-T
100BASE-TX
10BASE-T
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
Shares same
source as A8
GBE0_LINK#
A8
Gigabit Ethernet Controller 0 link indicator, active low.
O 3.3VSB
Shares same
source as B2
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
NC
pin
GBE0_SDP
A49 Gigabit Ethernet Controller 0 Software-Definable Pins.
Can also be used for IEEE1588 support such as a
1pps signal.
I/O
3.3VSB
PU 10k
3.3VSB
PU 10k that aligns
with LAN chip
specification