IEI Integration ICE-DB-9S - Manual (Page 84)

Page 71
ICE Module
4.11 LAN (Local Area Network)
All COM Express modules provide at least one LAN port with the minimum capability
of 10/100BaseTx Ethernet and optional 10/100/1000BaseT Gigabit Ethernet compliant
to the IEEE 802.3ab specification.
The LAN interface of the COM Express module consists of 4 pairs of low voltage
differential pair signals designated from 'GBE0_MDI0' (+ and -) to 'GBE0_MDI3' (+ and
-) plus additional control signals for link activity indicators. These signals can be used
to connect a 10/100/1000BaseT RJ-45 connector with integrated or external isolation
magnetics to the carrier board. The corresponding LAN differential pair and control
signals can be found on the modules connector rows A and B.
4.11.1 Signal Description
Table 4-20 shows COM Express Ethernet signals, including pin number, signals, I/O,
power plane, terminal resistors, damping resistors and descriptions.
Table 4-20: Ethernet signals description
Pin Signal I/O Description
A13
A12 GBE0_MDI0+
GBE0_MDI0-
I/O
Media Dependent Interface (MDI) differential pair 0. The
MDI can operate in 1000, 100, and 10Mbit/sec modes.
A10
A9 GBE0_MDI1+
GBE0_MDI1-
I/O
Media Dependent Interface (MDI) differential pair 1. The
MDI can operate in 1000, 100, and 10Mbit/sec modes.
A7
A6 GBE0_MDI2+
GBE0_MDI2-
I/O
Media Dependent Interface (MDI) differential pair 2. The
MDI can operate in 1000, 100, and 10Mbit/sec modes.
A3
A2 GBE0_MDI3+
GBE0_MDI3-
I/O
Media Dependent Interface (MDI) differential pair 3. The
MDI can operate in 1000, 100, and 10Mbit/sec modes.
A14 GBE0_CTREF REF
Reference voltage for carrier board Ethernet channel 0
magnetics center tap. The reference voltage is
determined by the requirements of the module's PHY
and may be as low as 0V and as high as 3.3V.
A8 GBE0_LINK#
O 3.3V OD
CMOS
Ethernet controller 0 link indicator, active low.
A4 GBE0_LINK100#
O 3.3V OD
CMOS Ethernet controller 0 100Mbit/sec link indicator, active
low.
A5
GBE0_LINK1000
# O 3.3V OD
CMOS Ethernet controller 0 1000Mbit/sec link indicator, active
low.
B2 GBE0_ACT#
O 3.3V OD
CMOS
Ethernet controller 0 activity indicator, active low.