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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.
- ICE Module 1
- Revision 2
- Copyright 3
- Table of Contents 4
- List of Figures 9
- List of Tables 12
- 1 Introduction 14
- 1.1 Introduction 15
- 1.3 Reference Documents 17
- 2 ICE Module Overview 18
- 2.1 Chapter Overview 19
- 2.2 ICE Specifications 20
- 2.2.1 ICE-9152-R10 21
- Page 16 29
- 2.2.5 ICE-GM45A-R10 29
- 2.2.6 ICE-DB-9S-R10 30
- 2.3 Performance 32
- 3 Pin Assignments 33
- 3.1 Chapter Overview 34
- 3.3 Signal Table Terminology 36
- Page 24 37
- 4 Signal Description and 42
- Routing Guideline 42
- Page 30 43
- 4.1.1 Signal Description 43
- 4.1.3 SDVO 46
- AC Coupling Cap 50
- 4.2 PCI Express 51
- 4.2.1 Signal Description 52
- VCC1.5/1A 54
- Page 42 55
- 4.3 PCI 60
- 4.4.1 Signal Description 64
- Page 54 67
- 4.5.1 Signal Description 67
- from Semtech 72
- 4.6 LVDS 74
- 3.3V(Default) 75
- J_VLVDS1 75
- 4.8 Reference Circuit 78
- 4.9 IDE 79
- IDE Connector 80
- CF Connector 81
- 4.10 TV-Out 82
- +V5_KB_R +V5_KB_RR 90
- 4.13 VGA 92
- 4.14 Miscellaneous 95
- CPU FAN W/FAN Control 97
- SYSTEM FAN W/FAN Control 97
- CLEAR CMOS/Super CAP 98
- 5 PCB Stack and 99
- Power Deliver Design 99
- 5.1 Chapter Overview 100
- 5.2 Microstrip or Stripline 100
- 5.3 PCB Stackup Example 100
- Page 90 103
- T0 T1 T2 T3 T4 T5 T6 T7 T8 105
- AT Power 106
- T0 T1 T2 T3 T4 T5 T6 107
- Chapter 108
- 6.1 Chapter Overview 109
- 6.3 Connector Footprint 111
- 6.4 COM Express Form Factors 112
- 6.5 Heat Spread 113
- Page 101 114
- 6.6 Design Notes 116
- Page 104 117
- A ICE Module Design 120
- Schematic Check List 120
- Page 108 121
- Page 109 122
- Page 110 123
- Page 111 124
- Page 112 125
- B Application Notes 129
- B.1 Terminology 130
- B.2 Updating BIOS Version 130
- Page 119 132
- Page 120 133
- Page 121 134
- 6.7.2 Using DOS Command 134
- Page 122 135
- A.1 RTC Overview 136
- B Reference Carrier 137
- Board Schematic 137
- PCI ROUTING 138
- Cover Page 138
- ATX/AT Power 139
- COMExpress 139
- F119 ICE-DB-9S-R10 140
- IEI ELECTRONICS INC 140
- PCI Clock Buffer 141
- PCIE Clock Buffer 141
- Mini PCI Express 142
- Express Card 142
- PCIEX1_Slot1 142
- PCIEX1_Slot2 142
- D23, REQ#0,GNT#0,INT#AB 145
- 7-Segment LED with Common GND 146
- PCIEX1_Slot3 147
- PCIEX1_Slot4 147
- W83627EHG 150
- FLOPPY(only Device A) 152
- Front_Audio 155
- CD_IN(Reserve) 155
- Audio Rear Jack 156
- Audio Rear Header 156
- SPDIF Connector(Reserve) 156
- COM Module 159
- Express Card Module 159
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