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Intel PCI User Manual

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8
Software Developer’s Manual
Architectural Overview
2.2
External Architecture
 shows the external interfaces to the 82546GB/EB.
Figure 2-1. 82546GB/EB External Interface
 shows the external interfaces to the 82545GM/EM, 82544GC/EI, 82540EP/EM, and 
82541xx.
Figure 2-2. 82545GM/EM, 82544GC/EI, 82540EP/EM, and 82541xx External Interface
MDI
Interface B
1000Base-T PHY Interfaces
     Design for 
Test Interface
       External 
TBI Interface
LEDs
LEDs
      Software
Defined Pins
Software
Defined Pins
EEPROM
Interface
SMBus
Interface
MDI
Interface A
Flash Interface
MDIO
GMII/
MII
MDIO
GMII/
MII
Device
Function 0
MAC/Controller
(LAN A)
Device
Function 1
MAC/Controller
(LAN B)
PCI (64-bit, 33/66 MHz)/PCI-X (133 MHz)
10/100/1000
      PHY
10/100/1000
      PHY
1000Base-T PHY Interface
     Design for 
Test Interface
       External 
TBI Interface
(
82545GM/EM only
)
LEDs
      Software
Defined Pins
EEPROM
Interface
SMBus
Interface
MDI
Interface
Flash Interface
MDIO
GMII/
MII
Device
Function 0
MAC/Controller
PCI (64-bit, 33/66 MHz)/PCI-X (133 MHz)
Note: 82540EP/EM and 82541xx do not support PCI-X; 82544GC/EI and 82541ER do not support SMBus interface
10/100/1000
      PHY