Intel EP80579 Guide

Intel
®
EP80579 Integrated Processor Product Line May 2010
Order Number: 320068-005US 226
Gigabit Ethernet (GbE) Interface—Intel
®
EP80579 Integrated Processor Product Line
19.7 GbE Serial EEPROM
The GbE MACs use a 4K- bit (256 x 16 bits each) serial EEPROM device for storing
product configuration information. Several EEPROM words are automatically accessed
by the GbE controller after reset to provide pre-boot configuration data before it is
accessed by the host software. The remainder of the stored information is available to
software for storing the MAC addresses and additional configuration information for
three GbE MACs. The EEPROM algorithm programmed into the GbE controllers is
compatible with most commercially available 3.3V Microwire* interfaces, serial EEPROM
devices, with a 256 x 16 organization and a 1 MHz speed rating.
All three controllers share the same EEPROM. A fixed priority arbiter controls access to
the EEPROM where highest priority is given to GbE 0 then GbE 1 and finally GbE 2.
19.8 Wake on LAN
Two types of wake-up mechanisms are supported:
• Advanced Power Management (APM) Wake-up
•ACPI Power Management Wake-up
When so configured, if a wake-up packet is received, the GBE_PME_WAKE signal will be
asserted. The GBE_PME_WAKE signal of all three GbE MACs are wired-or together and
brought to the external pin GBE_PME_WAKE. The user must externally connect this pin
to the PME_N input pin.
19.9 GbE RComp
The GbE RCOMP (Resistive COMPensation) circuitry dynamically compensates the GbE
I/O output drivers for variations in operating conditions due to process, temperature,
voltage and PCB layout. These variations are measured through a resistive mechanism
in two special I/O pads.
Table 86. GbE RGMII Receive Path Data\Control Routing Guidelines
Parameter Routing Constraints
Routing Layer Stripline Microstrip
Reference Plane Ground Reference
Board Trace Impedance 50 Ω 50 Ω
Trace Width 4.5mils (L3/L8) 5.5mils (L1/L10)
Data\Control Spacing (e2e) 12 mils (min) 18 mils (min)
PHY Data\Control Rx Breakout Length
(LD\C_Brk_out_tx)
0.5 inch (max) 0.5 inch (max)
Data\Control Rx Board Length
(LD\C_Brd_route_rx)
min =1.0 inch
max = 7.0 inch
min =1.0 inch
max = 7.0 inch
EP80579 Data\Control Tx Breakin
Length (LD\C_Brk_in_rx)
0.3 inch (max) 0.3 inch (max)
Total Data\Control Rx Routing
(LD\C_total_rx)
LClk_total_rx ± 50 mils
(See Table 85)
LClk_total_rx ± 50 mils
(See Table 85)
Pull Up Resistor T-Line (Lpull_up) 0.625 inch (max) 0.625 inch (max)
Pull Up Resistor (Rpull_up) 1.2 KΩ (5%)) 1.2 KΩ (5%)
Breakout\Breakin Spacing (e2e) 4 mils (min) 4 mils (min)

Intel EP80579 Specifications

General

Brand	Intel
Model	EP80579
Category	Computer Hardware
Language	English