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Table 97.
Layout Checklist (Sheet 10 of 13)
Signal Name
GBE0_TxDATA[3:0]
GBE1_TxDATA[3:0]
GBE2_TxDATA[3:0],
GBE0_TxCTL,
GBE1_TxCTL,
GBE2_TxCTL
GBE0_RxCLK,
GBE1_RxCLK,
GBE2_RxCLK
GBE0_RxDATA[3:0]
GBE1_RxDATA[3:0]
GBE2_RxDATA[3:0]
GBE0_RxCTL,
GBE1_RxCTL,
GBE2_RxCTL
MDC
MDIO
GBE_REFCLK
GBE_REFCLK_RMII
GBE_RCOMPP
GBE_RCOMPN
EEDO
EEDI
EECS
EESK
GBE_PME_WAKE
®
Intel
EP80579 Integrated Processor Product Line
Platform Design Guide
278
®
Intel
EP80579 Integrated Processor Product Line—Layout Checklist
Trace Geometry and
Impedance
Zo = 55
Ω
+/- 10%
Trace Width:
Brakeout Trace Width 4 mils
Microstrip: 4.5 mils
Stripline:
3.75 mils (L3/L8)
5 mils (L5/L6)
Airgap Spacing:
Brakeout spacing Min=4mils
Spacing between Data\Control
Stripline Min = 12mils
Microstrip Min = 18mils
Ω
Zo = 50
+/- 10%
Trace Width:
Brakeout Trace Width 4 mils
Microstrip: 5.5 mils
Stripline:
4.5 mils (L3/L8)
6 mils (L5/L6)
Airgap Spacing:
Brakeout spacing Min=4mils
Spacing to other clock signals
Stripline Min = 20mils
Microstrip Min = 25mils
Ω
Zo = 50
+/- 10%
Trace Width:
Brakeout Trace Width 4 mils
Microstrip: 5.5 mils
Stripline:
4.5 mils (L3/L8)
6 mils (L5/L6)
Airgap Spacing:
Brakeout spacing Min=4mils
Spacing between Data\Control
Stipline Min = 12mils
Microstrip Min = 18mils
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Zo = 50
Ω
+/- 10%
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Ω
Zo = 50
+/- 10%
Length Requirements
Breakout:
EP80579 Max = 500mils.
PHY Max = 300mils.
See
Transmit Data\Control
Total Data Routing:
+/- 50 mils of Total Clock
Place pull-up resistors close to
Routing.
PHY device.
Pull Up Trace Length
Max=0.4 in.
Breakout:
EP80579 Max = 500mils.
PHY Max = 300mils.
See
Receive Clock
Total Clock Routing:
Place pull-up resistors close to
Microstrip 1 to 7.8 in
EP80579 device.
Stripline 1 to 7.8 in.
Pull Up Trace Length
Max=0.625 in.
Breakout:
EP80579 Max = 500mils.
PHY Max = 300mils.
See
Receive Data\Control
Total Data Routing:
Place pull-up resistors close to
+/- 50 mils of Total Clock
EP80579 device.
Routing.
Pull Up Trace Length
Max=0.625 in.
• See
Place the RCOMPP resistor as
close as possible EP80579
Place the RCOMPN resistor as
close as possible EP80579
Comments
Section 19.6.1.2, "GbE
Topology".
Section 19.6.2.1, "GbE
Topology".
Section 19.6.2.2, "GbE
Topology".
Section 19.5.1, "GbE
Ethernet Interface — RGMII
Mode".
.
.
May 2010
Order Number: 320068-005US
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