Intel EP80579 Manual page 302

Schematics Checklist—Intel
Table 100. Schematic Checklist (Sheet 19 of 26)
Checklist Items
GBEn_RxCLK
GBEn_RxCTL
GBE_REFCLK
®
Intel EP80579 Integrated Processor Product Line
Order Number: 320068-005US
®
EP80579 Integrated Processor Product Line
I/O Type
Recommendations
(Default)
• Interconnect each Port Receive
Clock (GBEn_RxCLK) to the
corresponding Port Receive
Clock of the RGMII PHY Device
• Pull up GBE Port 0 Receive
Clock signal to EP80579 2.5V
I Standby Voltage (VCCSUS25)
using a 1.2KΩ ± 5% resistor.
• Pull up GBE Port 1&2 Receive
Clock signals to GBE 2.5V using
a 1.2KΩ ± 5% resistors.
• Pull-down all unused Receive
Clock signals to GND using 10
KΩ resistors.
Note:
• Pull-down all Receive Clock signals to GND using 10 KΩ resistors when the port is not
used in either mode
• Interconnect each Port Receive
Control (GBEn_RxCTL) to the
corresponding Port Receive
Data Valid (RX_DV) of the
RGMII PHY Device
• Pull up GBE Port 0 Receive
Control signal to EP80579 2.5V
I
Standby Voltage (VCCSUS25)
using a 1.2KΩ ± 5% resistor.
• Pull up GBE Port 1&2 Receive
Control signals to GBE 2.5V
using a 1.2KΩ ± 5% resistors.
• Pull-down all unused Receive
Control signals to GND using 10
KΩ resistors .
Note:
• Pull-down all Receive Control signals to GND using 10 KΩ resistors when the port is not
used in either mode
• 125 MHz Reference clock
I
• Sourced from an external clock
or from the RGMII PHY Device.
Note:
• Connect to 125 MHz clock source when the ports are not used in either mode.
• See Section 2.3
RGMII Mode
• No used in this mode
• Pull-down all Receive Clock signals
RGMII Mode
• Interconnect each Port Receive
• Pull up GBE Port 0 Receive Control
• Pull up GBE Port 1&2 Receive
• Pull-down all unused Receive
RGMII Mode
• 50 MHz Reference clock.
• External clock to both the MAC and
Comments
RMII Mode
to GND using 10 KΩ resistors
RMII Mode
Control (GBEn_RxCTL) to the
corresponding Port Receive Data
Valid (CRS_DV) of the RMII PHY
Device
signal to EP80579 3.3V Standby
Voltage (VCCGBEPSUS) using a
1.2KΩ ± 5% resistor.
Control signals to GBE 3.3V using a
1.2KΩ ± 5% resistors
Control signals to GND using 10 KΩ
resistors .t
RMII Mode
RMII PHY Device
May 2010
302