Designing With The 82563Eb/82564Eb Gigabit Ethernet Platform Lan Connect; Powering Down The 82563Eb/82564Eb Gigabit Ethernet Platform Lan Connect; Serial Eeprom For 82563Eb/82564Eb Gigabit Ethernet Platform Lan Connect Implementations; Power Supplies For The 82563Eb/82564Eb Device - Intel 82563EB Design Manual

3.2 Designing with the 82563EB/82564EB Gigabit Ethernet
Platform LAN Connect
This section provides design guidelines specific to the 82563EB/82564EB Gigabit Ethernet
Platform LAN Connect.
3.2.1 Powering Down the 82563EB/82564EB Gigabit Ethernet Platform LAN
Connect
The 82563EB/82564EB device has a signal named PHY_SLEEP that can be used as an alternative
to an in-band event for powering down the Ethernet PHY functions driven only by the 631xESB/
632xESB. When using the in-band event, PHY_SLEEP should be connected to a pulldown resistor
for normal operation.
3.2.2 Serial EEPROM for 82563EB/82564EB Gigabit Ethernet Platform LAN
Connect Implementations
Please note that the EEPROM is connected to the 631xESB/632xESB and not directly to the
82563EB/82564EB. Several words of the EEPROM are accessed automatically by the device after
reset to provide pre-boot configuration data before it is accessed by host software. The remainder
of the EEPROM space is available to software for storing the MAC address, serial numbers, and
additional information. More details may be obtained from the Bensley/Bensley-VS Platform
Design Guide.
Intel has an MS-DOS* software utility called EEUPDATE, which can be used to program
EEPROM images in development or production line environments. To obtain a copy of this
program, contact your Intel representative.
3.2.3

Power Supplies for the 82563EB/82564EB Device

The 82563EB/82564EB device requires three power supplies (3.3V, 1.9V, and 1.2V). For
1000BASE-T designs, the 1.2V supply must provide approximately 580 mA current. The 1.9V
supply must provide approximately 850 mA current. The 3.3V supply must provide approximately
25 mA current.
A central power supply can provide all the required voltage sources, or the power can be derived
from the 3.3V supply and regulated locally near the Ethernet control circuitry. Keep in mind that all
voltage sources must remain present during powerdown in order to use the 82563EB/82564EB
Gigabit Ethernet Platform LAN Connect device's LAN wake up capability. This consideration
makes it more likely that at least some of the voltage sources will be local.
Instead of using external regulators to supply 1.2V and 1.9V, the designer may use power
transistors in conjunction with on-chip regulation circuitry. When using the internal voltage
regulation control logic, the sequencing of the voltages are controlled internally by the 82563EB/
82564EB. Refer to the 82563EB/82564EB Gigabit Platform LAN Connect Datasheet for specific
internal power sequencing requirements.
82563EB/82564EB LAN on Motherboard Design Guide
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