Lan Checklist; Power Delivery Checklist - Intel 815 Design Manual

System Design Checklist
13.9

LAN Checklist

Checklist Items
TDP, TDN, RDP, RDN
LANAPWR
LANCLKRUN
LAN_ISOLATE#
LAN_TEST
LAN_XTAL1, LAN_XTAL2
FLD5_PD, FLD6_PD,
RBIAS10, RBIAS100
ACTLED/LI_CR
LILED
ACT_CR
RD_PD
TD_PD
SPEEDLED
CHASSIS_GND
JP7_PU, JP18_PU,
JP23_PU
R_LANIDS
13.10

Power Delivery Checklist

All voltage regulator components meet maximum
current requirements
All regulator components meet thermal requirements
VCC1_8
If devices are powered directly from a dual rail
(i.e., not behind a power regulator), then the RDSon
of the FETs used to create the dual rail must be
analyzed to ensure there is not too much voltage drop
across the FET.
Dropout Voltage
Voltage tolerance requirements are met
168
Pull-down through 50 Ω resistor to GND
Passes through 3 kΩ resistor
Pull-down through 62 kΩ resistor
Connect to SUS_STAT# and PWROK
Pull-down through a 4.7 kΩ resistor to GND
Signal from 25 MHz oscillator
Decouple through a 22 pF capacitor to GND
Pull-down through a 619 Ω resistor to GND
Passes through 330 Ω resistor
Connect to jumper, pull-up through 330 Ω resistor to VCC3SBY
Pull-up through 330 Ω resistor to VCC3SBY
Pull-down RDP through 50 Ω resistor and to RDN through 50 Ω resistor to
GND
Pull-down TDP through 50 Ω resistor and to TDN through 50 Ω resistor to
GND
Connect LED anode to VCC3SBY through 330 Ω resistor and cathode to
®
Intel 82559. Jumper to VCC3SBY through 330 Ω resistor
Use plane for this signal.
Pull-up through 330 Ω resistor to VCC3SBY
Pass through 100 Ω resistor to AD20 from Intel 82559 pin IDSEL.
Checklist Items
Recommendations
Recommendations
Consider all loads on a regulator, including
other regulators.
Ensure the voltage regulator components and
dissipate the required amount of heat.
VCC1_8 power sources must supply 1.85V
"Dual" voltage rails may not be at the expected
voltage.
The minimum dropout for all voltage regulators
must be considered. Take into account that the
voltage on a dual rail may not be the expected
voltage.
See individual component specifications for
each voltage tolerance.
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Intel 815 Chipset Platform Design Guide
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