Intel
®
EP80579 Integrated Processor Product Line—System Power Delivery Guide
Intel
®
EP80579 Integrated Processor Product Line
Platform Design Guide May 2010
66 Order Number: 320068-005US
6.3 Power Planes
Table 10 summarizes the Development Board power supply interconnect to the
EP80579 power pins.
Suspend
1.2V
VCC1P2_USBSUS USB2 1.2V USB sustain power
VCCSUS1 IMCH_PAD RTC core sustain power
2.5V VCCSUS25 GbE Sustain GbE power
3.3V
VCCPSUS USB2, IMCH
USB sustain power, RTC IO
sustain power
VCCGBEPSUS GbE
Sustain 3.3V tolerance
reference
5V VCC50_SUS N/A N/A
RTC 3.3V VCCPRTC IMCH Real Time Clock power
GND Analog Ground VSSA Ground Analog Ground
GND Ground VSS Ground Ground
Table 9. Power Supply Pins (Sheet 2 of 2)
Well
Development
Board
Voltage Rail
EP80579
Power Pin
Name
Supply Types Description
Table 10. Power and Ground Planes (Sheet 1 of 2)
Development
Board
Signal Name
EP80579
Power Pin Name
Description
IA-32 core Power Supply Pins
VCC_CPU VCCVC
Power Supply (1.0V - 1.3V) for IA-32 core
• 1.0V when operating at 600 MHz
• 1.3V when operating at 1.066 GHz
• 1.3V when operating at 1.2 GHz
VCCA[2:1] VCCA[2:1] 1.2V CPU core PLL Analog Voltage
Core Logic Power Supply Pins
V1P2 VCC
1.2V supply pins for core logic (CRU, EXP_Bus, GbE, IICH,
IMCH, SATA, PCI Express)
VCC3 VCC33
3.3V supply for all 3.3V I/O functions which are not dedicated
to their own power rail. The units using this rail include:
IMCH, Global Clock/Reset(CRU), USB, CAN, EXP_Bus, SATA,
and GbE.
VCC VCC50
5V power supply for 5V tolerance units. (IICH, CRU, CAN, and
EXP_Bus
V2P5 VCC25 2.5V supply for GbE unit.
DDR2 Unit Power Supply Pins
V1P8_DDR VCC18 1.8V power supply for DDR2 I/O
DDR2_VTT VTTDDR 0.9V DDR2 Reference Voltage (Vref)
Suspend/Resume Power Supply Pins
VSBY1_2
VCCSUS1
VCC1P2_USBSUS
1.2V power pins for the resume well GbE, USB, and IICH core
logic. This power is not expected to be shut off unless the
system is unplugged.
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