Schematic Checklist - Intel EP80579 Manual

Schematics Checklist—Intel
28.2

Schematic Checklist

s
Table 100. Schematic Checklist (Sheet 1 of 26)
Checklist Items
Global Clock Unit (CRU)
CLKP100
CLKN100
Thermal Diode
THERMDA
THERMDC
Sideband Miscellaneous Signals
CPUSLP_OUT#
INIT33V_OUT#
®
Intel EP80579 Integrated Processor Product Line
Order Number: 320068-005US
®
EP80579 Integrated Processor Product Line
I/O Type
Recommendations
(Default)
IA-32 core Interface
Differential positive 100 MHz IA-32
core clock input.
• Connect from CK410 Clock
Generator CPU_0 output
I
through a 33 Ω ±5% series
resistor.
• Terminate to GND through a 49.9 Ω
±1% resistor.
Differential negative 100 MHz IA-32
core clock input.
• Connect from CK410 Clock
Generator CPU_0# output
I
through a 33 Ω ±5% series
resistor.
• Terminate to GND through a
49.9Ω ±1% resistor
• Connect to Anode of Thermal
I Diode of temperature
monitoring circuitry if used.
• Connect to Cathode of Thermal
O Diode of temperature
monitoring circuitry if used.
• Can monitor signal using an
LED
O
• Pull up signal to Platform 3.3V
(VCC3) power supply using
4.7KΩ ± 5% resistor if used.
• Connect to FWH INT# pin.
• Pull up signal to Platform 3.3V
(VCC3) power supply using
O
4.7KΩ ± 5% resistor if used.
• This signal can be monitored
via an LED
Comments
Differential (Positive) System Bus Clock
Signal
Differential (Negative) System Bus
Clock Signal
• The Development Board monitors
the temperature of the EP80579
device via the SuperIO chip.
• Couple THERMDA and THERMDC
signals together using 100 pF
50V capacitor.
• Route signals as differential pairs.
Note:
• These signals are used to monitor
and control the EP80579 CPU
temperature. It is used to control
the fan speeds of the EP80579 heat
sink. If this feature is not used, the
heat sink fan can be connected to
operate at a constant speed, and
these signals can be left as no
connect (NC)
Note:
• This signal can be left as a no
connect (NC) if not used.
• This signal can be exposed via a
testpoint for debug purposes if not
used.
Note:
• This signal can be left as a no
connect (NC) if not used.
• This signal can be exposed via a
testpoint for debug purposes if not
used.
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