Signal Definitions
78
Notes:
1.
For this processor land on the Quad-Core Intel® Xeon® Processor 5400 Series, the maximum number of
symmetric agents is one. Maximum number of priority agents is zero.
2.
For this processor land on the Quad-Core Intel® Xeon® Processor 5400 Series, the maximum number of
symmetric agents is two. Maximum number of priority agents is zero.
3.
For this processor land on the Quad-Core Intel® Xeon® Processor 5400 Series, the maximum number of
symmetric agents is two. Maximum number of priority agents is one.
§
TMS
I
TMS (Test Mode Select) is a JTAG specification support signal used by
debug tools.
See the Debug Port Design Guide for Intel
®
5000 Series Chipset
Memory Controller Hub (MCH) Systems (External Version) for further
information.
TRDY#
I
TRDY# (Target Ready) is asserted by the target to indicate that it is
ready to receive a write or implicit writeback data transfer. TRDY#
must connect the appropriate pins of all FSB agents.
TRST#
I
TRST# (Test Reset) resets the Test Access Port (TAP) logic. TRST#
must be driven low during power on Reset.
V
CCPLL
I
The Quad-Core Intel® Xeon® Processor 5400 Series implements an
on-die PLL filter solution. The V
CCPLL
input is used as a PLL supply
voltage.
VCC_DIE_SENSE
VCC_DIE_SENSE2
O
VCC_DIE_SENSE and VCC_DIE_SENSE2 provides an isolated, low
impedance connection to the processor core power and ground. This
signal should be connected to the voltage regulator feedback signal,
which insures the output voltage (that is, processor voltage) remains
within specification. Please see the applicable platform design guide
for implementation details.
VID[6:1]
O
VID[6:1] (Voltage ID) pins are used to support automatic selection of
power supply voltages (V
CC
). These are CMOS signals that are driven
by the processor and must be pulled up through a resistor.
Conversely, the voltage regulator output must be disabled prior to the
voltage supply for these pins becomes invalid. The VID pins are
needed to support processor voltage specification variations. See
Table 2-4
for definitions of these pins. The VR must supply the
voltage that is requested by these pins, or disable itself.
VID_SELECT
O
VID_SELECT is an output from the processor which selects the
appropriate VID table for the Voltage Regulator. This signal is not
connected to the processor die. This signal is a no-connect on the
Quad-Core Intel® Xeon® Processor 5400 Series package.
VSS_DIE_SENSE
VSS_DIE_SENSE2
O
VSS_DIE_SENSE and VSS_DIE_SENSE2 provides an isolated, low
impedance connection to the processor core power and ground. This
signal should be connected to the voltage regulator feedback signal,
which insures the output voltage (that is, processor voltage) remains
within specification. Please see the applicable platform design guide
for implementation details.
VTT
P
The FSB termination voltage input pins. Refer to
Table 2-12
for
further details.
VTT_OUT
O
The VTT_OUT signals are included in order to provide a local V
TT
for
some signals that require termination to V
TT
on the motherboard.
VTT_SEL
O
The VTT_SEL signal is used to select the correct V
TT
voltage level for
the processor. VTT_SEL is connected to VSS on the Quad-Core Intel®
Xeon® Processor 5400 Series package.
Table 5-1.
Signal Definitions (Sheet 8 of 8)
Name
Type
Description
Notes
Summary of Contents for E5420 - CPU XEON QUAD CORE 2.50GHZ FSB1333MHZ 12M LGA771 HALOGEN FREE TRAY
Page 1: ...318589 005 Quad Core Intel Xeon Processor 5400 Series Datasheet August 2008 ...
Page 8: ...8 Quad Core Intel Xeon Processor 5400 Series Datasheet ...
Page 14: ...14 ...
Page 106: ...Boxed Processor Specifications 106 Figure 8 4 Top Side Board Keepout Zones Part 1 ...
Page 107: ...107 Boxed Processor Specifications Figure 8 5 Top Side Board Keepout Zones Part 2 ...
Page 108: ...Boxed Processor Specifications 108 Figure 8 6 Bottom Side Board Keepout Zones ...
Page 109: ...109 Boxed Processor Specifications Figure 8 7 Board Mounting Hole Keepout Zones ...
Page 110: ...Boxed Processor Specifications 110 Figure 8 8 Volumetric Height Keep Ins ...