Datasheet
Signal Name Description
This signal is pulled down on the die, refer to Table 8 on page 26 for
details.
EAR_N External Alignment of Reset, used to bring the processor up into a
deterministic state. This signal is pulled up on the die, refer to Table 8 on
page 26 for details.
FIVR_FAULT Indicates an internal error has occurred with the integrated voltage
regulator. The FIVR_FAULT signal can be sampled any time after 1.5 ms
after the assertion of PWRGOOD. FIVR_FAULT must be qualified by
THERMTRIP_N assertion.
FRMAGENT Bootable Firmware Agent Strap. This input configuration strap used in
combination with SOCKET_ID to determine whether the socket is a legacy
socket, bootable firmware agent is present, and DMI links are used in
PCIe* mode (instead of DMI2 mode).
The firmware flash ROM is located behind the local PCH attached to the
processor via the DMI2 interface.This signal is pulled down on the die, refer
to Table 8 on page 26 for details.
PM_FAST_WAKE_N Power Management Fast Wake. Enables quick package C3 - C6 exits of all
sockets. Asserted if any socket detects a break from package C3 - C6 state
requiring all sockets to exit the low power state to service a snoop,
memory access, or interrupt. Expected to be wired-OR among all processor
sockets within the platform.
PROC_ID This output can be used by the platform to determine if the installed
processor is a Intel
®
Xeon
®
processor E5-1600 and E5-2600 v3 product
families. There is no connection to the processor silicon for this signal. The
processor package grounds or floats the pin to set ‘0’ or ‘1’, respectively.
1: Intel
®
Xeon
®
processor E5-1600 and E5-2600 v3 product families
0: Reserved for future use
RSVD RESERVED. All signals that are RSVD must be left unconnected on the
board. Refer to Reserved or Unused Signals on page 22 for details.
SAFE_MODE_BOOT Safe Mode Boot Strap. SAFE_MODE_BOOT allows the processor to wake up
safely by disabling all clock gating. This allows BIOS to load registers or
patches if required. This signal is sampled after PWRGOOD assertion. The
signal is pulled down on the die. Refer to Table 8 on page 26 for details.
SKTOCC_N SKTOCC_N (Socket Occupied) is used to indicate that a processor is
present. This is pulled to ground on the processor package; there is no
connection to the processor silicon for this signal.
SOCKET_ID[1:0] Socket ID Strap. Socket identification configuration straps for establishing
the PECI address, Intel
®
QPI Node ID, and other settings. This signal is
used in combination with FRMAGENT to determine whether the socket is a
legacy socket, bootable firmware agent is present, and DMI links are used
in PCIe* mode (instead of DMI2 mode). Each processor socket consumes
one Node ID, and there are 128 Home Agent tracker entries. This signal is
pulled down on the die. Refer to Table 8 on page 26 for details.
TEST[3:0] Test[3:0] must be individually connected to an appropriate power source or
ground through a resistor for proper processor operation.
TXT_AGENT Intel
®
Trusted Execution Technology (Intel
®
TXT) Agent Strap.
0 = Default. The socket is not the Intel TXT Agent.
1 = The socket is the Intel TXT Agent.
The legacy socket (identified by SOCKET_ID[1:0] = 00b) with Intel TXT
Agent should always set the TXT_AGENT to 1b.
This signal is pulled down on the die, refer to Table 8 on page 26 for
details.
TXT_PLTEN Intel Trusted Execution Technology (Intel TXT) Platform Enable Strap.
0 = The platform is not Intel TXT enabled. All sockets should be set to
zero. Scalable DP (sDP) platforms should choose this setting if the Node
Controller does not support Intel TXT.
Intel
®
Xeon
®
Processor E5-1600 and E5-2600 v3 Product Families—Intel
®
Xeon
®
Processor
E5-1600 and E5-2600 v3 Product Families Signal Descriptions
Intel
®
Xeon
®
Processor E5-1600 and E5-2600 v3 Product Families, Volume 1 of 2, Electrical
Datasheet September 2014
56 Order No.: 330783-001