Datasheet

Intel® Xeon® Processor E5-2400 v2 Product Family 122
Datasheet Volume One
Signal Descriptions
THERMTRIP_N Assertion of THERMTRIP_N (Thermal Trip) indicates one of two
possible critical over-temperature conditions: One, the processor
junction temperature has reached a level beyond which permanent
silicon damage may occur and Two, the system memory interface
has exceeded a critical temperature limit set by BIOS.
Measurement of the processor junction temperature is
accomplished through multiple internal thermal sensors that are
monitored by the Digital Thermal Sensor (DTS). Simultaneously,
the Power Control Unit (PCU) monitors external memory
temperatures via the dedicated SMBus interface to the DIMMs. If
any of the DIMMs exceed the BIOS defined limits, the PCU will
signal THERMTRIP_N to prevent damage to the DIMMs. Once
activated, the processor will stop all execution and shut down all
PLLs. To further protect the processor, its core voltage (VCC),
VTTA, VTTD, VSA, VCCPLL, VCCD supplies must be removed
following the assertion of THERMTRIP_N. Once activated,
THERMTRIP_N remains latched until RESET_N is asserted. While
the assertion of the RESET_N signal may de-assert THERMTRIP_N,
if the processor's junction temperature remains at or above the
trip level, THERMTRIP_N will again be asserted after RESET_N is
de-asserted. This signal can also be asserted if the system
memory interface has exceeded a critical temperature limit set by
BIOS. This signal is sampled after PWRGOOD assertion.
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.
In non-Scalable DP platforms, the legacy socket (identified by
SOCKET_ID[1:0] = 00b) with Intel® TXT Agent should always set
the TXT_AGENT to 1b.
On Scalable DP platforms the TXT AGENT is at the Node Controller.
Refer to the Platform Design Guide (PDG) for more details.
This signal is pulled down on the die, refer to Table 7-6 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.
1 = Default. The platform is Intel® TXT enabled. All sockets should
be set to one. In a non-Scalable DP platform this is the default.
When this is set, Intel TXT functionality requires user to explicitly
enable Intel TXT via BIOS setup.
This signal is pulled up on the die, refer to Table 7-6 for details.
For further details see Intel® Xeon® Processor E5 v2 Product
Family Datasheet, Volume Two: Registers.
Table 6-14. Miscellaneous Signals
Signal Name Description
IVT_ID_N This output can be used by the platform to determine if the installed
processor is a future processor planned for Romley platforms. This is pulled
to ground on the processor package.This signal is also used by the VCCPLL
and VTT rails to switch their output voltage to support future processors.
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.
Table 6-13. Processor Asynchronous Sideband Signals (Sheet 4 of 4)
Signal Name Description