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Signal Name Description Direction / Buffer
Type
TDO
Test Data Out: This signal transfers serial test data out
of the processor. This signal provides the serial output
needed for JTAG specification support.
O
Open Drain
TMS
Test Mode Select: This is a JTAG specification
supported signal used by debug tools.
I
GTL
TRST#
Test Reset: This signal resets the Test Access Port
(TAP) logic. This signal must be driven low during power
on Reset.
I
GTL
6.9 Error and Thermal Protection Signals
Table 32. Error and Thermal Protection Signals
Signal Name Description Direction / Buffer
Type
CATERR#
Catastrophic Error: This signal indicates that the system has
experienced a catastrophic error and cannot continue to
operate. The processor will set this for non-recoverable
machine check errors or other unrecoverable internal errors.
CATERR# is used for signaling the following types of errors:
Legacy MCERRs, CATERR# is asserted for 16 BCLKs. Legacy
IERRs, CATERR# remains asserted until warm or cold reset.
O
GTL
PECI
Platform Environment Control Interface: A serial
sideband interface to the processor, it is used primarily for
thermal, power, and error management.
I/O
Asynchronous
PROCHOT#
Processor Hot: PROCHOT# goes active when the processor
temperature monitoring sensor(s) detects that the processor
has reached its maximum safe operating temperature. This
indicates that the processor Thermal Control Circuit (TCC) has
been activated, if enabled. This signal can also be driven to
the processor to activate the TCC.
GTL Input
Open-Drain Output
THERMTRIP#
Thermal Trip: The processor protects itself from catastrophic
overheating by use of an internal thermal sensor. This sensor
is set well above the normal operating temperature to ensure
that there are no false trips. The processor will stop all
execution when the junction temperature exceeds
approximately 130 °C. This is signaled to the system by the
THERMTRIP# pin.
O
Asynchronous OD
Asynchronous CMOS
Signal Description—Processor
Intel
®
Xeon
®
Processor E3-1200 v3 Product Family
June 2013 Datasheet – Volume 1 of 2
Order No.: 328907-001 83