Signal Description
78
Datasheet
6.10
Error and Thermal Protection
Table 6-31.Error and Thermal Protection
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.
External agents are allowed to assert this pin
which will cause the processor to take a machine
check exception.
I/O
GTL
PECI
PECI (Platform Environment Control
Interface):
A serial sideband interface to the
processor, it is used primarily for thermal, power,
and error management. Details regarding the
PECI electrical specifications, protocols, and
functions can be found in the RS - Platform
Environment Control Interface (PECI)
Specification, Revision 2.0.
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.
I/O
Asynchronous GTL
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 GTL
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