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Datasheet 105
Signals Reference
A.1.64 THRMALERT# (O)
THRMALERT# is asserted when the measured temperature from the processor thermal diode
equals or exceeds the temperature threshold data programmed in the high-temp (THIGH) or low-
temp (TLOW) registers on the sensor. This signal can be used by the platform to implement
thermal regulation features.
A.1.65 TMS (I)
The Test Mode Select (TMS) signal is an IEEE 1149.1 compliant TAP specification support signal
used by debug tools.
A.1.66 TND# (I/O)
The TLB Purge Not Done (TND#) signal is asserted to delay completion of a TLB Purge
instruction, even after the TLB Purge transaction completes on the system bus.
A.1.67 TRDY# (I)
The Target Ready (TRDY#) signal is asserted by the target to indicate that it is ready to receive a
write or implicit writeback data transfer.
A.1.68 TRST# (I)
The TAP Reset (TRST#) signal is an IEEE 1149.1 compliant TAP support signal used by debug
tools.
A.1.69 WSNP# (I/O)
The Write Snoop (WSNP#) signal indicates that snooping agents will snoop the memory write
transaction
A.2 Signal Summaries
Table A-12 through Table A-15 list attributes of the Itanium 2 processor output, input, and I/O
signals.
Table A-12. Output Signals (Sheet 1 of 2)
Name Active Level Clock Signal Group
CPUPRES# Low — Platform
DBSY_C1# Low BCLKp Data
DBSY_C2# Low BCLKp Data
DRDY_C1# Low BCLKp Data
DRDY_C2# Low BCLKp Data
FERR# Low Asynchronous PC Compatibility,
IERR Mode