Features
While in the Stop-Grant State, SMI#, INIT#, BINIT# and LINT[1:0] will be latched by
the processor, and only serviced when the processor returns to the Normal State. Only
one occurrence of each event will be recognized upon return to the Normal state.
While in Stop-Grant state, the processor will process a FSB snoop.
6.2.4
Enhanced HALT Snoop or HALT Snoop State,
Stop Grant Snoop State
The Enhanced HALT Snoop State is used in conjunction with the new Enhanced HALT
state. If Enhanced HALT state is not enabled in the BIOS, the default Snoop State
entered will be the HALT Snoop State. Refer to the sections below for details on HALT
Snoop State, Grant Snoop State and Enhanced HALT Snoop State.
6.2.4.1
HALT Snoop State, Stop Grant Snoop State
The processor will respond to snoop transactions on the FSB while in Stop-Grant state
or in HALT Power Down state. During a snoop transaction, the processor enters the
HALT Snoop State:Stop Grant Snoop state. The processor will stay in this state until the
snoop on the FSB has been serviced (whether by the processor or another agent on the
FSB). After the snoop is serviced, the processor will return to the Stop Grant state or
HALT Power Down state, as appropriate.
6.2.4.2
Enhanced HALT Snoop State
The Enhanced HALT Snoop State is the default Snoop State when the Enhanced HALT
state is enabled via the BIOS. The processor will remain in the lower bus ratio and VID
operating point of the Enhanced HALT state.
While in the Enhanced HALT Snoop State, snoops are handled the same way as in the
HALT Snoop State. After the snoop is serviced the processor will return to the Enhanced
HALT state.
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Datasheet
INTEL [ INTEL CORPORATION ]
