Q6000 datasheet(86/98 Pages) INTEL

86 / 98 page

Features

Datasheet

6.2.4

Extended HALT Snoop or HALT Snoop State,

Stop Grant Snoop State

The Extended HALT Snoop State is used in conjunction with the new Extended HALT

state. If Extended 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 Extended 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

Extended HALT Snoop State

The Extended HALT Snoop State is the default Snoop State when the Extended HALT

state is enabled via the BIOS. The processor will remain in the lower bus ratio and VID

operating point of the Extended HALT state.

While in the Extended 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 Extended

HALT state.

§ §

Q6000 Datasheet(PDF) 86 Page - Intel Corporation