Acer Intel Celeron G530 KC.53001.CDG Benutzerhandbuch

Produktcode

KC.53001.CDG

Intel

Celeron

Processor on 0.13 Micron Process in the 478-Pin Package

Datasheet

Features

7.2.2

AutoHALT Powerdown State—State 2

AutoHALT is a low power state entered when the processor executes the HALT instruction. The
processor will transition to the Normal state upon the occurrence of SMI#, BINIT#, INIT#, or
LINT[1:0] (NMI, INTR). RESET# will cause the processor to immediately initialize itself.

The return from a System Management Interrupt (SMI) handler can be to either Normal Mode or
the AutoHALT Power Down state. See the Intel

Architecture Software Developer's Manual,

Volume III: System Programmer's Guide for more information.

The system can generate a STPCLK# while the processor is in the AutoHALT Power Down state.
When the system deasserts the STPCLK# interrupt, the processor will return execution to the
HALT state.

While in AutoHALT Power Down state, the processor will process bus snoops and interrupts.

Figure 37. Stop Clock State Machine

2. Auto HALT Power Down State

BCLK running.
Snoops and interrupts allowed.

4. HALT/Grant Snoop State

BCLK running.
Service Snoops to caches.

Snoop
Event
Occurs

Snoop
Event
Serviced

HALT Instruction and
HALT Bus Cycle generated

INIT#, BINIT#, INTR, NMI,
SMI#, RESET#

Snoop event occurs

Snoop event serviced

1. Normal State

Normal execution.

3. Stop Grant State

BCLK running.
Snoops and interrupts allowed.

STPCLK#
Asserted

STPCLK#
Deasserted

5. Sleep State

BCLK running.
No Snoops and interrupts
allowed.

SLP#
Asserted

SLP# Deasserted

STPCLK# Asserted

STPCLK# Deasserted