AMD-762 Datasheet, PDF (37/122 Pages) Advanced Micro Devices – System Controller

24416C—December 2001
Preliminary Information
AMD-762™ System Controller Data Sheet
2.6
Power Management
The AMD-762 system controller supports the Advanced
Configuration Power Interface (ACPI) specification, On-Now,
and PC 99 requirements through a handshake mechanism with
the processor. The ACPI-defined registers required for processor
and system power management are contained in the
Southbridge. SMM memory remapping is handled by a
model-specific register in the AMD Athlon processor. See the
AMD Athlon™ BIOS Developers Guide, order# 21656, for more
information about the SMM remapping operation.
Figure 9 shows how the processor and system controller
communicate power-state transitions.
DDR SDRAMs
AMD Athlon™
Processors
0 and 1
AMD Athlon
Processor
System Bus
CLK CKE
AMD-762™ Sys-
tem Controller
(Northbridge)
RESET#
PCI BUS
DCSTOP#
AMD-768™
Peripheral
Bus Controller
(Southbridge)
133-MHz
System
Clocks
66-MHz
AGP
Clock
33-MHz
PCI
Clocks
Clock Generator
Figure 9. Power Management Signal Connections
STPCLK#
Chapter 2
Functional Operation
25