Timers; Rtc (Real Time Clock); Power Management; Hardware Monitor - Global American 3307800 User Manual

Table of Contents

2.5.12 Timers

The ATI SB600 south bridge has the following timers

8254-compatible timer

Microsoft High Precision Event Timer (HPET)

ACPI power management timer

256 bytes of battery backed RAM is provided by the real time clock (RTC) integrated into

the ATI SB600. The RTC keeps track of the time and stores system data even when the

system is turned off. Some of the features of the RTC are listed below:

256-byte battery backed CMOS RAM

Hardware supported century rollover

RTC battery monitoring feature

ACPI specification 3.0 compliant power management schemes on the ATI SB600 include:

Supports C2, C3, C4

Supports C1e and C3 pop-up (AMD platform only)

Supports S0, S1, S2, S3, S4, and S4

Supports SpeedStep™

Full support for On-Now™

Supports CPU SMM, generating SMI# signal upon power management events

GPIO supports on external wake up events

Supports CLKRUN# on PCI power management

Provides clock generator and CPU STPCLK# control

Hardware monitoring support

Support for ASF

Page 20

3307800

Table of Contents