Datasheet

Functional Description

Intel® Xeon® Processor D-1500 Product Family 91

Datasheet - Volume 1 of 4: Integrated Platform Controller Hub

March 2015

Using a GPI to Clear CMOS

A jumper on a GPI can also be used to clear CMOS values. BIOS would detect the

setting of this GPI on system boot-up, and manually clear the CMOS array.

Note: The GPI strap technique to clear CMOS requires multiple steps to implement. The

system is booted with the jumper in new position, then powered back down. The

jumper is replaced back to the normal position, then the system is rebooted again.

Warning: Do not implement a jumper on VccRTC to clear CMOS.

3.12 Power Management

3.12.1 Features

• Support for Advanced Configuration and Power Interface, Version 4.0a (ACPI)

providing power and thermal management

— ACPI 24-Bit Timer SCI and SMI# Generation

• PCI PME# signal for Wake Up from Low-Power states

• System Sleep State Control

— ACPI S4 state – Suspend-to-Disk (STD)

— ACPI G2/S5 state – Soft Off (SOFF)

— Power Failure Detection and Recovery

• Intel Management Engine (Intel ME) Power Management Support

— Wake events from the Intel Management Engine (enabled from all S-States

including Catastrophic S5 conditions)

NEWCENTURY_STS TCO1 Status Register

(TCO1_STS)

TCOBase + 04h 7 0

Intruder Detect

(INTRD_DET)

TCO2 Status Register

(TCO2_STS)

TCOBase + 06h 0 0

Top Swap (TS) Backed Up Control Register (BUC) Chipset Config

Registers:Offset 3414h

Table 3-19. Configuration Bits Reset by RTCRST# Assertion (Sheet 2 of 2)

Bit Name Register Location Bit(s)

Default

State