Intel 6 SERIES CHIPSET - DATASHEET 01-2011 Datasheet page 48

The RTC also supports a date alarm that allows for scheduling a wake up event up to 30
days in advance, rather than just 24 hours in advance.
GPIO
Various general purpose inputs and outputs are provided for custom system design.
The number of inputs and outputs varies depending on PCH configuration.
Enhanced Power Management
The PCH's power management functions include enhanced clock control and various
low-power (suspend) states (such as Suspend-to-RAM and Suspend-to-Disk). A
hardware-based thermal management circuit permits software-independent entrance
to low-power states. The PCH contains full support for the Advanced Configuration and
Power Interface (ACPI) Specification, Revision 4.0a.
Manageability
The PCH integrates several functions designed to manage the system and lower the
total cost of ownership (TCO) of the system. These system management functions are
designed to report errors, diagnose the system, and recover from system lockups
without the aid of an external microcontroller.
• TCO Timer. The PCH's integrated programmable TCO timer is used to detect
system locks. The first expiration of the timer generates an SMI# that the system
can use to recover from a software lock. The second expiration of the timer causes
a system reset to recover from a hardware lock.
• Processor Present Indicator. The PCH looks for the processor to fetch the first
instruction after reset. If the processor does not fetch the first instruction, the PCH
will reboot the system.
• ECC Error Reporting. When detecting an ECC error, the host controller has the
ability to send one of several messages to the PCH. The host controller can instruct
the PCH to generate either an SMI#, NMI, SERR#, or TCO interrupt.
• Function Disable. The PCH provides the ability to disable the following integrated
functions: LAN, USB, LPC, Intel HD Audio, SATA, PCI Express or SMBus. Once
disabled, these functions no longer decode I/O, memory, or PCI configuration
space. Also, no interrupts or power management events are generated from the
disabled functions.
• Intruder Detect. The PCH provides an input signal (INTRUDER#) that can be
attached to a switch that is activated by the system case being opened. The PCH
can be programmed to generate an SMI# or TCO interrupt due to an active
INTRUDER# signal.
48
Introduction
Datasheet