Tco Timer; Processor Present Indicator; Error Code Correction (Ecc) Reporting; Function Disable - Dell R210 II Technical Manual

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functions are designed to report errors, diagnose the system, and recover from system lockups
without the aid of an external microcontroller.
8.15.1

TCO Timer

The chipset'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.
8.15.2

Processor Present Indicator

The chipset looks for the processor to fetch the first instruction after reset. If the processor does not
fetch the first instruction, the Ibex Peak will reboot the system.
8.15.3

Error Code Correction (ECC) Reporting

When detecting an ECC error, the host controller has the ability to send one of several messages to
the chipset. The host controller can instruct the chipset to generate an SMI#, NMI, SERR#, or TCO
interrupt.
8.15.4

Function Disable

The chipset 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.
8.15.5

Intruder Detect

The chipset provides an input signal (INTRUDER#) that can be attached to a switch that is activated
when the system case is opened. The chipset can be programmed to generate an SMI# or TCO
interrupt due to an active INTRUDER# signal.

8.16 System Management Bus (SMBus 2.0)

The chipset contains an SMBus Host interface that allows the processor to communicate with SMBus
slaves. This interface is compatible with most I2C devices. Special I2C commands are implemented.
The chipset's SMBus host controller provides a mechanism for the processor to initiate
communications with SMBus peripherals (slaves). Also, the chipset supports slave functionality,
including the Host Notify protocol. Hence, the host controller supports eight command protocols of
the SMBus interface.
Dell PowerEdge R210 II Technical Guide
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