HP XU700 Sensor, ADM1024, Controller, DIMM Sockets, RIMM Sockets, Serial EEPROM, PC Workstation, LM75 Temperature, ICH2 SMBus Master, used to store data online

2 System Board

The Input/Output Controller Hub 2 (82801BA)

ICH2 SMBus Master	The ICH2 provides a processor-to-SMBus controller. All access performed to
Controller	the SMBus is done through the ICH2 SMBus interface. Typically, the
	processor has access to all the devices connected to the SMBus.
DIMM Sockets	Each DIMM socket is connected to the SMBus. The 168-pin DIMM modules
	include a 256 byte I2C Serial EEPROM. The first 128 bytes contain general
	information, including the DRAM chips’ manufacturer’s name, DIMM speed
	rating, DIMM type, etc. The second 128 bytes of the Serial EEPROM can be
	used to store data online.
RIMM Sockets	Each RIMM socket is connected to the SMBus. The 168-pin RIMM modules
	include a 256 byte I2C Serial EEPROM. The first 128 bytes contain general
	information, including the DRAM chips’ manufacturer’s name, RIMM speed
	rating, RIMM type, etc. The second 128 bytes of the Serial EEPROM can be
	used to store data online.
ADM1024	The ADM1024 chip is a hardware monitoring sensor dedicated to the
	processor temperature. This chip uses the thermal diodes integrated into
	each processor cartridge and makes the temperature information available
	through the SMBus. It also monitors processor power supply voltages.
Serial EEPROM	This is the non-volatile memory which holds the default values for the CMOS
	memory (in the event of battery failure).When installing a new system
	board, the Serial EEPROM will have a blank serial number field. This will be
	detected automatically by the BIOS, which will then prompt the user for the
	serial number which is printed on the identification label on the back of the
	PC Workstation.
	The computer uses 16KBytes of Serial EEPROM implemented within two
	chips. Serial EEPROM is ROM in which one byte at a time can be returned to
	its unprogrammed state by the application of appropriate electrical signals.
	In effect, it can be made to behave like very slow, non-volatile RAM. It is
	used for storing the tatoo string, the serial number, and the parameter
	settings for the Setup program as well as MaxiLife firmware.
LM75 Temperature	The LM75 temperature sensor and alarm are located on the system board.
Sensor	The sensor is used to measure the temperature in various areas of the
	system board. This information is used to regulate fans.

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