Table 23: Additional Devices - GE VR11 Reference Manual

Additional devices
GE Intelligent Platforms – VR11, VP11 Hardware Reference Manual, Second Edition
The Technical Product Information CD-ROM supplied with the VR11 includes
the most commonly used software drivers and utilities.
SMBus devices
The VR11 uses a serial 2-wire I
devices:
Device
Clock synthesizer *
Clock buffer *
SPD Eeprom
Factory Eeprom
User Eeprom 24C512
Temperature Sensor LM86
Optional Temperature sensor
LM83
Northbridge E7520
Southbridge 6300ESB (slave)
PCIe bridge 6700PXH
Devices marked * are handled by BIOS. It is strongly recommended not to
access these devices via the user software.
An X at bit 0 represents the R/#W bit.
Temperature Sensor LM86
A LM86 temperature sensor is implemented on the VR11 board. The sensor is
located close to the CPU and shows the die-temperature of the CPU and the
local onboard temperature. The sensor has an over-temperature output
integrated and this can be used to take actions like reducing the CPU speed. For
programming information please see the 'Board Specific Hardware
Programmer's Manual´.
More information on LM86 can be found in the data sheet from National
Semiconductors.
Serial EEPROM
For storage of user data a serial EEPROM is implemented on the VR11 board.
The user EEPROM is a 24C512 type with 64 kBytes of memory. More
information about writing and reading the contents can be found in the data
sheets from the manufacturer (e.g. Microchip Technology, SGS Thomson,
Atmel, Catalyst and many others).
2
C bus to communicate with several onboard

Table 23: Additional devices

Designation
U1000
U1110
U1981
U1981
U1983
U1985
U1982
U1300
U1600
U6000
SMBus address a
1101 001Xb
1101 110Xb
1010 1XXXb
1010 00XXb
1010 010Xb
0101 011Xb
0011 001Xb
0011 000Xb
1000 100Xb
1100 000Xb
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