JG82852GMSL7VP Datasheet, PDF (42/176 Pages) Intel Corporation – Intel® 852GM/852GMV Chipset Intel® 852GM/852GMV Chipset Hub (GMCH)

Signal Description
R
2.6. Voltage References, PLL Power
Table 11. Voltage References, PLL Power
Signal Name
Type
Description
Host Processor
HXRCOMP
HYRCOMP
HXSWING
HYSWING
HDVREF[2:0]
HAVREF
HCCVREF
VTTLF
VTTHF
System Memory
SMRCOMP
SMVREF_0
SMVSWINGH
SMVSWINGL
VCCSM
VCCQSM
VCCASM
Hub Interface
HLRCOMP
PSWING
Analog
Analog
Analog
Analog
Ref
Analog
Ref
Analog
Ref
Analog
Power
Power
Analog
Ref
Analog
Ref
Analog
Ref
Analog
Power
Power
Power
Analog
Analog
Host RCOMP: Used to calibrate the host AGTL+ I/O buffers.
Host RCOMP: Used to calibrate the host AGTL+ I/O buffers.
Host Voltage Swing (RCOMP reference voltage): These signals provide a
reference voltage used by the FSB RCOMP circuit.
Host Voltage Swing (RCOMP reference voltage): These signals provide a
reference voltage used by the FSB RCOMP circuit.
Host Data (input buffer) VREF: Reference voltage input for the data signals of the
host AGTL+ interface. Input buffer differential amplifier to determine a high versus
low input voltage.
Host Address input buffer VREF: Reference voltage input for the address signals
of the host AGTL+ interface. This signal is connected to the input buffer differential
amplifier to determine a high versus low input voltage.
Host Common Clock (Command input buffer) VREF: Reference voltage input for
the common clock signals of the host AGTL+ interface. This signal is connected to
the input buffer differential amplifier to determine a high versus low input voltage.
FSB Power Supply: VTTLF is the low frequency connection from the board. This
signal is the primary connection of power for GMCH.
FSB Power Supply: VTTHF is the high frequency supply. It is for direct connection
from an internal package plane to a capacitor placed immediately adjacent to the
GMCH.
Note: Not to be connected to power rail.
System Memory RCOMP: This signal is used to calibrate the memory I/O buffers.
Memory Reference Voltage(Input buffer VREF):Reference voltage input for
memory interface.
Input buffer differential amplifier to determine a high versus low input voltage.
RCOMP reference voltage: This is connected to the RCOMP buffer differential
amplifier and is used to calibrate the I/O buffers.
RCOMP reference voltage: This is connected to the RCOMP buffer differential
amplifier and is used to calibrate the I/O buffers.
Power supply for Memory I/O.
Power supply for System Memory clock buffers.
Power supply for System Memory logic running at the core voltage (isolated supply,
not connected to the core).
Hub Interface RCOMP: This signal is connected to a reference resistor in order to
calibrate the buffers.
RCOMP reference voltage: This is connected to the RCOMP buffer differential
amplifier and is used to calibrate the buffers.
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Intel^® 852GM/852GMV Chipset GMCH Datasheet