Intel 4 3.20 GHz BX80532PG3200F 사용자 설명서
제품 코드
BX80532PG3200F
16
Intel
®
Pentium
®
4 Processor on 0.13 Micron Process Datasheet
Electrical Specifications
2.3
Decoupling Guidelines
Because of the large number of transistors and high internal clock speeds, the processor is capable
of generating large average current swings between low and full power states. This may cause
voltages on power planes to sag below their minimum values if bulk decoupling is not adequate.
of generating large average current swings between low and full power states. This may cause
voltages on power planes to sag below their minimum values if bulk decoupling is not adequate.
Care must be taken in the board design to ensure that the voltage provided to the processor remains
within the specifications listed in
within the specifications listed in
. Failure to do so can result in timing violations and/or
affect the long term reliability of the processor. For further information and design guidelines, refer
to the appropriate platform design guide and the Intel
®
Pentium
®
4 Processor VR-Down Design
Guidelines.
2.3.1
V
CC
Decoupling
VCC regulator solutions need to provide sufficient decoupling capacitance to satisfy processor
voltage specifications. This includes bulk capacitance with low effective series resistance (ESR) to
keep the voltage rail within specifications during large swings in load current. In addition, ceramic
decoupling capacitors are required to filter high frequency content generated by bus and processor
keep the voltage rail within specifications during large swings in load current. In addition, ceramic
decoupling capacitors are required to filter high frequency content generated by bus and processor
activity. Consult the Voltage Regulator Down design guide and appropriate platform design guide
for further information.
for further information.
2.3.2
System Bus AGTL+ Decoupling
Pentium 4 processors on 0.13 micron process integrate signal termination on the die and
incorporate high frequency decoupling capacitance on the processor package. Decoupling must
also be provided by the system motherboard for proper AGTL+ bus operation. For more
incorporate high frequency decoupling capacitance on the processor package. Decoupling must
also be provided by the system motherboard for proper AGTL+ bus operation. For more
information, refer to the appropriate platform design guide.
2.4
Voltage Identification
The VID specification for Pentium 4 processors on 0.13 micron process is supported by the Intel
®
Pentium
®
4 Processor VR-Down Design Guidelines, Voltage Regulator-Down (VRD) 10.0 Design
Guide, and Voltage Regulator-Down (VRD) 10.0 Design Guide Addendum. The voltage set by the
VID pins is the maximum voltage allowed by the processor. A minimum voltage is provided in
and changes with frequency. This allows processors running at a higher frequency to
have a relaxed minimum voltage specification. The specifications have been set such that one
voltage regulator can work with all supported frequencies.
Pentium 4 processors on 0.13 micron process use five voltage identification pins, VID[4:0], to
support automatic selection of power supply voltages. The VID pins for the Pentium 4 processor on
0.13 micron process are open drain outputs driven by the processor VID circuitry. The VID signals
support automatic selection of power supply voltages. The VID pins for the Pentium 4 processor on
0.13 micron process are open drain outputs driven by the processor VID circuitry. The VID signals
rely on pull-up resistors tied to a 3.3 V (maximum) supply to set the signal to a logic high level.
These pull-up resistors may be either external logic on the motherboard, or internal to the Voltage
Regulator.
These pull-up resistors may be either external logic on the motherboard, or internal to the Voltage
Regulator.
specifies the voltage level corresponding to the state of VID[4:0]. A ‘1’ in this
table refers to a high voltage level, and a ‘0’ refers to low voltage level. The definition provided in
is not related in any way to previous P6 processors or VRs, but is compatible with the
Pentium 4 processor in the 478-pin package. If the processor socket is empty (VID[4:0] = 11111) or
the voltage regulation circuit cannot supply the voltage that is requested, it must disable itself. See
the Intel
the Intel
®
Pentium
®
4 Processor VR-Down Design Guidelines, Voltage Regulator-Down (VRD)
10.0 Design Guide, or Voltage Regulator-Down (VRD) 10.0 Design Guide Addendum for more
details.