Intel Xeon L7445 AD80583JH046003 데이터 시트
제품 코드
AD80583JH046003
Electrical Specifications
18
Intel® Xeon® Processor 7400 Series Datasheet
2.3.2
PLL Power Supply
An on-die PLL filter solution is implemented on the processor. The
V
CCPLL
input is used
to provide power to the on chip PLL of the processor. Please refer to
specifications. Refer to the appropriate platform design guidelines for decoupling and
routing guidelines.
routing guidelines.
2.4
Voltage Identification (VID)
The Voltage Identification (VID) specification for the processor is defined by the Voltage
Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 11.0 Design
Guidelines. The voltage set by the VID signals is the reference VR output voltage to be
delivered to the processor Vcc pins. VID signals are CMOS outputs. Please refer to
Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 11.0 Design
Guidelines. The voltage set by the VID signals is the reference VR output voltage to be
delivered to the processor Vcc pins. VID signals are CMOS outputs. Please refer to
for the DC specifications for these signals. A voltage range is provided in
and changes with frequency. The specifications have been set such that one
voltage regulator can operate with all supported frequencies.
Individual processor VID values may be calibrated during manufacturing such that two
devices at the same core frequency may have different default VID settings. This is
reflected by the VID range values provided in
devices at the same core frequency may have different default VID settings. This is
reflected by the VID range values provided in
.
The processor uses six voltage identification signals, VID[6:1], to support automatic
selection of power supply voltages.
selection of power supply voltages.
specifies the voltage level corresponding
to the state of VID[6:1]. A ‘1’ in this table refers to a high voltage level and a ‘0’ refers
to a low voltage level. The definition provided in
to a low voltage level. The definition provided in
is not related in any way to
previous Intel
®
Xeon
®
processors or voltage regulator designs. If the processor socket
is empty (VID[6:1] = 111111), or the voltage regulation circuit cannot supply the
voltage that is requested, the voltage regulator must disable itself. See the Voltage
Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 11.0 Design
Guidelines for further details.
voltage that is requested, the voltage regulator must disable itself. See the Voltage
Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 11.0 Design
Guidelines for further details.
Although the Voltage Regulator Module (VRM) and Enterprise Voltage Regulator-Down
(EVRD) 11.0 Design Guidelines defines VID [7:0], VID 7 and VID 0 are not used on the
Intel® Xeon® Processor 7400 Series.
(EVRD) 11.0 Design Guidelines defines VID [7:0], VID 7 and VID 0 are not used on the
Intel® Xeon® Processor 7400 Series.
The Intel® Xeon® Processor 7400 Series provides the ability to operate while
transitioning to an adjacent VID and its associated processor core voltage (V
transitioning to an adjacent VID and its associated processor core voltage (V
CC
). This
will represent a DC shift in the load line. It should be noted that a low-to-high or high-
to-low voltage state change may result in as many VID transitions as necessary to
reach the target core voltage. Transitions above the specified VID are not permitted.
to-low voltage state change may result in as many VID transitions as necessary to
reach the target core voltage. Transitions above the specified VID are not permitted.
includes VID step sizes and DC shift ranges. Minimum and maximum voltages
must be maintained as shown in
.
The VRM or EVRD utilized must be capable of regulating its output to the value defined
by the new VID. DC specifications for dynamic VID transitions are included in
by the new VID. DC specifications for dynamic VID transitions are included in
. Refer to the Voltage
Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 11.0 Design
Guidelines for further details.
Guidelines for further details.
Power source characteristics must be guaranteed to be stable whenever the supply to
the voltage regulator is stable.
the voltage regulator is stable.