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参数资料
型号： BX80552641T
厂商： INTEL CORP
元件分类： 微控制器/微处理器
英文描述： 32-BIT, 3200 MHz, MICROPROCESSOR, PBGA775
封装： FLIP CHIP, LGA-775
文件页数： 17/108页
文件大小： 3283K
代理商： BX80552641T
18
Datasheet
Electrical Specifications
2.2.3
FSB Decoupling
The processor integrates signal termination on the die. In addition, some of the high frequency
capacitance required for the FSB is included on the processor package. However, additional high
frequency capacitance must be added to the motherboard to properly decouple the return currents
from the front side bus. Bulk decoupling must also be provided by the motherboard for proper
[A]GTL+ bus operation.
2.3
Voltage Identification
The Voltage Identification (VID) specification for the processor is defined by the Voltage
Regulator-Down (VRD) 10.1 Design Guide For Desktop and Transportable LGA775 Socket. The
voltage set by the VID signals is the reference VR output voltage to be delivered to the processor
VCC lands (see Chapter 2.5.3 for VCC overshoot specifications). Refer to Table 2-13 for the DC
specifications for these signals. A minimum voltage for each processor frequency is provided in
Table 2-3.
Individual processor VID values may be calibrated during manufacturing such that two devices at
the same core speed may have different default VID settings. This is reflected by the VID Range
values provided in Table 2-3. Refer to the Intel Pentium 4 Processor Specification Update for
further details on specific valid core frequency and VID values of the processor. Note that this
differs from the VID employed by the processor during a power management event (Thermal
Monitor 2, Enhanced Intel SpeedStep technology, or Enhanced HALT State).
The processor uses 6 voltage identification signals, VID[5:0], to support automatic selection of
power supply voltages. Table 2-1 specifies the voltage level corresponding to the state of VID[5:0].
A ‘1’ in this table refers to a high voltage level and a ‘0’ refers to a low voltage level. If the
processor socket is empty (VID[5:0] = x11111), or the voltage regulation circuit cannot supply the
voltage that is requested, it must disable itself. See the Voltage Regulator-Down (VRD) 10.1 Design
Guide For Desktop and Transportable LGA775 Socket for further details.
The processor provides the ability to operate while transitioning to an adjacent VID and its
associated processor core voltage (VCC). 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.
Table 2-3 includes VID step sizes and DC shift ranges. Minimum and maximum voltages must be
maintained as shown in Table 2-4 and Figure 2-1 as measured across the VCC_SENSE and
VSS_SENSE lands.
The VRM or VRD used must be capable of regulating its output to the value defined by the new
VID. DC specifications for dynamic VID transitions are included in Table 2-3 and Table 2-4. Refer
to the Voltage Regulator-Down (VRD) 10.1 Design Guide For Desktop and Transportable LGA775
Socket for further details.
相关PDF资料
PDF描述
BX80552641T2 32-BIT, 3200 MHz, MICROPROCESSOR, PBGA775
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BX805555080P 64-BIT, MICROPROCESSOR, BGA771
BX805555080A 64-BIT, MICROPROCESSOR, BGA771
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相关代理商/技术参数
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