Lenovo LF80565QH0254M Datenblatt PDF herunterladen (Seite 17)

Document Number: 318080-002 17

Electrical Specifications

Notes:

1. Individual processors operate only at or below the frequency marked on the package.

2. Listed frequencies are not necessarily committed production frequencies.

3. For valid processor core frequencies, refer to the Dual-Core Intel® Xeon® Processor 7200 Series and

Quad-Core Intel® Xeon® Processor 7300 Series Specification Update.

4. The lowest bus ratio supported is 1/6.

2.3.1 Front Side Bus Frequency Select Signals (BSEL[2:0])

Upon power up, the FSB frequency is set to the maximum supported by the individual

processor. BSEL[2:0] are CMOS outputs that are used to select the FSB frequency.

Please refer to Table 2-11 for DC specifications. Table 2-2 defines the possible

combinations of the signals and the frequency associated with each combination. The

frequency is determined by the processor(s), chipset, and clock synthesizer. All FSB

agents must operate at the same core and FSB frequency. See the appropriate

platform design guidelines for further details.

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 Table 2-9 for DC

specifications. Refer to the appropriate platform design guidelines for decoupling and

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 asynchronous CMOS

Table 2-1. Core Frequency to FSB Multiplier Configuration

Core Frequency to FSB

Multiplier

Core Frequency with

266 MHz FSB Clock

Notes

1/6 1.60 GHz 1, 2, 3, 4

1/7 1.86 GHz 1, 2, 3

1/8 2.13 GHz 1, 2, 3

1/9 2.40 GHz 1, 2, 3

1/10 2.66 GHz 1, 2, 3

1/11 2.93 GHz 1, 2, 3

Table 2-2. BSEL[2:0] Frequency Table

BSEL2 BSEL1 BSEL0 Bus Clock Frequency

000 266 MHz

001 Reserved

010 Reserved

011 Reserved

100 Reserved

101 Reserved

110 Reserved

111 Reserved

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 141 142

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