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NE80546PG0801M
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Datasheet 
Electrical Specifications
2.2.3
FSB Clock (BCLK[1:0]) and Processor Clocking
BCLK[1:0] directly controls the FSB interface speed as well as the core frequency of the processor. 
As in previous generation processors, the processor core frequency is a multiple of the BCLK[1:0] 
frequency. No user intervention is necessary, and the processor will automatically run at the speed 
indicated on the package. The processor uses a differential clocking implementation.
2.3
Voltage Identification
The VID specification for the processor is supported by the Voltage Regulator-Down (VRD) 10.0 
Design Guidelines for Desktop Socket 478
. 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.
Individual processor VID values may be calibrated during manufacturing such that two devices at 
the same speed may have different VID settings.
The processor uses six voltage identification pins, VID[5:0], to support automatic selection of 
power supply voltages. 
 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 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) 10.0 Design 
Guidelines for Desktop Socket 478 
for more details.
Power source characteristics must be guaranteed to be stable when the supply to the voltage 
regulator is stable.
The processor’s Voltage Identification circuit requires an independent 1.2 V supply and some other 
power sequencing considerations.
Table 2.  Core Frequency to FSB Multiplier Configuration
Multiplication of System 
Core Frequency to FSB 
Frequency
Core Frequency 
(133 MHz BCLK/533 MHz FSB)
Core Frequency 
(200 MHz BCLK/800 MHz FSB)
Notes
1/14
RESERVED
2.80E GHz
1/15
RESERVED
3E GHz
1/16
RESERVED
3.20E GHz
1
NOTES:
1.
Individual processors operate only at or below the rated frequency.
1/17
RESERVED
3.40E GHz
1/18
RESERVED
RESERVED
1/19
RESERVED
RESERVED
1/20
RESERVED
RESERVED
1/21
2.80A GHz
RESERVED