Voltage Identification And Power Sequencing; Intel ® Celeron ® Processor 1.66 Ghz/1.83 Ghz Vid Map - Intel Pga478 - P4-2ghz 512kb 400mhz Fsb Datasheet

3.3.2 FSB AGTL+ Decoupling
The processor integrates signal termination on the die as well as incorporate high
frequency decoupling capacitance on the processor package. Decoupling must also be
provided by the system motherboard for proper AGTL+ bus operation.
3.3.3 FSB Clock (BCLK[1:0]) and Processor Clocking
BCLK[01:00] directly controls the FSB interface speed as well as the core frequency of
the processor. As in previous generation processors, the Intel
1.66 GHz/1.83 GHz core frequency is a multiple of the BCLK[01:00] frequency. The
®
Intel Celeron
ratio at manufacturing. The processor uses a differential clocking implementation.
3.4

Voltage Identification and Power Sequencing

The VID specification for the Intel
by the Embedded Voltage Regulator-Down (EmVRD) 11.0 Design Guidelines for
Embedded Implementations Supporting
The Intel
VID[5:0], to support automatic selection of power supply voltages. The VID pins for
®
Intel Celeron
processor VID circuitry.
VID[5:0]. A '1' in this refers to a high-voltage level and a 0 refers to low-voltage level.
For more details about VR design to support the Intel
1.83 GHz power supply requirements, please refer to the
Down (EmVRD) 11.0 Design Guidelines for Embedded Implementations Supporting
PGA478.
Power source characteristics must be stable whenever the supply to the voltage
regulator is stable.
®
Table 3. Intel Celeron
VID5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
® ®
Intel Celeron Processor 1.66 GHz/1.83 GHz
DS
16
®
Intel Celeron
®
Processor 1.66 GHz/1.83 GHz bus ratio multiplier is set at its default
® ®
Celeron Processor 1.66 GHz/1.83 GHz uses six voltage identification pins,
®
Processor 1.66 GHz/1.83 GHz are CMOS outputs driven by the
Table 3 specifies the voltage level corresponding to the state of
®
Processor 1.66 GHz/1.83 GHz VID Map (Sheet 1 of 3)
VID4 VID3
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
®
Processor 1.66 GHz/1.83 GHz—Electrical Specifications
® ®
Celeron Processor 1.66 GHz/1.83 GHz is defined
PGA478.
®
Celeron
VID2 VID1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
® ®
Celeron Processor
®
Processor 1.66 GHz/
Embedded Voltage Regulator-
VID0 V
CC
0 OFF
1 1.6000
0 1.5875
1 1.5750
0 1.5625
1 1.5500
0 1.5375
1 1.5250
0 1.5125
1 1.5000
0 1.4875
1 1.4750
0 1.4625
1 1.4500
0 1.4375
1 1.4250
January 2007
Order Number: 315876-002
(V)