Intel Pga478 Data Sheet - Page 16
Voltage Identification and Power Sequencing - motherboard
UPC - 735858152471
View all Intel Pga478 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 16 highlights
Intel® Celeron® Processor 1.66 GHz/1.83 GHz-Electrical Specifications 3.3.2 3.3.3 3.4 Table 3. 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. 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® Celeron® Processor 1.66 GHz/1.83 GHz core frequency is a multiple of the BCLK[01:00] frequency. The Intel® Celeron® Processor 1.66 GHz/1.83 GHz bus ratio multiplier is set at its default ratio at manufacturing. The processor uses a differential clocking implementation. Voltage Identification and Power Sequencing The VID specification for the Intel® Celeron® Processor 1.66 GHz/1.83 GHz is defined by the Embedded Voltage Regulator-Down (EmVRD) 11.0 Design Guidelines for Embedded Implementations Supporting PGA478. The Intel® Celeron® Processor 1.66 GHz/1.83 GHz uses six voltage identification pins, VID[5:0], to support automatic selection of power supply voltages. The VID pins for Intel® Celeron® Processor 1.66 GHz/1.83 GHz are CMOS outputs driven by the processor VID circuitry. Table 3 specifies the voltage level corresponding to the state of 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® Celeron® Processor 1.66 GHz/ 1.83 GHz power supply requirements, please refer to the Embedded Voltage RegulatorDown (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. Intel® Celeron® Processor 1.66 GHz/1.83 GHz VID Map (Sheet 1 of 3) VID5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 VID4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 VID3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 VID2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 VID1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 VID0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 VCC (V) OFF 1.6000 1.5875 1.5750 1.5625 1.5500 1.5375 1.5250 1.5125 1.5000 1.4875 1.4750 1.4625 1.4500 1.4375 1.4250 Intel® Celeron® Processor 1.66 GHz/1.83 GHz DS 16 January 2007 Order Number: 315876-002