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SE7221BK1-E Technical Product Specification
5
3. Functional Architecture
This chapter provides a high-level description of the functionality distributed between the
architectural blocks of the Intel® Server Board SE7221BK1-E.
3.1 Processor Subsystem
The Intel® Server Board SE7221BK1-E supports Intel® Pentium® 4 and Celeron® D
processors in the 775-land package, which is a follow on to Pentium® 4 and Celeron® D
processors in the 478-pin package, with enhancements to the Intel® NetBurst® micro-
architecture. Intel® Pentium® 4 and Celeron® D processors built on 90nm process technology
in the 775-land package utilize Flip-Chip Land Grid Array (FC-LGA4) package technology, and
plug into a 775-land LGA socket, referred to as the LGA775 socket. Pentium® 4 and Celeron®
D processors in the 775-land package, like their predecessors in the 478-pin package, are
based on the same Intel® 32-bit micro-architecture and maintain the tradition of compatibility
with IA-32 software. Specific models of the Pentium® 4 Processor in the LGA775 package
support Intel® EM64T (Extended Memory 64 Technology) for 64bit native mode operation with
64bit operating systems. The Intel® Celeron® Processor currently does not support EM64T.
3.1.1 Processor VRD
The Intel® Server Board SE7221BK1-E has a VRD (Voltage Regulator Down) to support one
processor. It is compliant with the VRM 10.1 DC-DC Converter Design Guide Line and provides
a maximum of 120A, which is capable of supporting the requirements for Intel® Pentium® 4 and
Intel® Celeron® D processors.
The board hardware must monitor the processor VTTEN (Output enable for VTT) pin before
turning on the VRD. If the VTTEN pin of the processors is not identical the Power ON Logic will
not turn on the VRD.
3.1.2 Reset Configuration Logic
The BIOS determines the processor stepping, cache size, etc through the CPUID instruction.
The requirements are as follows:
Processors run at a fixed speed, but can be programmed by BIOS to operate at a lower
or higher speed.
The processor information is read at every system power-on.
Note: The processor speed is the processor power on reset default value. No manual processor
speed setting options exist either in the form of a BIOS setup option or jumpers.
3.1.3 Processor Module Presence Detection
SE7221BK1-E does not support this function.
3.1.4 Processor Support
The Intel® Server Board SE7221BK1-E supports one processor in the LGA775 package. The
support circuitry on the server board consists of the following: