The Unabridged Pentium 4 IA32 Processor Genealogy

Chapter 44. Intro to the Pentium^® 4 FSB

The Previous Chapter

This chapter provided a detailed description of the FSB's electrical characteristics. This included:

• The BSEL Outputs.

• The Processor's Operational Clock Frequency.

• BCLK Is a Differential Signal.

• The Address and Data Strobes.

• The Voltage ID.

• All AGTL+ Signals Are Active When Low.

• All AGTL+ Signals Are Terminated.

• Deasserting an AGTL+ Signal Line.

• Each AGTL+ Input Has a Comparator.

• The Reference Voltage.

• The Sample Point.

• The Pre-90nm Comparison.

• The 90nm Comparison.

• AGTL+ Setup and Hold Specs.

• Signals that Can Be Driven by Multiple FSB Agents.

• Minimum One BCLK Response Time.

This Chapter

This chapter introduces the Pentium® 4 FSB. It includes:

• Enhanced Mode Scalable Bus.

• FSB Agents.

• The Request Agent. ...