Intel Atom Processor N270 User Manuals

Table of Contents

• Contents

  3
• Figures

  4
• Tables

  4
• Revision History

  5
• 1 Introduction

  6
  • 1.1 Major Features

    6
  • 1.2 Terminology

    7
  • 1.3 References

    9
• 2 Low Power Features

  10
  • 2.1 Clock Control and Low-power States

    10
    • 2.1.1 Thread Low-power State Descriptions

      12
      • 2.1.1.1 Thread C0 State

        12
      • 2.1.1.2 Thread C1/AutoHALT Power-down State

        12
      • 2.1.1.3 Thread C1/MWAIT Power-down State

        13
      • 2.1.1.4 Thread C2 State

        13
      • 2.1.1.5 Thread C4 State

        13
    • 2.1.2 Package Low-power State Descriptions

      13
      • 2.1.2.1 Normal State

        13
      • 2.1.2.2 Stop-Grant State

        13
      • 2.1.2.3 Stop-Grant Snoop State

        14
      • 2.1.2.4 Sleep State

        14
      • 2.1.2.5 Deep Sleep State

        15
      • 2.1.2.6 Deeper Sleep State

        15
        • 2.1.2.6.1 Intel Enhanced Deeper Sleep State

          15
  • 2.2 Dynamic Cache Sizing

    16
  • 2.3 Enhanced Intel SpeedStep® Technology

    17
  • 2.4 Enhanced Low-Power States

    18
  • 2.5 FSB Low Power Enhancements

    19
    • 2.5.1 Front Side Bus

      19
• 3 Electrical Specifications

  20
  • 3.1 Power and Ground Pins

    20
  • 3.2 FSB Clock (BCLK [1:0]) and Processor Clocking

    20
  • 3.3 Voltage Identification

    20
  • 3.4 Catastrophic Thermal Protection

    23
  • 3.5 Reserved and Unused Pins

    23
  • 3.6 FSB Frequency Select Signals (BSEL [2:0])

    23
  • 3.7 FSB Signal Groups

    24
  • 3.8 CMOS Asynchronous Signals

    25
  • 3.9 Maximum Ratings

    25
  • 3.10 Processor DC Specifications

    26
• 4 Package Mechanical Specifications and Pin Information

  33
  • 4.1 Package Mechanical Specifications

    33
    • 4.1.1 Package Mechanical Drawings

      34
  • 4.2 Processor Pin-out Assignment

    34
  • 4.3 Signal Description

    41
• 5 Thermal Specifications and Design Considerations

  50
  • 5.1 Thermal Diode

    51
  • 5.2 Intel® Thermal Monitor

    53
  • 5.3 Digital Thermal Sensor

    55
    • 5.3.1 Out of Specification Detection

      56
    • 5.3.2 PROCHOT# Signal Pin

      56