Intel Pentium 4 Processor on 90 nm Process

4 Datasheet
5.2.2 On-Demand Mode..................................................................................68
5.2.3 PROCHOT# Signal Pin ..........................................................................68
5.2.4 THERMTRIP# Signal Pin .......................................................................69
5.2.5 T
control
and Fan Speed Reduction..........................................................69
5.2.6 Thermal Diode........................................................................................69
6Features.......................................................................................................................71
6.1 Power-On Configuration Options ........................................................................71
6.2 Clock Control and Low Power States.................................................................. 72
6.2.1 Normal State—State 1 ...........................................................................72
6.2.2 AutoHALT Powerdown State—State 2 ..................................................72
6.2.3 Stop-Grant State—State 3 .....................................................................73
6.2.4 HALT/Grant Snoop State—State 4 ........................................................ 73
6.2.5 Sleep State—State 5..............................................................................74
7 Boxed Processor Specifications .......................................................................75
7.1 Mechanical Specifications................................................................................... 76
7.1.1 Boxed Processor Cooling Solution Dimensions.....................................76
7.1.2 Boxed Processor Fan Heatsink Weight.................................................. 77
7.1.3 Boxed Processor Retention Mechanism and Heatsink Attach
Clip Assembly ........................................................................................78
7.2 Electrical Requirements ......................................................................................78
7.2.1 Fan Heatsink Power Supply...................................................................78
7.3 Thermal Specifications........................................................................................79
7.3.1 Boxed Processor Cooling Requirements ...............................................79
7.3.2 Variable Speed Fan ...............................................................................81