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Document Number: 318080-002 105
Thermal Specifications
to reach the target operating voltage. Each step will be one VID table entry (see
Table 2-3). The processor continues to execute instructions during the voltage
transition. Operation at the lower voltage reduces the power consumption of the
processor.
A small amount of hysteresis has been included to prevent rapid active/inactive
transitions of the TCC when the processor temperature is near its maximum operating
temperature. Once the temperature has dropped below the maximum operating
temperature, and the hysteresis timer has expired, the operating frequency and
voltage transition back to the normal system operating point. Transition of the VID
code will occur first, in order to ensure proper operation once the processor reaches its
normal operating frequency. Refer to Figure 6-6 for an illustration of this ordering.
The PROCHOT# signal is asserted when a high temperature situation is detected,
regardless of whether Thermal Monitor or Thermal Monitor 2 is enabled.
6.2.4 On-Demand Mode
The processor provides an auxiliary mechanism that allows system software to force
the processor to reduce its power consumption. This mechanism is referred to as “On-
Demand” mode and is distinct from the Thermal Monitor and Thermal Monitor 2
features. On-Demand mode is intended as a means to reduce system level power
consumption. Systems utilizing the Intel
®
Xeon
®
Processor 7200 Series and 7300
Series must not rely on software usage of this mechanism to limit the processor
temperature. If bit 4 of the IA32_CLOCK_MODULATION MSR is set to a ‘1’, the
processor will immediately reduce its power consumption via modulation (starting and
stopping) of the internal core clock, independent of the processor temperature. When
using On-Demand mode, the duty cycle of the clock modulation is programmable via
bits 3:1 of the same IA32_CLOCK_MODULATION MSR. In On-Demand mode, the duty
cycle can be programmed from 12.5% on/ 87.5% off to 87.5% on/12.5% off in 12.5%
increments. On-Demand mode may be used in conjunction with the Thermal Monitor;
however, if the system tries to enable On-Demand mode at the same time the TCC is
engaged, the factory configured duty cycle of the TCC will override the duty cycle
selected by the On-Demand mode.
Figure 6-6. Thermal Monitor 2 Frequency and Voltage Ordering
Vcc
Temperature
V
NOM
Frequency
Time
f
TM2
f
MAX
T
TM2
V
TM2
T(hysterisis)
Vcc
Temperature
V
NOM
Frequency
Time
f
TM2
f
MAX
T
TM2
V
TM2
T(hysterisis)
- Processor 7200 Series 1
- Contents 3
- 4 Document Number: 318080-002 4
- Document Number: 318080-002 5 5
- 6 Document Number: 318080-002 6
- Document Number: 318080-002 7 7
- Revision History 8
- 1 Introduction 9
- 1.1 Terminology 11
- Introduction 12
- 1.2 State of Data 13
- 1.3 References 13
- 2 Electrical Specifications 15
- Clocking 16
- 2.3.2 PLL Power Supply 17
- Electrical Specifications 18
- Table 2-4. FSB Signal Groups 21
- Asynchronous Signals 22
- 2.9 Mixing Processors 23
- CC_VTT_OUT 27
- Time Duration (s) 28
- Sustained Current (A) 28
- Table 2-10. V 30
- Load Lines 32
- Static and Transient 34
- Tolerance Load Lines 34
- Specifications 35
- 2.11.2.1 DC Characteristics 36
- 2.11.3 V 37
- Overshoot Specification 37
- Example Overshoot Waveform 38
- Tp = T1: BCLK[1:0] period 47
- THERMTRIP# 51
- Figure 2-26. VID Step Timings 54
- 3 Mechanical Specifications 57
- Mechanical Specifications 58
- 3.7 Processor Materials 67
- 3.8 Processor Markings 68
- Processor 69
- 4 Pin Listing 71
- 10 of 16) 75
- 11 of 16) 76
- 12 of 16) 76
- 13 of 16) 77
- 14 of 16) 77
- 15 of 16) 78
- 16 of 16) 78
- 1 of 14) 79
- 2 of 14) 79
- 3 of 14) 80
- 4 of 14) 80
- 5 of 14) 81
- 6 of 14) 81
- 8 of 14) 82
- 7 of 14) 82
- 9 of 14) 83
- 10 of 14) 83
- 11 of 14) 84
- 12 of 14) 84
- 13 of 14) 85
- 14 of 14) 85
- Pin Listing 86
- 5 Signal Definitions 87
- CC and BCLK have reached 92
- 6 Thermal Specifications 95
- CASE_MAX 96
- Thermal Profile 98
- = 0.162 x Power + 45 98
- Pow er (W) 100
- Temperature (C) 100
- = 0.420 x Power + 45 100
- = 0.238 x Power + 45 101
- 6.1.2 Thermal Metrology 102
- 6.2.2 Thermal Monitor 103
- 6.2.3 Thermal Monitor 2 104
- 6.2.4 On-Demand Mode 105
- 6.2.5 PROCHOT# Signal 106
- 6.2.6 FORCEPR# Signal 106
- 6.2.7 THERMTRIP# Signal 106
- 6.3.1 Introduction 107
- 6.3.2 PECI Specifications 108
- 7 Features 111
- 7.2.1 Normal State 112
- EXTENDED_HALT 113
- 7.2.3 Stop-Grant State 114
- 7.3 Enhanced Intel SpeedStep 115
- Technology 115
- Features 116
- 7.4.1 SMBus Device Addressing 117
- Transactions 118
- 7.4.3.1 Header 121
- 7.4.3.2 Processor Data 125
- 7.4.3.3 Processor Core Data 126
- 16h-19h 127
- 1Ah-1Bh 127
- Offset: 1Ch 128
- 1Dh-1Eh 128
- 1Fh-20h 128
- 7.4.3.4 Cache Data 129
- 7.4.3.5 Package Data 131
- 7.4.3.6 Part Number Data 132
- 38h-3Eh 133
- 3Fh-4Ch 133
- 4Dh=54h 133
- 55h-6Eh 134
- 71h-72h 134
- 7.4.3.8 Feature Data 135
- 7.4.3.9 Other Data 136
- 7.4.4 Checksums 137
- 7.4.5 Scratch EEPROM 137
- 8.1 Introduction 139
- 8.2 Thermal Specifications 139
- 9 Debug Tools Specifications 141
- Debug Tools Specifications 142
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