Intel BX80601920 Data Sheet - Page 81

Datasheet

81

Thermal Specifications

6.3.2

PECI Specifications

6.3.2.1

PECI Device Address

The PECI register resides at address 30h.

6.3.2.2

PECI Command Support

The processor supports the PECI commands listed in

Table 6-4

.

6.3.2.3

PECI Fault Handling Requirements

PECI is largely a fault tolerant interface, including noise immunity and error checking

improvements over other comparable industry standard interfaces. The PECI client is

as reliable as the device that it is embedded in, and thus given operating conditions

that fall under the specification. The PECI will always respond to requests and the

protocol itself can be relied upon to detect any transmission failures. There are,

however, certain scenarios where the PECI is know to be unresponsive. Prior to a power

on RESET# and during RESET# assertion, PECI is not ensured to provide reliable

thermal data. System designs should implement a default power-on condition that

ensures proper processor operation during the time frame when reliable data is not

available using PECI.

To protect platforms from potential operational or safety issues due to an abnormal

condition on PECI, the Host controller should take action to protect the system from

possible damaging states. If the Host controller cannot complete a valid PECI

transactions of GetTemp0() with a given PECI device over 3 consecutive failed

transactions or a one second maximum specified interval, then it should take

appropriate actions to protect the corresponding device and/or other system

components from overheating. The host controller may also implement an alert to

software in the event of a critical or continuous fault condition.

6.3.2.4

PECI GetTemp0() Error Code Support

The error codes supported for the processor GetTemp() command are listed in

Table 6-5

.

Table 6-4.

Supported PECI Command Functions and Codes

Command

Function

Code

Comments

Ping()

N/A

This command targets a valid PECI device address followed by zero Write

Length and zero Read Length.

GetTemp0()

01h

Write Length: 1

Read Length: 2

Returns the temperature of the processor in Domain 0

Table 6-5.

GetTemp0() Error Codes

Error Code

Description

8000h

General sensor error

Section	Page
Contents	3
Figures	4
Tables	5
Intel® Core™ i7-900 Desktop Processor Extreme Edition Series and Intel® Core™ i7-900 Desktop Processor Series Features	7
Revision History	8
1 Introduction	9
1.1 Terminology	10
1.2 References	11
2 Electrical Specifications	13
2.1 Intel® QPI Differential Signaling	13
2.2 Power and Ground Lands	13
2.3 Decoupling Guidelines	13
2.3.1 VCC, VTTA, VTTD, VDDQ Decoupling	14
2.4 Processor Clocking (BCLK_DP, BCLK_DN)	14
2.4.1 PLL Power Supply	14
2.5 Voltage Identification (VID)	14
2.6 Reserved or Unused Signals	17
2.7 Signal Groups	18
2.8 Test Access Port (TAP) Connection	19
2.9 Platform Environmental Control Interface (PECI) DC Specifications	20
2.9.1 DC Characteristics	20
2.9.2 Input Device Hysteresis	21
2.10 Absolute Maximum and Minimum Ratings	21
2.11 Processor DC Specifications	22
2.11.1 DC Voltage and Current Specification	23
2.11.2 VCC Overshoot Specification	29
2.11.3 Die Voltage Validation	30
3 Package Mechanical Specifications	31
3.1 Package Mechanical Drawing	31
3.2 Processor Component Keep-Out Zones	34
3.3 Package Loading Specifications	34
3.4 Package Handling Guidelines	34
3.5 Package Insertion Specifications	34
3.6 Processor Mass Specification	35
3.7 Processor Materials	35
3.8 Processor Markings	35
3.9 Processor Land Coordinates	36
4 Land Listing	37
5 Signal Descriptions	67
6 Thermal Specifications	71
6.1 Package Thermal Specifications	71
6.1.1 Thermal Specifications	71
6.1.2 Thermal Metrology	75
6.2 Processor Thermal Features	76
6.2.1 Processor Temperature	76
6.2.2 Adaptive Thermal Monitor	76
6.2.3 THERMTRIP# Signal	79
6.3 Platform Environment Control Interface (PECI)	79
6.3.1 Introduction	79
6.3.2 PECI Specifications	81
6.4 Storage Conditions Specifications	82
7 Features	83
7.1 Power-On Configuration (POC)	83
7.2 Clock Control and Low Power States	83
7.2.1 Thread and Core Power State Descriptions	84
7.2.2 Package Power State Descriptions	85
7.3 Sleep States	86
7.4 ACPI P-States (Intel® Turbo Boost Technology)	86
7.5 Enhanced Intel® SpeedStep® Technology	87
8 Boxed Processor Specifications	89
8.1 Introduction	89
8.2 Mechanical Specifications	90
8.2.1 Boxed Processor Cooling Solution Dimensions	90
8.2.2 Boxed Processor Fan Heatsink Weight	92
8.2.3 Boxed Processor Retention Mechanism and Heatsink Attach Clip Assembly	92
8.3 Electrical Requirements	92
8.3.1 Fan Heatsink Power Supply	92
8.4 Thermal Specifications	93
8.4.1 Boxed Processor Cooling Requirements	93

Intel BX80601920 Data Sheet - Page 81

PECI Specifications

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