EMC1043-3-ACZL-TR资料

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EMC1043

1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

PRODUCT FEATURES

GENERAL DESCRIPTION

The EMC1043 is a family of System Management Bus(SMBus) temperature sensors that monitors threetemperature zones, one internal diode and twoexternally connected diodes, for PC and embeddedenvironments. The EMC1043 includes betacompensation circuitry to correct for variation in the betaof measurement transistors. Other extended featuresinclude resistance error correction and ideality factorconfiguration to eliminate major sources of temperaturemeasurement error.1

An added feature to the EMC1043 is a function thatautomatically compares the two external temperaturezones and reports the hotter of the two temperatures.Selectable conversion rates and standby mode supportlow-power operation. The temperature measurementranges support two data ranges (and formats), -°C to+127°C and -°C to +191°C.

APPLICATIONS

󰂄Desktop and Notebook Computers󰂄Hardware Management󰂄Servers

󰂄Embedded Applications

1.Patents pending

Datasheet

FEATURES

Supports two External Temperature Diodes

————

±1°C Accuracy (40°C to 80°C)0.125°C Resolution

Ideality Factor Configuration

Accepts 2200pF Cap Across External Diodes for Noise Suppression

—Optional Resistive Error Correction on External Diode 2—Resistive Error Correction (up to 100 Ohms)—Beta Compensation

󰂄

Internal Temperature Diode

—±3°C Accuracy (0°C to 85°C)—0.125°C Resolution

󰂄󰂄󰂄󰂄󰂄

Low Power Operation

—4uA Standby Current

3.0V to 3.6V Supply

Programmable Conversion RateSMBus 2.0 Compliant

—Four SMBus Address Available

Reports Hotter of Two Diodes with Dual-core CPU

SIMPLIFIED BLOCK DIAGRAM

SwitchingCurrentExternal Diode1 RegisterAnalog Muxand Anti-Alias FilterConfigurationRegisterDP1DN1DP2DN2Local TempDiode11-bitdelta-sigmaADCExternal Diode2 RegisterDigital MuxandByte InterlockInternal DiodeRegisterStatus RegisterSMBus InterfaceSMCLKSMDATASMSC EMC1043

DATASHEET

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1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

Datasheet

ORDERING INFORMATION

EMC1043-1-ACZL-TR FOR 8 PIN, MSOP PACKAGE (ADDRESS - 1001100B) (GREEN, LEAD-FREE)EMC1043-2-ACZL-TR FOR 8 PIN, MSOP PACKAGE (ADDRESS - 1001101B) (GREEN, LEAD-FREE)EMC1043-3-ACZL-TR FOR 8 PIN, MSOP PACKAGE (ADDRESS - 1001000B) (GREEN, LEAD-FREE)EMC1043-4-ACZL-TR FOR 8 PIN, MSOP PACKAGE (ADDRESS - 1001001B) (GREEN, LEAD-FREE)EMC1043-5-ACZL-TR FOR 8 PIN, MSOP PACKAGE (ADDRESS - 1001100B) (GREEN, LEAD-FREE)BETA COMPENSATION IS DISABLED ON EXTERNAL TEMPERATURE ZONE 2 OF THE EMC1043-5

Reel size is 4,000 pieces.

Evaluation Boards available upon request. (EVB-EMC1043, EVB-EMC1043C)

80 Arkay Drive

Hauppauge, NY 11788 (631) 435-6000 FAX (631) 273-3123

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to beaccurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of thisinformation does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectualproperty rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently datedversion of SMSC's standard Terms of Sale Agreement dated before the date of your order (the \"Terms of Sale Agreement\"). The product maycontain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or otherapplication where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document orother SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is aregistered trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respectiveholders.

SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIEDWARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE,AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA,PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT;NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDYOF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGES.

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DATASHEET

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1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

Datasheet

Table of Contents

Chapter1Pin Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Chapter2Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.12.22.3

Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7System Management Bus Interface Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.3.1Write Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.3.2Read Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.3.3Send Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.3.4Receive Byte. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.3.5SMBus Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10SMBus Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10SMBus Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.42.5

Chapter3Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.13.23.3

Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12One Shot During Standby Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Operation During Run Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.3.1Conversion Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.3.2Dynamic Averaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Temperature Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Temperature Measurement Results and Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Resistance Error Correction (REC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Beta Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Programmable Ideality Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Diode Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.43.53.63.73.83.9

Chapter4Register Set and Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.14.24.34.44...74.84.94.104.11

Legacy Temperature Data Registers (00h, 23h, 01h, 10h, F8h, F9h) . . . . . . . . . . . . . . . . . . . . . . 19Extended Format Temperature Registers (FAh-FDh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Status Register - 02h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Configuration Register (03h Read, 09h Write) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Configuration 2 Register - (04h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21One Shot Register - (0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Ideality Configuration Registers (27h - 28h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Beta Configuration Registers (29h - 2Ah). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Product ID Register (EDh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Manufacturer ID Register (FEh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Revision Register (FFh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Chapter5Package Outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.1

Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

SMSC EMC1043

DATASHEET

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1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

Datasheet

List of Figures

Figure1.1Figure2.1Figure3.1Figure3.2Figure3.3Figure3.4Figure5.1

EMC1043 Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6System Management Bus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9EMC1043 Dual-Core System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11EMC1043-5 Mixed System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Block Diagram of Temperature Monitoring Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14External Diode Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148-Pin MSOP Package Outline - 3x3mm Body 0.65mm Pitch. . . . . . . . . . . . . . . . . . . . . . . . . 25

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1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

Datasheet

List of Tables

Table1.1EMC1043 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table2.1Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Table2.2Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Table2.3Write Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Table2.4Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Table2.5Send Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Table2.6Receive Byte Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Table3.1Supply Current vs. Conversion Rate and ADC Averaging Factor. . . . . . . . . . . . . . . . . . . . . . 13Table3.2EMC1043 Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Table4.1EMC1043 Register Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Table4.2Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Table4.3Configuration Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table4.4Conversion Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table4.5Configuration 2 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Table4.6One Shot Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Table4.7Ideality Configuration Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Table4.8Ideality Factor Look Up Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Table4.9Beta Configuration Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Table4.10Beta Configuration Look Up Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Table4.11Product ID Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Table4.12Manufacturer ID Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Table4.13Revision Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Table5.18-Pin MSOP Package Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

SMSC EMC1043

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1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

Datasheet

Chapter1 Pin Function

DP1DN1DP2DN212348SMCLKSMDATAVDDGND8-MSOP765Figure1.1 EMC1043 Pin DiagramTable1.1 EMC1043 Pin Description

PINDP1DN1DP2DN2GNDVDDSMDATASMCLK

PIN NO.

12345678

DESCRIPTION

External Diode 1 Positive (anode) ConnectionExternal Diode 1 Negative (cathode) ConnectionExternal Diode 2 Positive (anode) ConnectionExternal Diode 2 Negative (cathode) ConnectionGroundSupply Voltage

System Management Bus Data - bi-directional data, open drain outputSystem Management Bus Clock Input

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1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

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Chapter2 Electrical Specifications

2.1

Absolute Maximum Ratings

Table2.1 Absolute Maximum Ratings

DESCRIPTION

Supply Voltage VDD

Voltage on SMDATA and SMCLK pinsVoltage on any other pinOperating Temperature RangeStorage Temperature RangeLead Temperature Range

Package Thermal Characteristics for MSOP-8

Thermal Resistance TJA(at 0 air flow)

ESD Rating, All Pins Human Body Model

135.92000

°C/WV

RATING-0.3 to 5.0-0.3 to 5.5-0.3 to VDD+0.3-40 to 125-55 to 150Refer to JEDEC Spec. J-STD-020

UNITVVV°C°C

Note:Stresses above those listed could cause damage to the device. This is a stress rating only and

functional operation of the device at any other condition above those indicated in the operationsections of this specification is not implied. When powering this device from laboratory orsystem power supplies, it is important that the Absolute Maximum Ratings not be exceeded ordevice failure can result. Some power supplies exhibit voltage spikes on their outputs when theAC power is switched on or off. In addition, voltage transients on the AC power line may appearon the DC output. If this possibility exists, it is suggested that a clamp circuit be used.

2.2 Electrical Specifications

Table2.2 Electrical Characteristics

VDD=3.0V to 3.6V, TA= 0°C to +85°C, Typical values at TA = 27°C unless otherwise noted

PARAMETER

DC PowerSupply Voltage

Average Operating Current

SYMBOLMINTYPMAXUNITSCONDITIONS

VDDIDDISTBY

3.03.33402

3.004

VμAμA

4 conversions/sSee Table4.4.Standby mode

Internal Temperature MonitorTemperature AccuracyTemperature Resolution

± 10.125

± 3

°C°C

0°C≤TA≤85°C

SMSC EMC1043

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Table2.2 Electrical Characteristics (continued)

VDD=3.0V to 3.6V, TA= 0°C to +85°C, Typical values at TA = 27°C unless otherwise noted

PARAMETER

External Temperature MonitorTemperature Accuracy

Remote Diode 40°C to 80°CRemote Diode 0°C to 125°CTemperature ResolutionFilter Capacitor

SYMBOLMINTYPMAXUNITSCONDITIONS

± 1± 3

0.125

CFILTER

2.2

°C°C°CnF

15°C≤TA≤70°C0°C≤TA≤85°C

Connected across external diodeNote2.2

Voltage Tolerance

Voltage at pin ( SMDATA,SMCLK)SMBus Interface (SMDATA,SMCLK)Input High LevelInput Low LevelInput High/Low CurrentHysteresisInput CapacitanceOutput Low Sink CurrentSMBus TimingClock FrequencySpike SuppressionBus free time Start to StopHold time StartSetup time StartSetup time StopData Hold TimeData Setup TimeClock Low PeriodClock High PeriodClock/Data Fall TimeClock/Data Rise Time

TBUFTHD:STATSU:STATSU:STOTHD:DATTSU:DATTLOWTHIGHTFTR

1.30.60.60.60.31001.30.6**

300300Note2.1400

FSMB

40050

kHznsμsμsμsμsμsnsμsμsnsns

*Min = 20+0.1Cb ns*Min = 20+0.1Cb ns

VIHVILIIH/IIL

-1

5005

2.0

0.81

VVμAmVpFmA

SMDATA = 0.6V

VTOL

-0.3

5.5

Capacitive Load (each bus line)

Note2.1

0.6pF

300nS rise time max is required for 400kHz bus operation. For lower clock frequencies,the maximum rise time is (0.1/FSMB)+50nS

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Note2.2

See SMSC Applications for Application Notes and Guidelines when measuring GPUprocessor diodes and CPU processor diodes.

2.3 System Management Bus Interface Protocol

A host controller, such as an SMSC I/O controller, communicates with the EMC1043 via the two wireserial interface named SMBus. The SMBus interface is used to read and write registers in theEMC1043, which is a slave-only device. A detailed timing diagram is shown in Figure2.1.

TLOWTHIGHTHD:STATFTSU:STOSMCLKTHD:STATRTHD:DATTSU:DATTSU:STASMDATATBUFPSS - Start ConditionSP - Stop ConditionPFigure2.1 System Management Bus Timing Diagram

The EMC1043 implements a subset of the SMBus specification and supports Write Byte, Read Byte,Send Byte, and Receive Byte protocols as shown. In the tables that describe the protocol, the “gray”columns indicate that the slave is driving the bus.All of the below protocols use the following convention:

DATA SENT TO DEVICE# of bits sent

DATA SENT TO THE HOST# of bits sent

2.3.1

Write Byte

The Write Byte is used to write one byte of data to the registers as shown in Table2.3.

Table2.3 Write Byte Protocol

START

SLAVE ADDRESS

ACK

COMMAND

ACK

DATA

ACK

STOP

171181811

2.3.2Read Byte

The Read Byte protocol is used to read one byte of data from the registers as shown in Table2.4.

Table2.4 Read Byte Protocol

START

SLAVE ADDRESS

ACK

COMMAND

ACK

START

SLAVE ADDRESS

ACK

DATA

NACK

STOP

SMSC EMC1043

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2.3.3Send Byte

The Send Byte protocol is used to set the Internal Address Register to the correct Address as shownin Table2.5. The Send Byte can be followed by the Receive Byte protocol described in Table2.6 toread data from the register. The send byte protocol cannot be used to write data - if data is to bewritten to a register then the write byte protocol must be used as described in Section2.3.1.

Table2.5 Send Byte Protocol

START1

SLAVE ADDR

WR1

ACK1

REG. ADDR

ACK1

STOP1

2.3.4Receive Byte

The Receive Byte protocol is used to read data from a register when the internal register addresspointer is known to be at the right location (e.g. set via Send Byte). This can be used for consecutivereads of the same register as shown in Table2.6.

Table2.6 Receive Byte Protocol

START1

SLAVE ADDR

RD1

ACK1

REG. DATA

NACK1

STOP1

2.3.5SMBus Timing Diagram

The Timing for the SMBus is shown in Figure2.1.

2.4 SMBus Addresses

The EMC1043 may be ordered with one of four slave addresses as shown in Ordering Information.Attempting to communicate with the EMC1043 SMBus interface with an invalid slave address or invalidprotocol results in no response from the device and does not affect its register contents. The EMC1043supports stretching of the SMCLK signal by other devices on the SMBus but will not perform thisoperation itself.

2.5 SMBus Timeout

The EMC1043 includes an SMBus time-out feature. Following a 25 ms period of inactivity on theSMBus, the device will time-out and reset the SMBus interface.

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Chapter3 Product Description

The EMC1043 is an SMBus sensor that monitors three temperature zones for use in a personalcomputer or embedded environment. The part may be used as a companion to one of SMSC’s broadline of SIO host devices to perform fan control and thermal management.

The EMC1043-1, EMC1043-2, EMC1043-3 and EMC1043-4 are designed specifically to work with aCPU that implements the thermal diode as a PNP substrate transistor with the collector connected toGND. A new feature called beta compensation automatically compensates for measurement errorcaused by beta variation in CPU thermal diodes as described in Section3.7.

Because the beta compensation circuit is designed to work with PNP substrate transistors, theEMC1043-1, EMC1043-2, EMC1043-3 and EMC1043-4 are not typically used with diode-connectedtransistors (such as the 2N3904) or CPUs that implement the thermal diode as a two-terminal diode(such as the AMD processor). However, the beta compensation feature may be disabled by configuringthe appropriate register as described in Section4.8. For applications that measure a two-terminalthermal diode, refer to the EMC1063.A typical system is shown in Figure3.1.

The EMC1043-5 is designed to operate with a single substrate thermal diode and a discrete thermaldiode such as a 2N3904. A typical system for this mixed system is shown in Figure3.2.

CPUCore1Core2EMC1043DP1DN1DP2DN2InternalDiodeHostSMBusSMBusInterfaceFigure3.1 EMC1043 Dual-Core System

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CPUThermalDiodeEMC1043-5DP1DN1HostSMBusDP2DN2InternalDiodeSMBusInterfaceRemote diode-connected transistorFigure3.2 EMC1043-5 Mixed System

3.1 Power Modes

The EMC1043 has two power modes.

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Run Mode - In this mode, the temperature monitors are active and converting at the programmed conversion rate. The average power dissipation will depend on the conversion rate. When the EMC1043 is not actively converting a channel, it goes into a lower power wait state.

Standby Mode (power-up default) - in this mode, the EMC1043 is put into a low power state. In the standby mode, temperature monitoring is disabled. The device will still respond to SMBus commands.

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3.2 One Shot During Standby Mode

The EMC1043 supports a One-Shot command when it is in Standby Mode. Writing to the One-Shotregister will cause the device to power up, perform 1 full set of temperature conversions, then returnto Standby Mode.

3.3 Operation During Run Mode

When the device is active, there are two modes of operation available.

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Normal Mode (power-up default) - In this mode of operation, the EMC1043 continuously samples and updates all of its temperature channels.

Hotter of Two Mode - In this mode, the EMC1043 continuously samples and then compares the two remote zones. The hotter of the two remote zones is loaded into the External Diode 2 Data Registers. In addition, the HOTTER bit in the Status register is set or cleared to indicate which external diode zone is hotter. If the two remote zones are exactly equal to each other, then the HOTTER bit is cleared (set to ‘0’), and the results of the two remote zones are stored in their respective registers.

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3.3.1Conversion Rates

The EMC1043 may be configured for different conversion rates based on the system requirements.The available rates are 1 full set of conversions per second to 16 full sets of conversions per second.The conversion rate is configured as described in Section4.4. The available conversion rates areshown in Table4.4.

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3.3.2Dynamic Averaging

The EMC1043 temperature channels support a new feature that measures the external diode channelsfor an extended time based on the selected conversion rate. This functionality can be disabled asdescribed in Section4.5 for increased power savings at the lower conversion rates. When DynamicAveraging is enabled, the device will automatically adjust the sampling and measurement time for bothexternal diode channels. This allows the device to average 2x or 4x longer than the normal 11 bitoperation while still maintaining the selected conversion rate. The benefits of Dynamic Averaging areimproved noise rejection due to the longer integration time as well as less random variation on thetemperature measurement.

The Dynamic Averaging applies when a One-Shot command is issued. The device will perform thedesired averaging during the one-shot operation according to the selected conversion rate.

The Dynamic Averaging will affect the average supply current based on the chosen conversion rateas shown in Table3.1.

Table3.1 Supply Current vs. Conversion Rate and ADC Averaging Factor

ADC AVERAGING FACTOR

(MAX_RES = 1)(DA_n = 0)160uA250uA440uAN/AN/A

120uA175uA275uA525uAN/A

(MAX_RES = 0)(DA_n = 0)

CONVERSION RATE1 / sec2 / sec4 / sec8 / sec16 / sec

1X(DA_n = 1)100uA135uA200uA320uA565uA

3.4 Temperature Monitors

In general, thermal diode temperature measurements are based on the change in forward bias voltageof a diode when operated at two different currents. This ΔVBE is then proportional to absolutetemperature as shown in the following equation:

where:

ΔVBE=VBE_HIGH−VBE_LOW=ηkT⎛IHIGH⎞⎟ln⎜⎟⎜q⎝ILOW⎠k = Boltzmann’s constant

T = absolute temperature in Kelvinq = electron charge

[1]

η = diode ideality factor

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ILOWIHIGHSubstratePNPDPResistanceErrorCorrectionDNAnti-AliasingFilterΔΣADCFigure3.3 Block Diagram of Temperature Monitoring Circuit

Figure3.3 shows a block diagram of the temperature measurement circuit. The negative terminal forthe remote temperature diode, DN, is internally biased with a forward diode voltage referenced toground.

The EMC1043-1, EMC1043-2, EMC1043-3 and EMC1043-4 are designed to work with the PNPsubstrate transistor in a CPU. The External Diode 2 channel in the EMC1043-5 has beta compensationdisabled by default.

The external diodes in all versions of the EMC1043 are compatible with a broad range of thermaldiodes that may be connected as shown in Figure3.4 (see Section4.8 for programming details whenusing diode-connected transistors as the external diodes).

toDPtoDNtoDPtoDPtoDNLocal GroundTypical remotesubstrate transistori.e. CPU substrate PNPTypical remotediscrete PNP transistori.e. 2N3906Typical remotediscrete NPN transistori.e. 2N3904toDNFigure3.4 External Diode Configurations

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3.5 Temperature Measurement Results and Data

Each temperature result for each zone is available in two byte wide data registers. As shown inSection4.1, the 11-bit format has the 8 most significant bits stored in the high byte register and the 3least significant bits stored in the three MSB positions of the low byte register. The delta-sigma ADCmay be operated with more than 11 bits of resolution for improved averaging as described inSection4.5, but the temperature result is reported at 11-bit resolution.

The temperature results for the two remote zones are also stored in extended format with a range from-°C to +191°C. The data format is a 2’s complement number offset by °C as shown in Section4.2.The data for each of the remote zones in both legacy and extended format is stored in separate dataregisters so that both data formats are always available. Table3.2 shows the default and extendedrange formats.

Table3.2 EMC1043 Temperature Data Format

RANGE -°C TO 127°C

TEMPERATURE (°C)

BINARY

RANGE -°C TO 191°C

OFFSET BINARY

Diode Fault<= --63.875-63-100.125165127127.875128191>= 191.875

100 0000 0000110 0000 0000110 0000 0001110 0000 1000111 1111 1000000 0000 0000000 0000 0001000 0000 1000010 0000 0000010 0000 1000011 1111 1000011 1111 1111011 1111 1111011 1111 1111011 1111 1111

100 0000 0000100 0000 0000100 0000 0001100 0000 1000101 1111 1000110 0000 0000110 0000 0001110 0000 1000000 0000 0000000 0000 1000001 1111 1000001 1111 1111010 0000 0000011 1111 1000011 1111 1111

3.6 Resistance Error Correction (REC)

Resistance error correction is an automatic feature that eliminates the need to characterize andcompensate for series resistance in the external diode lines. The EMC1043 corrects for as much as100 ohms of series resistance.

When using a temperature sensor that does not include resistance error correction, voltage developedacross the parasitic resistance in the external diode path produces an error in the reportedtemperature. The error introduced by this resistance is approximately +0.7°C per ohm. Sources ofseries resistance are PCB trace resistance, on die (i.e. on the processor) metal resistance, bulkresistance in the base and emitter of the temperature transistor.

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When monitoring the thermal diode of an AMD K8 processor, the Resistance Error Correction must bedisabled for accurate temperature measurements. This is accomplished by clearing the REC bit in theconfiguration 2 register (see Section4.5). Please see Application note “13.16 - Using the EMC1043with AMD Processors” for more details.

3.7 Beta Compensation

The Beta Compensation function automatically eliminates temperature errors caused by beta variationin modern, low beta transistors used for monitoring processor temperatures. Changes in beta asdiffering currents are applied to temperature transistors can cause significant temperature errors inmonitoring devices. As modern processor geometries shrink the trend is for transistor betas todecrease, which exacerbates temperature errors.

Discrete transistors, with collector connected to base to form a diode, are generally immune to thesetemperature errors because of high (>100) betas. A beta variation of 10% from low current to highcurrent, when beta equals 100, induces approximately 0.12° error at 100°C. However for a low beta(1.0) substrate transistor used for processor temperature measurement, a beta variation of 10% fromlow to high current induces approximately 6.12° error at 100°C.

Because the Beta Compensation function is designed to be used with substrate PNP transistors only,this function should be disabled when using a diode-connected transistor (such as the 2N3904) orCPUs that implement the thermal diode as a two-terminal device. The Beta Compensation function isdisabled by writing 07h to the Beta Configuration register

When measuring an AMD K8 processor, the Beta Compensation circuitry must be disabled. SeeSection4.8. Please see SMSC Application note “13.16 - Using the EMC1043 with AMD Processors”for more details.

3.8 Programmable Ideality Factor

The EMC1043 default is for a diode ideality factor of 1.008 which is common for a 2N3904 diode andfor many processor transistors. When a diode or transistor is used that has a different ideality factorvalue than 1.008 a temperature error is induced that is a linear function of temperature. Previoussolutions for this mismatch in ideality factor has been to supply a programmable offset to thetemperature reading which corrects the error at a single temperature but causes a residual error at allother temperatures. The EMC1043 ideality factor register corrects this mismatch error at alltemperatures (see Section4.7).

3.9 Diode Faults

The EMC1043 detects a fault if the DP pin is left floating or is shorted to VDD. In the case of a diodefault, the corresponding status bit will be set and the output data will be set at 400h.

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1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

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TLUAUELFEAhhhhhhhhhDV0000000000000000000B111111B222222B444443B888884B666661111155555B2222211.211.2.2.23030303036B55522.422.4.4.46060606067Bnnng5g5g5858Si..20Si.0Si.20101LOLLBLLLLEEMHBBLHBLBHBLBHBELBHBTT1122112SYNNTTTTTTTIIEEEEEEE htewtth h egaMErroahawtgwgIuyuy HimLmgmoaAtct rHirLmHioLH Naaac r1o o rrra1o F21 1 F2o F d d2d egeg Fe eee Rpepee mLdyedyeydeee -mLdyocococdcdaoaonddddTE - aTeeTeDigDiagDiggeonont t e ee eDi eDi xDietDiet x xtISyGaltalytalLalLalLLn Banan -n al al Etaltal-n-n-n-r r r r r an E-an Et-r rREehmrw Bmreeeeeeeeeemeemr attttttttttrttreemttrtgretnooxyxyxyxyxyxyIHioFnILFEBEBEBEBEBooxyFEBFEBoFW/RRRRRRRRRR RTEIRTEW/A/A/A/A/A/A/A/A/ANNNNNNNNNISRESSGDDDREAAhhhhhhhhhRE0310C0201FFFAFBFDATASHEET

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TLUEAUL))FA88 00 hhhhhh0h0hDEV005902.2.30040011(11(00B1dDe00roBBts e1BMPb t2OoD CRECn11 BB>ll>0wi0: 2:<22DATASHEET

SMSC EMC1043

Table4.1 EMC1043 Register Set (continued) 元器件交易网www.cecb2b.com

1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

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Table4.1 EMC1043 Register Set (continued)

WRITE

R/W

SYMBOL

DEFVA

2AhR/W

External Diode 2 Beta BCF2Configuration

-----BETA<2:0>

03h EMC5)

0101011

EDh

Product ID

PID

000

FEhFFh

Manufacturer IDRevision Register

SMSCREV

000001-

000010-

000001-

1111110

0011000

h0E

h5Dh01h

During Power on Reset (POR), the default values are stored in the registers. A POR is initiated whenpower is first applied to the part and the voltage on the VDD supply surpasses the POR level asspecified in the electrical characteristics. Any reads to undefined registers will return 00h. Writes toundefined registers will not have an effect.

The EMC1043 uses an interlock mechanism that will update the Low byte of a particular monitor whenthe High Byte is read. This prevents changes in register content when the ADC updates betweensuccessive reads.

4.1

Legacy Temperature Data Registers (00h, 23h, 01h, 10h, F8h, F9h)

As shown in Table4.1, each temperature monitor has two data registers. The 11 bit temperature datais stored aligned to the left resulting in the High Byte containing temperature in 1°C steps and the LowByte containing fractions of a degree.

4.2 Extended Format Temperature Registers (FAh-FDh)

The Extended Format Temperature Registers store only the external diode temperatures in theextended data format. This is because, due to the operating range limitations of the EMC1043, theinternal temperature could not benefit from the extended temperature range. Like the Legacy dataformatting, the data is stored in two registers per temperature channel.

4.3

Status Register - 02h

Table4.2 Status Register

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

02hStatusBusy--HOTTER--D2D100h

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The Status Register is a read only register and returns the operational status of the part. External diodefaults are indicated by bits 1 and 0. If either bit is set to ‘1’, then a diode fault has occurred. When adiode fault occurs, the D1 or D2 status bit is set, but otherwise the data remains unchanged.Bit 7 - Busy - indicates that the ADC is currently converting a temperature.

Bit 4 - HOTTER - during Hotter of Two mode, this bit indicates which of the external diode channelsis hotter. If this bit is ‘0’, then External Diode 1 is hotter or equal to External Diode 2. If this bit is ‘1’,then External Diode 2 is hotter than External Diode 1. During normal operation, this bit will always reada ‘0’.

Bit 1 - D2 - indicates that a diode fault has occurred on External Diode 2.Bit 0 - D1 - indicates that a diode fault has occurred on External Diode 1.

4.4 Configuration Register (03h Read, 09h Write)

Table4.3 Configuration Register

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

03h Read, Config09h Write

-STANDBY---CR<2:0>45h

The Configuration Register controls the basic functionality of the EMC1043. The bits are describedbelow:

Bit 6 - STANDBY- controls the ADC conversions and power modes of the part.

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'0' - The device is in the run operating mode. The ADC is converting at the user-programmed conversion rate.

'1' - (default) The device is in the standby operating mode (see Section3.1).

󰂄

Bit 2-0 - CR<2:0> - determines the conversion rate for the temperature monitoring per Table4.4.

Table4.4 Conversion Rate

CR<2:0>

CONVERSIONS / SECOND (CONVERSION TIME)

00001111

00110011

01010101

ReservedReservedReserved

1 Conversion / sec2 Conversions / sec

4 Conversions / sec (default) 8 Conversions / sec16 Conversions / sec

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4.5 Configuration 2 Register - (04h)

Table4.5 Configuration 2 Register

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

04hCFG2----MAX_RESDA_nCOMPREC09h

The Configuration 2 Register controls the basic functionality of the EMC1043 that is NOT compatiblewith the EMC1023.

Bit 3 - MAX_RES - controls the external diode conversion time during dynamic averaging. Althoughthe dynamic averaging may be used to increase the ADC resolution, only 11 bits of data are availablein the temperature registers.

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‘0’ - the dynamic averaging will set the ADC averaging factor at 1x when the conversion rate is set at 16 conversions per second and 2x at conversion rates lower than 16 per second.

‘1’ (default) - the dynamic averaging will set the ADC averaging factor at 1x when the conversion rate is set at 16 conversions per second, 2x at 8 conversions / second and 4x at conversion rates lower than 8 per second.

󰂄

Bit 2 - DA_n - controls the dynamic digital averaging circuitry. See Section3.3.2.

󰂄

‘0’ (default) - dynamic averaging is enabled. Depending on the selected conversion rate, the ADC averaging factor is increased for the external diodes.

‘1’ - dynamic averaging is disabled. The ADC averaging factor will remain fixed at 1x for all conversion rates and will allow increased power savings at the slower conversion rates.

󰂄

Bit 1 - COMP - configures the device to perform a comparison for the Hotter of Two mode (see Section3.3, \"Operation During Run Mode,\" on page12.)

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‘0’ (default) - the device is in normal mode

‘1’ - the device is in Hotter of Two mode. In this mode, the two external diode channels are

measured and compared against each other. The hotter of the two channels has its data loaded into the External Diode 2 Data Registers. The Internal Diode and External Diode 1 Data Registers remain unaffected.

Bit 0 - REC - controls the Resistance Error Correction circuitry

󰂄󰂄

'0' - - The Resistance Error Correction circuitry is disabled.

'1' (default) - The Resistance Error Correction circuitry is active and will automatically correct for up to 100 ohms of series resistance in the diode lines for both External Diode 1 and External Diode 2 channels.

4.6 One Shot Register - (0Fh)

Table4.6 One Shot Registers

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

0Fh

One Shot ConversionWriting to this register address initiates the one-shot. The data is not important and is not stored

00h

The One Shot Register is an address place holder for the one-shot command. Writing to the addressinitiates the command. The data written is not important and is not stored. Reading from the one-shotregisters will always return 00h.

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4.7 Ideality Configuration Registers (27h - 28h)

Table4.7 Ideality Configuration Registers

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

27h28h

Diode 1 Ideality Correction FactorDiode 2 Ideality Correction Factor

B5B5

B4B4

B3B3

B2B2

B1B1

B0B0

12h(1.008)12h(1.008)

The Ideality Configuration Registers store the ideality correction factor that is applied to each externaldiode.

The table below shows the ideality factor settings for the Ideality Configuration registers. Shadingindicates power-up default. All codes that are not listed are reserved and should not be used.

Table4.8 Ideality Factor Look Up Table

SETTING

FACTOR

SETTING

FACTOR

SETTING

FACTOR

001000001001001010001011001100001101001110001111010000010001010010010011010100010101010110010111

0.99510.990.99760.991.00021.00151.00281.00411.001.00671.00801.00931.01061.01191.01331.0146

011000011001011010011011011100011101011110011111100000100001100010100011100100100101100110100111

1.01591.01731.01861.01991.02131.02261.02401.02531.02671.02801.02941.03081.03211.03351.03491.0363

101000101001101010101011101100101101101110101111110000110001

1.03771.03911.04041.04181.04321.04461.04601.04751.041.0503

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4.8

Beta Configuration Registers (29h - 2Ah)

Table4.9 Beta Configuration Registers

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

29h2Ah

Diode 1 Beta ConfigurationDiode 2 Beta Configuration

BETA<2:0> 03h

(07h for EMC1043-5)

The Beta Configuration Registers have a factory programmed power-on default based on the beta ofthe PNP substrate transistor that is being monitored as the external diode. The default value of theDiode 2 Beta Configuration Register of EMC1043-5 is 07h (disabled).

The beta compensation circuit is able to compensate for beta variation within a given range. The betaconfiguration register is configured to the proper range to match the CPU to be monitored. The betavalues should be set so that the minimum expected beta is not below the threshold indicated inTable4.10. Beta compensation is activated if the BETA<2:0> bits are set to any value other than 07h.When using diode-connected transistors (such as the 2N3904) or CPUs that implement the thermaldiode as a two-terminal diode, the Beta Configuration Register should be set to 07h.

Table4.10 Beta Configuration Look Up Table

BETA<2:0>

MINIMUM BETA

00001111

00110011

01010101

0.110.180.25

0.33 (default) 0.431.002.33Disabled

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4.9 Product ID Register (EDh)

Table4.11 Product ID Register

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

EDhPID00X011XX

0C(-1)0D (-2)0E (-3)0F (-4)2C (-5)

The Product ID Register holds the unique product ID for identifying SMSC EMC products. SeeTable4.1 for a list of the product ID number for each version of the EMC1043.

4.10 Manufacturer ID Register (FEh)

Table4.12 Manufacturer ID Register

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

FEhSMSC010111015Dh

The Manufacturer ID register contains an 8 bit word that identifies the manufacturer of the EMC1043(SMSC = 5Dh).

4.11 Revision Register (FFh)

Table4.13 Revision Register

ADDRREGISTERB7B6B5B4B3B2B1B0DEFAULT

FFhREV----000101h

The Revision register contains a 4 bit word that identifies the die revision.

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Chapter5 Package Outline

Figure5.1 8-Pin MSOP Package Outline - 3x3mm Body 0.65mm Pitch

Table5.1 8-Pin MSOP Package Parameters

MIN

NOMINAL

MAX

REMARKS

AA1A2DEE1HLL1e

0.800.050.752.804.652.800.080.40

~~0.853.004.90~~~0.95 REF0.65 BSC

1.100.150.953.205.153.200.230.80

Overall Package Height

StandoffBody ThicknessX Body SizeY SpanY body SizeLead Foot ThicknessLead Foot LengthLead LengthLead Pitch

Wccc

0o0.22~

~~~

8o0.380.10

Lead Foot AngleLead WidthCoplanarity

Notes:

1.Controlling Unit: millimeters.

2.Tolerance on the true position of the leads is ± 0.065 mm maximum.

3.Package body dimensions D and E1 do not include mold protrusion or flash. Dimensions D and

E1 to be determined at datum plane H. Maximum mold protrusion or flash is 0.15mm (0.006 inches)per end, and 0.15mm (0.006 inches) per side.

4.Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane.5.Details of pin 1 identifier are optional but must be located within the zone indicated.

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5.1 Package Markings

All devices will be marked on the first line of the top side with “1043”. On the second line, they will bemarked with version (V), revision (R) and country of origin (CC) resulting in a four letter code of(VRCC).

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