Руководство по эксплуатации SMSC EVB-EMC1033

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EVB-EMC1002/EMC1033 User Manual
The information contained herein is proprietary to SMSC, and shall be used solely in accordance with the agreement pur-
suant to which it is provided. Although the information is believed to be accurate, no responsibility is assumed for inaccura-
cies. SMSC reserves the right to make changes to this document and to specifications and product descriptions at any
time without notice. Neither the provision of this information nor the sale of the described semiconduct

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EVB-EMC1002/EMC1033 User Manual 1 Overview The EMC1002 is an SMBus temperature sensing IC with 1 internal and 1 external sensor in an 8 pin MSOP package. The EMC1002 has 2 Alert/Therm2 and Addr/Therm outputs that can be configured to signal when temperatures exceed programmed limits. Resistance Error Correction can eliminate the affect of series resistance to provide a more accurate temperature reading. This is especially important for microprocessors, FPGAs, and graphics chips. The EMC1033 is a

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EVB-EMC1002/EMC1033 User Manual 2 Getting Started 2.1 System Requirements To use the EVB you will need: n A PC running Windows 2000 or XP n Display resolution 800x600 (or larger to view several windows simultaneously) n An available USB port 2.1.1 Feature Summary n Windows Register Manager application allows viewing and changing register values as well as graphing temperature history n USB communication to evaluation board n Resistive Error Correction can be demonstrated n LEDs for Alert/Therm

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EVB-EMC1002/EMC1033 User Manual Note: The Windows Register Manager application allows viewing and changing register values for a variety of EVBs including the EMC1001, EMC1002, EMC1023 and 1033. The Register Manager software only needs to be installed once to support all of these EVBs. The list of supported EVBs may be found in the readme.txt file included on the distribution CD. .. Figure 2.2 Register Manager Help Screen Revision 1.1 (12-14-06) SMSC EMC1002/EMC1033 4

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EVB-EMC1002/EMC1033 User Manual 3 Circuit Description 3.1 Introduction The EMC1002 EVB provides the means to demonstrate EMC1002/1033 features and to view and modify registers. LED Indicators and test points are included to show status information and a fan driver circuit linearly drives a 5V fan to 3 different speeds based on programmable temperature limits. 3.2 EMC1002/1033 The EMC1002 is an SMBus temperature sensor with 1 internal and 1 external sensor in an 8 pin MSOP package. The EMC1033

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EVB-EMC1002/EMC1033 User Manual 3.8 Direct SMBus Connect Option It is also possible to connect an external SMBus master to the EMC1002 EVB. A few modifications to the circuit are required: n Cut 3 traces connecting JP4 pins 3-4, 5-6 and 7-8 on the bottom side of the PCB. This will disconnect the USB bridge from the SMBus. The pullup resistors for the SMBus SDA, SCL and Alert/Therm2 signals are also disconnected so external pullups will need to be supplied by the SMBus Master. n Install P1 o

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EVB-EMC1002/EMC1033 User Manual 4 Demo Description 4.1 Register Manager Overview The Register Manager application (RegMan) initially displays the main Help screen, where detailed description of the application’s features may be found. The Help screens can be displayed at any time by selecting Help from the menubar or pressing the ? button on the toolbar. RegMan enables the user to display temperature readings, set temperature limits and read/write configuration register values. 4.2 Temperature

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EVB-EMC1002/EMC1033 User Manual Note: Asserting the Addr/Therm output low will also turn on the ARA LED on this EVB. This is because the fan driver circuit will pull down the Alert/Therm2 output when Addr/Therm is low. The SMBus ARA Protocol will not function in this case. 4.4 Fan Driver The fan driver utilizes the Alert/Therm2 and Addr/Therm outputs to drive a +5V fan to 3 different fan speeds. See the Circuit Description above for information about the fan driver. Normally, the fan driver is