MIC280 Evaluation Board and DemoWare Software Micrel MIC280 Evaluation Board DemoWare™ Software If a non-PC host is used, the following items are required for use with the MIC280 evaluation board: • 3.3V, 100mA regulated power supply • Power supply leads or cables • SMBus™/I2C™ compatible serial bus host for communication with the MIC280 • Cable for serial host connection, as appropriate In either case, the following additional items are useful, but not required: • Logic probe(s) • Voltmeter(s) • SMBus/I2C bus analyzer • Component cooling spray • Heat gun General Description of the Evaluation Board This board demonstrates use of the MIC280 Precision IttyBitty Thermal Supervisor. It is designed to support rapid prototyping of circuits employing the MIC280. A MMBT3906 transistor (surface mount equivalent to 2N3906) is included on the board in order to demonstrate the MIC280’s ability to measure the temperature of a remote PN junction. A connector permits use of an external remote diode or transistor in place of the on-board remote transistor. User configurable jumpers select the remote sensor connections and the voltage source for powering the MIC280. An LED reports the status of the MIC280’s interrupt request output when enabled. For use with Micrel’s DemoWare demonstration software, the MIC280 Evaluation Board may be connected directly to a PC parallel port via a DB25M connector. As an option, the user may install a four-pin ACCESS.bus™ type connector to interface the evaluation board with a serial bus host such as the IPort™ I2C Host Adapter from MCC Corporation. An additional general-purpose 5-pin header can also be used to interface any I2C/SMBus host to the board. General Description The Micrel MIC280 evaluation board and DemoWare™ software demonstrate the operation and features of the MIC280 Precision IttyBitty™ Thermal Supervisor. The MIC280 is a versatile digital thermal supervisor capable of measuring internal temperature and remote temperature. This manual describes how to use the evaluation board and the companion software. Getting Started What is Included Review the packing list in Table 1 to confirm that you received all listed items. If any of the items are missing or damaged, contact Micrel Semiconductor. The latest version of all Micrel data sheets may be obtained from our website at www.micrel.com. Item 1 2 3 4 Qty 1 Description MIC280 Evaluation Board with Jumpers Installed 1 MIC280 Evaluation Board and DemoWare Software Manual (this document) 1 MIC280 Data Sheet 2 MIC280-0BM6 Samples Table 1. Packing List What You Must Provide If the board is to be used with the MIC280 DemoWare, no additional items are required except for a suitable host PC. All power for the board will be drawn from the PC parallel port. The board may be plugged directly into the DB25 connector on the host PC. It may be more convenient, however, to use a cable between the PC and the board. A standard, straightthrough, DB25 male-to-female cable may be used. The MIC280 DemoWare software may be downloaded from Micrel’s website at http://www.micrel.com. Instructions for installing this software are included. DemoWare is a trademark of Micrel, Inc. IttyBitty is a trademark of Micrel, Inc. SMBus is a trademark of Intel Corporation. I2C is a trademark of Philips Electronics N.V. ACCESS.bus is a trademark of the ACCESS.bus Industry Group. IPort is a trademark of Microcomputer Control Corporation. Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com February 2002 1 MIC280 Evaluation Board MIC280 Evaluation Board and DemoWare Software General-Purpose Signal Header E X T V D D Micrel Optional SMBus Host Connector VDD Input Selection Jumpers INT JP2 JP3 JP4 G N D I N T C L K D BUS VDD A T A EXT JP1 280 VDD P1 EXT VDD /INT TP6 J2 GND JP5 Test Points TP2 LED ON VDD TP1 GND U1 TP7 DATA TP3 Test Points Q1 Micrel, Inc. 408-944-0800 MIC280 Evaluation Board CLK TP4 T1 Q1 GND /INT Remote Sensor Connection JP6 TP5 J1 PC Parallel Port Connector Figure 1. MIC280 Evaluation Board Serial Bus Host Connector The optional user-installed SMBus host connector is Molex part #15-83-0064 shown in Figure 2. This Molex connector is a 4-conductor shielded receptacle. The pinout of this connector is shown below. The mating connector is a Molex part #1583-1564. See Appendix A for more information on these connectors. The serial bus signals are also present on singlerow header P1 and at test points TP3 and TP4. One or more of these connection points can be used in lieu of the specialized connector. The various serial bus connection points are summarized in Table 2. Powering the Board The MIC280 evaluation board can be powered via the host PC’s parallel printer port or an external power supply. Three options are available for powering the evaluation board. Option 1: For use with Micrel’s DemoWare demonstration software and a host PC, connect the board to the PC’s parallel printer port via the DB-25M connector (refer to schematic in the Hardware Reference section). Pins 1 and 2 of JP1 should be shorted. Option 2: The board can be powered by an external power supply via TP6 and TP7 test points. The positive connection should be made to TP6 and the ground connection should be made to TP7. Pins 2 and 3 of JP1 should be shorted. Option 3: The board can be powered by a serial bus host such as the MCC IPort™ via an optional user-installed 4-pin Molex connector, J2. Pin 3 of this connector is assigned to carry the power supply voltage from the host. (See Figure 2) Pins 1 and 2 of JP1 should be shorted. FRONT CLK VDD 3 4 DATA GND 2 1 Molex 15-83-0064 Figure 2. Pinout of J2 Serial Bus Host Connector MIC280 Evaluation Board 2 February 2002 MIC280 Evaluation Board and DemoWare Software Micrel Remote Diode Selection Jumper Setting On-Board Remote Diode Q1 Short Pin 1 and 2 of JP6 Off-Board Remote Diode Connect the off-board diode to Pin 2 and 3 of JP6. Molex 15-83-0064 Pin # P1 Pin # TestPoint Serial Data 2 5 TP3 Serial Clock 4 4 TP4 VDD 3 1 TP1 Table 4. Remote Diode Selection Factory Settings The MIC280-0BM6 is used for the evaluation board. Its slave address is 1001000b = 48h. Remote on-board diode Q1 is used for remote temperature measurement. Pins 2 and 3 of JP2, JP3, and JP4 are shorted to pull DATA, CLK, and /INT up to the MIC280’s VDD voltage. Signal GND 1 2 TP2 /INT N/A 3 TP5 Table 2. Serial Bus Connection Points Personal computer based host adapters, cables, bus analyzers and other useful items can be obtained from the sources listed in Appendix A. Pull-Up Voltage for /INT, DATA and CLK The DATA, CLK and /INT pins of MIC280 can be pulled up to either the SMBus voltage or to MIC280 VDD voltage. JP2, JP3 and JP4 are used for setting the pull-up voltage for /INT, DATA and CLK respectively. Table 3 summarizes the jumper selection required for setting the pull-up voltage. Some host adapters have internal pull-up resistors. Often these resistors can be switched on and off. Be sure to check the status of the host adapter’s pull-ups, if any, before setting JP2/3/4. Voltage Level /INT DATA Q1 Twisted-Pair Cable E T1 B GND JP6 C Figure 3a. Remote Transistor Connection via JP6 CLK (3.3V) MIC280 VDD voltage 2-3 of 2-3 of 2-3 of JP2 Shorted JP3 Shorted JP4 Shorted (3.3V to 5V) SMBus voltage 1-2 of 1-2 of 1-2 of JP2 Shorted JP3 Shorted JP4 Shorted Q1 Shielded Twisted-Pair Cable Typical PNP bipolar transistor used as remote sensor E T1 B GND JP6 Table 3. Pull-Up High Voltage for DATA, CLK and /INT Pins C Figure 3b. Remote Transistor Connection Using Twisted Pair Cable via JP6 Remote Diode Selection The MIC280 can sense the temperature of a remote PN junction connected to the T1 pin. This PN junction is generally either a diode-connected bipolar junction transistor or the embedded thermal diode inside an integrated circuit such as a CPU. A diode-connected 2N3906-type transistor, Q1, is provided on the evaluation board. An off-board PN junction can be used for temperature measurement by connecting it to pin 2 and 3 of JP6. (Refer to Table 4.) Figure 3 shows several examples of remote diode connections. To minimize noise pickup, connections to an off-board diode should be made using twisted-pair or shielded twistedpair cable. Connections longer than a few inches or any connection in an electrically noisy environment should use shielded twisted-pair cable for optimal performance. (Note that the shield should be grounded only at JP6 on the evaluation board.) Suitable cable types include Belden’s part number 8442 unshielded twisted-pair (UTP) and Belden’s part number 8451 shielded twisted-pair (STP). If using a transistor, the base and collector should be shorted together at the transistor. The emitter and base-collector terminals are then connected to JP6. The emitter is connected to pin 2 of JP6; the base-collector junction should be connected to pin 3 of JP6. February 2002 Typical PNP bipolar transistor used as remote sensor Twisted-Pair Cable or Shielded Twisted-Pair Cable (shielded twisted-pair cable shown) Q1 Embedded thermal diode (in CPU, etc.) E T1 B GND JP6 C Figure 3c. Embedded Thermal Diode Connection via JP6 3 MIC280 Evaluation Board MIC280 Evaluation Board and DemoWare Software Micrel Hardware Reference Terminals Designator P1 JP6 J1 J2 Test Points Designator TP1 TP2 TP3 TP4 TP5 TP6 TP7 Description General purpose signal header Off-board remote sensor connection PC Parallel port connector, DB25M, for use with Micrel DemoWare software. Optional serial bus host connector, 4-pin Jumper Options Jumper Position JP1 1-2 2-3 JP2 1-2 2-3 JP3 1-2 2-3 JP4 1-2 2-3 JP5 Shorted Open JP6 1-2 Open Description VDD Ground Serial Data Serial Clock Interrupt External VDD Ground Function Use VDD from PC parallel port (output of MIC5207 LDO) Use External VDD via TP6, JP1, or P1 Use VDD from J2 or PC port as pull-up voltage for /INT Use MIC280 VDD as pull-up voltage for /INT Use VDD from J2 or PC port as pull-up voltage for DATA Use MIC280 VDD as pull-up voltage for DATA Use VDD from J2 or PC port as pull-up voltage for CLK Use MIC280 VDD as pull-up voltage for CLK Enables LED Disables LED On-board transistor Q1 is used as remote sensor. Connect remote diode between 2-3 for off-board sensor connection. Factory Setting Shorted Open Shorted Open Shorted Open Shorted Open Shorted Shorted * Pin number one of each header is denoted by a square pad on the PCB versus a round pad for all other pins. The pads are visible on the back side of the printed circuit board. MIC280 Evaluation Board 4 February 2002 MIC280 Evaluation Board and DemoWare Software Micrel Bill of Materials Item Part Number Manufacturer Description Qty. C1 ECS-F1CE105K Panasonic - ECG 1µF, 16V, tantalum capacitor 1 C2 ECU-S1H104KBB Panasonic - ECG 0.1µF, 50V, 20% ceramic capacitor 1 C3 K222J15C0GF5TL2 BC Components 2200pF, 50V, 5% ceramic capacitor 1 C4 ECS-F1CE225K Panasonic - ECG 2.2µF, 16V, tantalum capacitor 1 D1 MA741-(TX) Panasonic - SSG Schottky diode, 30V, 30MA, S-MINI, 3-pin 1 D2 MA741-(TX) Panasonic - SSG Schottky diode, 30V, 30MA, S-MINI, 3-pin 1 D3 MA741-(TX) Panasonic - SSG Schottky diode, 30V, 30MA, S-MINI, 3-pin 1 D4 MA741-(TX) Panasonic - SSG Schottky diode, 30V, 30MA, S-MINI, 3-pin 1 J1 DB25M Any Male parallel port connector 1 J2 15-83-0064 Molex SMBus host connector 1 JP1 Any Any 3-pin header 1 JP2 Any Any 3-pin header 1 JP3 Any Any 3-pin header 1 JP4 Any Any 3-pin header 1 JP5 Any Any 2-pin header 1 JP6 Any Any 3-pin header 1 P1 Any Any 5-pin header 1 LED1 LTL-4203 Lite-On Inc. Red LED 1 Q1 MMBT3906 Motorola PNP transistor, SOT-23 1 Q2 2N3906 Motorola PNP transistor, TO-92 1 R1 CFR-25JB-10K Yageo 10kΩ, 1/4W, 5% resistor 1 R2 CFR-25JB-10K Yageo 10kΩ 1/4W, 5% resistor 1 R3 CFR-25JB-10K Yageo 10kΩ 1/4W, 5% resistor 1 R4 ZOR-25-B Yageo 0Ω 1/4W, 5% resistor 1 R5 CFR-25JB-22K Yageo 22kΩ 1/4W, 5% resistor 1 R6 CFR-25JB-330R Yageo 330Ω 1/4W, 5% resistor 1 TP1 1502-2 Keystone Electronics Turret terminal 1 TP2 1502-2 Keystone Electronics Turret terminal 1 TP3 1502-2 Keystone Electronics Turret terminal 1 TP4 1502-2 Keystone Electronics Turret terminal 1 TP5 1502-2 Keystone Electronics Turret terminal 1 TP6 1502-2 Keystone Electronics Turret terminal 1 TP7 1502-2 Keystone Electronics Turret terminal 1 U1 MIC280BMM Micrel Semiconductor Local/Remote Thermal Supervisor 1 U2 MIC5207-3.3BZ Micrel Semiconductor 180mA Low Noise LDO Regulator 1 February 2002 5 MIC280 Evaluation Board MIC280 Evaluation Board and DemoWare Software Micrel Schematic TP6 JP1 External VDD 3 2 1 1 TP1 1 Header 3 OUT GND U2 MIC5207-3.3BZ VDD P2 VDD 3 2 1 2 IN 3 Pin Header P3 3 2 1 VDD P4 3 2 1 VDD 3 Pin Header 3 Pin Header R1 10kΩ R2 10kΩ Test Point TP2 GND 1 1 JP5 2 1 R4 0Ω C4 2.2µF/16V GND Test Point SMBUSVDD 3 2 Pin Header R3 10kΩ P1 EXT VDD GND /INT CLK DATA 1 EXTVDD TP7 C1 1µF 5 4 3 2 1 C2 0.1µF R5 Q2 MMBT3906 22kΩ TP3 5 Pin Header R6 330Ω DATA 1 MIC280 1 6 VDD /INT 2 GND DATA 5 3 T1 CLK 4 Test Point 4 3 2 1 TP4 CLK C3 2200pF 1 Test Point LED1 /INT U1 J2 Molex 15-83-0064 (71565 Family) 13 25 12 24 11 23 10 22 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2 14 1 TP5 INT 1 Test Point Q1 MMBT3906 D2 BAT85 D1 BAT85 Remote On-Board Sensor JP6 3 2 1 3 Pin Header Remote Off-Board Sensor Connection (Dedicated Trace) D3 BAT85 D4 BAT85 J1 DB25 MIC280 Evaluation Board 6 February 2002 MIC280 Evaluation Board and DemoWare Software Micrel PC Board Layout PC Board Layout - Top Silkscreen PC Board Layout - Component Side PC Board Layout - Solder Side February 2002 7 MIC280 Evaluation Board MIC280 Evaluation Board and DemoWare Software Micrel MIC280 DemoWare™ Software System Requirements The DemoWare software is designed to run on any personal computer running Microsoft Windows 95, Windows 98, and compatible operating systems. A standard parallel printer port is required for communication with the MIC280 evaluation board. (The software requires direct access to the parallel printer port at the hardware level. Operating systems such as Windows NT and Windows 2000 do not permit such access.) Once decompressed and installed, the DemoWare files will occupy approximately 1.7MB of hard disk space. Installing the Software The MIC280 DemoWare is available for download at: http://www.micrel.com. If you are unable to obtain the software from the Micrel website, please contact a Micrel sales representative for assistance. To install the MIC280 DemoWare: 1. Download the file “MIC280dwzip.exe” into a temporary directory. This file is a self-extracting ZIP archive containing the files MIC280DemoWare.exe and Mfc42.dll. MIC280DemoWare.exe is the program itself. Mfc42.dll is a library containing code used by MIC280DemoWare.exe. 2. Start the extraction process by selecting Run on the Start menu and choosing the file MIC280DemoWare.exe. MIC280DemoWare.exe and Mfc42.dll will be extracted and saved into a subdirectory named MIC280DemoWare in the root directory of the hard disk. If you wish to use a different directory, enter its name in the “Unzip to folder” text box or select the Browse option. This directory will be created if necessary. 3. Select “Unzip” and the files will be extracted. 4. A message stating “2 file(s) unzipped successfully” will be displayed when the process is finished. Click “OK” to proceed. 5. Click “Close” to complete the process and exit the installation utility. Running the Software Launch the software by selecting Run on the Start menu and selecting the file MIC280DemoWare.exe. If the installation defaults were used, this file will be in a subdirectory called “MIC280DemoWare” in the root directory on the hard disk. Once the program starts, the main window will be displayed and power to the evaluation board will be off. Any status or error messages displayed are not valid until the software is properly configured and the board is powered on. Figure 4. MIC280 DemoWare Main Window Figure 5. Selecting The Printer Port Figure 6. Selecting the Device Type and Base Address Figure 7. Selecting the Chart Recorder Scale Figure 8. Turning on Power to the Evaluation Board MIC280 Evaluation Board 8 February 2002 MIC280 Evaluation Board and DemoWare Software Micrel Using the Software The software must be configured prior to use: 1. Select the printer port to which the board will be connected using the Port item on the Configure Menu as shown in Figure 5. 2. Select the device base address using the Device item on the Configure menu as shown in Figure 6. The factory populates the evaluation board with a MIC280-0BM6. The base address therefore defaults to 0x48. 3. Adjust the chart recorder scale using the Scale item on the Configure menu. (Figure 7) Only temperature values between Upper Scale Limit and Lower Scale Limit will be displayed in the chart recorder window. Enter the desired values in the text boxes. Clicking the Get Current button or any of the temperature acquisition buttons will automatically turn on power to the board. The power may also be turned on using the Device Power item on the Configure menu, as shown in Figure 8. When power is on, a checkmark will appear next to Device Power on the Configure menu. (In any case, the power should be turned off before removing the board from the PC by selecting the Device Power item on the Configure menu!) Once power is turned on, the MIC280 registers will be read and the current values will be displayed. The main window should now appear similar to Figure 4. The main window has several components: • Temperature acquisition buttons and chart recorder (Figure 11): A single temperature sample may be taken by clicking the MANUAL button. Automatic temperature samples can be taken at specific intervals by clicking the .5s, 1s, 2s, 5s, 10s, or 20s button. Any temperature samples taken will be displayed in the chart recorder area. Data for Zone 0, the internal zone, will be plotted in green, data for Zone 1, the external zone, will be plotted in blue. • Status line (Figure 10): Status messages are displayed on the status line, including the state of the serial bus link, the logic state of the /INT pin, and the states of the Shift Lock and Num Lock keys. • Thermometer display (Figure 9): The two thermometers will display the reported temperature in degrees Centigrade, binary and hexadecimal format for both zones. • Register display (Figure 12): The Internal Temperature Limits and Remote Temperature Limits are displayed. The Mask register bits and Status register bits are also displayed. The Mask register bits must be set to allow the corresponding interrupt event to occur. The Set New button must always be used to write any changes to the part. Interrupt events are handled either by clicking the Read Status or Read ARA button. Always click the Read Status button after using the Read ARA button. February 2002 • Control display (Figure 13): The Set New button, Get Current button, Reset button and INTERRUPT indicator are displayed in this box. The Set New button must always be used to write any changes to the part. Clicking Get Current updates the display of MIC280 register values. The Reset button initiates a warm reset on MIC280, returning it to its power-up state. The INTERRUPT indicator shows the current state of the MIC280’s /INT output. Interrupts can be handled by either reading STATUS by clicking Read Status or by clicking the Read ARA button. Always click the Read Status button after using the Read ARA button. Figure 9. Thermometer Displays Figure 10. Status Line Figure 11. Temperature Acquisition Window 9 MIC280 Evaluation Board MIC280 Evaluation Board and DemoWare Software Micrel Figure 12. Register Display Figure 14. Resolution and Fault Queue Figure 13. Control Buttons Figure 15. Security Lock Figure 16. Register Values MIC280 Evaluation Board 10 February 2002 MIC280 Evaluation Board and DemoWare Software Micrel Acquiring Temperature Data Logging Data to a File All temperature data acquired during a given period may be logged to a file by activating the recording function. Recording is started by selecting the Record to File... item on the File menu. 1. Configure the device as desired via the register display window. 2. Click Set New to update the MIC280’s configuration. 3. Activate data logging by selecting the Record to File... item on the File menu. Enter the desired file and path name and click Save. Note that the log file is a comma-delimited or *.csv file. 4. Acquire temperature data by clicking the .5s, 1s, 2s, 5s, 10s, 20s, or MANUAL buttons. 5. When finished recording data, stop data logging by once again selecting the Record to File... item on the File menu. Micrel Data Log File created 07/27/2001 15:48:38 DATE TIME ELAPSED SAMPLE INTERNAL REMOTE 7/27/01 15:48:38 0 0 23 24.4375 7/27/01 15:48:39 542 1 23 24.4375 7/27/01 15:48:39 1091 2 23 24.4375 7/27/01 15:48:40 1611 3 23 24.4375 7/27/01 15:48:42 3661 4 23 24.5 7/27/01 15:48:42 3673 5 23 24.4375 7/27/01 15:48:42 3687 6 23 24.4375 7/27/01 15:48:42 3742 7 23 24.4375 7/27/01 15:48:42 4291 8 23 24.4375 7/27/01 15:48:43 4840 9 23 24.4375 7/27/01 15:48:44 5342 10 23 24.4375 7/27/01 15:48:44 5884 11 23 24.4375 7/27/01 15:48:45 6433 12 23 24.4375 Single Conversions Clicking the MANUAL button will cause a single temperature reading to be acquired from each zone. These readings will be displayed on the appropriate thermometer display and plotted on the chart recorder in the appropriate color. It will also be recorded to the log file if data logging is turned on. See “Logging Data To a File” below. Periodic Sampling Clicking any one of .5s or 1s or 2s or 5s or 10s or 20s buttons will initiate repetitive temperature sampling at the indicated interval. The data acquired will be displayed on the appropriate thermometer display and plotted on the chart recorder in the appropriate color. The samples will also be recorded to the log file if data logging is turned on. Viewing and Modifying Registers Displaying Current Values The current values of the Internal and Remote temperature limits and mask bit settings can be displayed at any time by clicking the Get Current button. Restoring Register Defaults Clicking the reset button will return all registers to their default values. Setting Temperature Limits and Mask Bits The internal and remote temperature limit registers can be modified by typing the desired values into the Low, High and Critical edit boxes for each zone and then clicking the Set New button. Individual interrupt events are enabled by setting the appropriate Mask Bits box and then pressing the Set New button. The Set New button must always be used to write new values to the MIC280 after any setting is modified on the screen. Interrupt Handling Pending interrupts are indicated by the INTERRUPT indicator button. Interrupts are handled by either clicking the Read Status button or the Read ARA button. Read Status must always be used after reading the ARA using Read ARA. This resets the MIC280’s interrupt logic, permitting /INT to be activated for the next event. Updated status bits are displayed on clicking Read Status. When an interrupt occurs, the corresponding bit is cleared in the interrupt mask register, IMASK. Setting the mask bit(s) and clicking Set New will allow future interrupts to occur. Figure 17. Example Data Log An example data file is shown in Figure 17. This file may be opened in a program such as Microsoft Excel for graphing, filtering, sorting, manipulation, etc. The first line of the file identifies the file and the time and date when it was created. The second line lists the field names for the succeeding lines. The fields are as follows (in order): • DATE: The date, according to the PC’s system clock, that the sample was taken. • TIME: The time, according to the PC’s system clock, that the sample was taken. • ELAPSED: The total elapsed time, in milliseconds, since the first sample was taken. • SAMPLE: The sample number; samples are numbered sequentially starting with one. • INTERNAL: The measured temperature for the internal zone, zone 0. • REMOTE: The measured temperature for the remote zone, zone 1. Changing Resolution and Fault Queue Resolution and fault queue settings can be made by selecting the Configuration item in the Registers menu. See Figure 14. Configuration Locking The lock bits can be altered by selecting the Lock item in the Registers menu. See Figure 15. Displaying All Register Values The values of all the MIC280 registers can be displayed by selecting the ALL item on the Registers menu. February 2002 11 MIC280 Evaluation Board MIC280 Evaluation Board and DemoWare Software Micrel Molex Incorporated 2222 Wellington Court Lisle, IL 60532-1682 Tel.: 800/78MOLEX, 630-969-4550 (Outside USA) Fax: 630-968-8356 Tel.: 254069 E-mail: [email protected] http://www.molex.com Appendix A: SMBus Resources* PC host adapters and software, bus analyzers, cables, and other items can be purchased from: Micro Computer Control Corporation PO Box 275/ 17 Model Ave. Hopewell, New Jersey 08525 USA Tel.: 609-466-1751 Email: [email protected] http://www.mcc-us.com The current SMBus specification and other information regarding SMBus may be obtained from the SMBus website http://www.smbus.org. Saelig Company Tel.: 716-425-3753 Fax: 716-425-3835 Email: [email protected] http://www.memo.com/saelig The 4-conductor serial bus connector is available from Molex as part number 15-83-0064. Mating plugs for constructing cable assemblies are also available. A list of distributors is available on the Molex website. MICREL INC. TEL *Micrel does not necessarily endorse or recommend any of the products, services, or information sources listed above. Micrel is not affiliated in any way with any listed company, person, or other entity. The above information is presented without warranty of any kind. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB USA http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2002 Micrel Incorporated MIC280 Evaluation Board 12 February 2002