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Summary of Contents for Texas Instruments National Semiconductor LM87

  • Page 1 National Semiconductor is now part of Texas Instruments. Search http://www.ti.com/ for the latest technical information and details on our current products and services.
  • Page 2 November 2000 Evaluation Board Instruction Manual LM87 Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing Copyright © 1999, 2000 National Semiconductor www.national.com - 1 -...
  • Page 3: General Description

    General Description The LM87 Design Kit allows quick connection and evaluation of the LM87 System Hardware Monitor integrated circuit. The Evaluation Board connects to and derives its power from the parallel printer port of a PC. The software was written using Visual Basic 5.0 and is compatible with PC type computers running Microsoft Windows 95 or Windows 98 operating system.
  • Page 4: Operation

    2.0 Software Launching the Program To start the software, go to the Windows ‘Start - Programs’ menu and select ‘LM87 – LM87Eval’. Operation • The software provides most of the commonly used information on the main panel. A series of menus are used to provide the following additional functions: •...
  • Page 5: Additional Information

    Basic Operation and Main Panel Functions As previously stated, clicking on the “Get All Values” button updates all value and limit displays on the main panel. Additional features of the main panel include: • Clicking in any white “Value” box causes the latest data to be displayed for that box. •...
  • Page 6 3.0 LM87 Evaluation Board Hardware Details The schematic for the LM87 evaluation board is shown in FIGURE 2. The backup battery (BT1) for the Chassis Intrusion circuitry has not been installed on the evaluation board. The recommended battery is a Panasonic BR2330-1HE with 3V nominal cell voltage and 255 mAh capacity.
  • Page 7 The 22-pin header JP6 allows access to the analog inputs, fan inputs, DAC output and Chassis Intrusion input of the LM87. The board comes shipped with shorting bars installed across the following pins: Pins 7 and 8 Pins 15 and 16 Pins 17 and 18 Pins 19 and 20 Table 2 JP6 Description...
  • Page 8 The 20 pin header JP7 allows access to VID0-VID4, RESET#, INT# and THERM# input and outputs pins of the LM87. The board comes shipped with shorting bars installed across the following pins: Pins 9 and 10 as shown in FIGURE 1. Table 3 JP7 Description Pin Number Description...
  • Page 10 4.0 LM87 Evaluation Board Bill of Materials Item Quantity Reference Part ______________________________________________ Panasonic BR2330-1HE 3V Lithium (Not included) C1,C4,C5 C2,C9 10u, 16V, 6032, 20% 0.1u, 25v, 0805, +80%, -20% C6,C7,C8 0.01u, 25V, 0805, 5% 1.0u, 25V, 6032, 20% D1-D4,D6,D7,D8 1N5817 RED LED, HLMP-K150 D9,D10 1N914...

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