LM86EVAL

1 LM86, LM89, LM89-1, LM90, LM99, LM99-1 Evaluation Board User’s Guide Copyright 2003 National Semiconductor Corporation 1 2 Table of Contents 1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3, 4 2.0 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 2.2 2.3 2.4 2.5 Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Test Setup – Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Test Setup - Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Test Setup – System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.0 Connection Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.0 Schematic of LMxx Evaluation Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5.0 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2 3 1.0 Introduction The LMxxEVAL kit (xx = 86, 89, 89-1, 90, 99, 99-1) includes the following items: 1. The LMxx Evaluation Board (for LM86, LM89, LM89-1, LM90, LM99, LM99-1 products) 2. The SensorEval Software CD, including a. the readme.txt file (read this first) b. the installation setup file, c. the SensorEval Software manual, and d. this manual. The LMxx Evaluation Board, as shown in Figure 1, is a complete PCBA (printed circuit board assembly). The board has a USB connector, a voltage regulator circuit, a microcontroller, an EEPROM, and a LMxx Remote Diode Temperature Sensor. A schematic and bill of materials is included in this User’s Guide. Figure 1 shows the location of pin1 for the device under test. Pin 1 LMxx Figure 1. The LMxx Evaluation Board showing pin 1 3 4 1.0 Introduction (Continued) The LMxxEVAL kit includes the SensorEval software, which is provided by National Semiconductor to communicate with the LMxx Evaluation Board by way of the USB cable (not provided) from the controlling computer. The SensorEval software is used to control the writing and reading of the digital registers in the LMxx for doing the initial register setup, reading the local and remote temperatures, establishing certain temperature limit setpoints. For the installation procedure for the SensorEval software see the readme.txt file on the SensorEval software CD. For detailed use of the LMxx software used with the LMxx Evaluation Board, please refer to the SensorEval software user’s guide on the CD. The LMxx datasheet is available at www.national.com. 2.0 Getting Started 2.1 Required Equipment In order to use the LMxx Evaluation Board you will need to have the following required pieces of equipment: 1. A computer with at least a Pentium III processor, running Microsoft Windows operating system, with 20 MB of free disk space, and at least one USB port 98/2000/XP1 2. A standard USB cable (3 foot length should be sufficient) for connecting the computer to the LMxx Evaluation Board. If it is desired to run the software only, without the LMxx Evaluation board, omit item 2 and proceed to paragraph 2.3. 2.2 Optional Equipment Optional pieces of equipment are as follows: 1. Remote Diode with wired connector to connect to a female 2-pin header, 0.1 in centers 2. Test equipment such as a digital voltmeter or oscilloscope. 2.3 Test Setup - Software First, see the readme.txt file on the SensorEval CD for the latest installation instructions. Follow the installation procedures to load the software on the computer and, if desired, to verify the operation of the LMxx Evaluation Board. The SensorEval icon will be on the desktop window after the software installation. For use with the LMxx Evaluation Board disconnect the USB cable from the board and proceed to the next section for the hardware setup. If it is desired to run the software, without the LMxx Evaluation Board, please proceed to the next section for the hardware setup. 1 Microsoft , Windows , XP are registered trademarks of Microsoft Corporation. 4 5 2.0 Getting Started (continued) 2.4 Test Setup – Hardware Figure 2 below shows an example of a typical LMxx Evaluation Board test setup. J4 Computer USB Port Connection Q1 J3 U3 JP2 LMxx NC 7 TCRIT# 6 NC 5 ALERT# 4 SCL 3 SDA 2 +3.3 1 No jumpers required National Semiconductor LM86 Evaluation Board Rev. 2 LMxx = LM86, LM89, LM89-1, LM90, LM99, or LM99-1 Figure 2. Test Setup using the LMxx Evaluation Board No jumpers are required on header JP2. Hardware Test Setup Procedure 1. The LMxx Evaluation Board comes with jumpers installed on J4, which connects the on-board MMBT3904 diode-connected transistor to the input of the LMxx chip. 2. Connect the USB cable from the computer’s USB port to the LMxx Evaluation Board. 3. Start the SensorEval software. 2.5 Test Setup – System For continuous temperature readings select the read continuous check box. 5 6 3.0 Connection Details Table 1 below describes all the connections and test points of the LMxx evaluation board. Table 1. LMxx Evaluation Board Connections and Test Points Description of the Connections Symbol J3 This is the USB Type B connector to connect to the computer. J4 This allows the user to either: (1) connect jumpers horizontally to the top and bottom pin pairs to connect to the on-board MMBT3904 or (2) to remove the jumpers and connect a remote diode directly to the input of the LMxx. JP2 TCRIT# and ALERT# are the open drain LMxx output pins VDC (+3.3 VDC), and the SMBus Clock and Data signals are available to the user for system monitoring. JP2 NC TCRIT NC ALERT# SCL SDA Connection to On-board Remote Diode Connection to off-the-board Remote Diode +3.3 Jumper MMBT3904 B, C E D+ of LMxx D+ of LMxx J4 J4 D- of LMxx D- of LMxx Jumper Figure 3. Header Connectors on the LMxx Evaluation Board 6 7 4.0 Schematic of the LMxx Evaluation Board + 3.3 VDC C1 0.1uF D+ GND SHELL_1 SHELL_2 2 24 R9 22 3 4 5 6 25 R11 1.5K + 3.3 VDC R12 1M A0 Vcc A1 WP A2 SCL Vss SDA 18 8 7 R13 1.5K R14 1.5K 10 11 12 USBD- SCL 2 5 SDA 3 7 6 XIN PB6/INT6 PB7/T2OUT CTL2/AOUTFLAG CTL0/AINFLAG PC0/RxD0 PC1/TxD0 U2 DISCON# CY7C64603-52NC PA4/FWR# PA5/FRD# CLKOUT C20 0.1uF 6 20 29 30 31 32 33 34 USBD+ SCL SDA C11 C12 2.2uF 0.1uF C13 R2 1.5K 100 pF R15 1.5K TP3 GND U3 XOUT RESET# RESERVED_7 PB0/T2 PB1/T2EX PB2/RXD1 PB3/TXD1 PB4/INT4 PB5/INT5# R7 22 TP2 GND 1M 28 1 R1 0 C10 33pF R4 R3 100k C17 0.1uF C18 0.1uF U4 AT24C02-10SI-2.7 4 C16 2.2uF C6 0.1uF PC2/INT0# PC3/INT1# PC4/T0 PC5/T1 PC6/WR# PC7/RD# LMxx Q1 MMBT3904/SOT J4 HEADER 2x2 2 1 4 3 35 36 37 41 43 44 1 C19 2.2 nF Shunt to select the PCB temperature diode. 45 TCRIT 46 ALERT# 2 3 4 +3.3 VDC VDD SMBCLK D+ SMBDAT D- ALERT# TCRIT# GND 8 SCL 7 SDA 6 ALERT# SCL SDA ALERT# 5 JP2 1 3 2 4 5 TCRIT 6 7 ALERT# 48 49 50 51 HEADER 1X7 TP4 GND WAKEUP# AGnd Gnd1 Gnd2 Gnd3 Gnd4 Gnd5 Gnd6 XCLKSEL XCLK RDY2/AOE RESERVED_1 RESERVED_2 RESERVED_3 RESERVED_4 RESERVED_5 D- C15 0.1uF C5 0.1uF GND 4 8 13 21 26 39 47 52 16 38 42 9 15 17 22 23 VBUS 3 C9 33pF 5 1 14 27 40 19 C14 2.2uF J3 USB-B 2 3 GND 1 uH 1 OUT C4 0.1uF TP1 + 3.3 VDC Y1 12 MHz AVcc Vcc1 Vcc2 Vcc3 Vcc4 RESERVED_6 L1 IN C3 0.1uF + 3.3 VDC U1 LP2950CDT-3.3/TO252 1 C2 0.1uF Use a 0.1 uF capacitor for each Vcc pin of U2 and Reserved_6 pin. SCL SDA Figure 4. LMxx Evaluation Board Schematic 7 8 5.0 LMxx Evaluation Board - Bill of Materials Item Quantity Reference Part ______________________________________________ 1 11 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 33 34 2 3 1 1 1 1 1 1 1 1 5 1 2 2 4 1 1 1 1 1 1 C1,C2,C3,C4,C5,C6,C12, Capacitor, ceramic,0.1uF C15,C17,C18,C20 C9,C10 Capacitor, ceramic,33pF C11,C14,C16 Capacitor, ceramic,2.2uF C13 Capacitor, ceramic,100 pF C19 Capacitor, ceramic,2.2 nF JP2 Header 1x7 J3 Connector, USB-B J4 Header 2x2 L1 Filter, 1uH, Stewart MI1206K900R-00 Q1 Transistor, NPN, MMBT3904 R1 Resistor, SMT,0 Ohm R2,R11,R13,R14,R15 Resistor, SMT,1.5K R3 Resistor, SMT,100k R4,R12 Resistor, SMT,1M R9,R7 Resistor, SMT,22 Ohm TP1,TP2,TP3,TP4 Header 1x1 U1 IC, 3.3 VDC Voltage Regulator, National LP2950CDT-3.3/TO252 U2 IC, microcontroller, Cypress CY7C64603-52NC U3 LMxx Part U4 IC, EEPROM, Atmel AT24C02-10SI-2.7 Y1 Crystal, 12 MHz, Pletronics 2S1200G140 Circuit Board, Fabricated, LM86 Evaluation Board, Rev 2 8 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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