User's Guide SBOU098 – January 2011 SM-USB-DIG Platform This user's guide describes the characteristics, operation, and use of the SM-USB-DIG Platform. It provides a detailed description of the hardware design. The SM-USB-DIG Platform is used as part of several of Texas Instruments evaluation module kits; this document supplements the documentation of those evaluation module kits. 1 2 3 4 Contents Overview ..................................................................................................................... 2 System Setup ................................................................................................................ 3 Theory of Operation ........................................................................................................ 4 Bill of Materials ............................................................................................................. 11 List of Figures 1 2 3 4 5 6 7 8 9 10 11 12 13 .......................................................... Hardware Setup for the SM-USB-DIG Platform......................................................................... SM-USB-DIG Platform Block Diagram ................................................................................... Digital I/O Area—Microcontroller .......................................................................................... Digital I/O Area—I2C and SPI ............................................................................................. Digital I/O Area—CTRL and MEAS....................................................................................... Digital I/O Area—Power Regulator ....................................................................................... USB I/O....................................................................................................................... Firmware EEPROM ......................................................................................................... Power Indicators ............................................................................................................ Reset ......................................................................................................................... DUT Power Switching ...................................................................................................... Main EVM/Cable Connector (H2) ....................................................................................... Typical Hardware Included with the SM-USB-DIG Platform 2 3 4 5 6 6 7 7 8 8 9 9 10 Microsoft, Windows are registered trademarks of Microsoft Corporation. SPI is a trademark of Motorola, Inc. I2C is a trademark of NXP Semiconductors. All other trademarks are the property of their respective owners. SBOU098 – January 2011 Submit Documentation Feedback SM-USB-DIG Platform © 2011, Texas Instruments Incorporated 1 Overview 1 www.ti.com Overview The SM-USB-DIG Platform is a data acquisition system that generates digital and power signals. Specifically, the system generates I2C™, SPI™, and general-purpose digital I/O signals. The system also generates a power-supply connection that has three options: +3.3V, +5V, and Hi-Z (0V). In general, the SM-USB-DIG Platform is connected to an evaluation module test board; these two components, along with the related cables and power supplies, form a complete evaluation module (EVM). This EVM facilitates the evaluation of a specific device. For example, the TMP006EVM is a printed circuit board (PCB) that connects to the SM-USB-DIG Platform that allows customers to evaluate and understand all the features on the TMP006 integrated circuit device. 1.1 Hardware Included with a Typical SM-USB-DIG Platform Figure 1 illustrates the typical hardware included the SM-USB-DIG Platform. Figure 1. Typical Hardware Included with the SM-USB-DIG Platform 2 SM-USB-DIG Platform SBOU098 – January 2011 Submit Documentation Feedback © 2011, Texas Instruments Incorporated System Setup www.ti.com 1.2 If You Need Assistance If you have questions about the INA209 evaluation module, contact the Linear Amplifiers Applications Team at [email protected]. Include SM-USB-DIG Platform as the subject heading. 1.3 FCC Warning This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense is required to take whatever measures may be required to correct this interference. 2 System Setup Figure 2 shows the typical system setup for the SM-USB-DIG Platform. The PC runs software that communicates with the SM-USB-DIG Platform, while the SM-USB-DIG Platform generates the digital signals used to communicate with the test board. Connectors on the test board are occasionally used to connect external signals to the device under test (DUT). Jumpers and other circuitry on the test board allow for different configurations of the DUT. Figure 2. Hardware Setup for the SM-USB-DIG Platform Minimum PC operating requirements: • Microsoft® Windows® XP or higher • Available USB port NOTE: Works with either US or European regional settings. SBOU098 – January 2011 Submit Documentation Feedback SM-USB-DIG Platform © 2011, Texas Instruments Incorporated 3 Theory of Operation 3 www.ti.com Theory of Operation The SM-USB-DIG Platform is a general-purpose data acquisition system that is part of several different Texas Instruments EVMs. Figure 3 illustrates a block diagram of the platform. The core of the SM-USB-DIG Platform is the TUSB3210, an 8052 microcontroller (mC) that has a built-in USB interface. The microcontroller receives information from the host computer that it translates into I2C, SPI, or other digital I/O patterns. During the digital I/O transaction, the microcontroller reads the response of any device connected to the I/O interface. The response from the device is then sent back to the PC where it is interpreted by the host computer. +3.3V VUSB +5V TUSB3210 8052 mC with USB Interface and UART USB Bus from Computer 8Kx8-byte EEPROM Power-On Reset +5.0V USB Power +3.0V 2 I C/SPI Control and Measure Bits Buffers and Level Translators To Test Board To Computer and Power Supplies +3.3V Regulator SM USB DIG Platform Power Switching VDUT (H-Z, 3.3V, or 5V) Switched Power Figure 3. SM-USB-DIG Platform Block Diagram 4 SM-USB-DIG Platform SBOU098 – January 2011 Submit Documentation Feedback © 2011, Texas Instruments Incorporated Theory of Operation www.ti.com 3.1 Digital I/O Area The following subsections discuss the digital I/O areas that surround the microcontroller. Refer to SBOR012 (available for download from www.ti.com) for a detailed copy of the entire schematic. 3.1.1 Microcontroller Figure 4 shows the detailed area surrounding the microcontroller. U2 is a TUSB3210 microcontroller—an 8052 core with a built-in USB interface. U2 converts information from the USB bus on the PC to I2C, SPI, and One-Wire digital transactions. U2 runs on 3.3V; the inputs are not 5V tolerant. As a result, all external input signals are level-translated. Figure 4. Digital I/O Area—Microcontroller SBOU098 – January 2011 Submit Documentation Feedback SM-USB-DIG Platform © 2011, Texas Instruments Incorporated 5 Theory of Operation 3.1.2 www.ti.com I2C and SPI Figure 5 shows the digital I/O area that manages I2C and SPI communications. U3 and U4 are open collector drivers. These devices drive the I2C and SPI output signals. Note that the input is 3.3V and the output follows VDUT (that is, 3V or 5V). Figure 5. Digital I/O Area—I2C and SPI 3.1.3 CTRL and MEAS Figure 6 shows the digital I/O area around the microcontroller. U5 and U9 are the bi-directional level-translators for the general-purpose output/input signals, CTRL/MEAS4 and CTRL/MEAS5. The CTRL signals are outputs, while the MEAS signals are inputs. The direction and function of the signals depends on the DIR1 and DIR2 signals from the microcontroller that control U5 and U9, respectively. Figure 6. Digital I/O Area—CTRL and MEAS 6 SM-USB-DIG Platform SBOU098 – January 2011 Submit Documentation Feedback © 2011, Texas Instruments Incorporated Theory of Operation www.ti.com 3.1.4 Power Regulator Figure 7 shows the power regulator that supplies +3.3V to the microcontroller, digital circuitry, and VDUT supply. U1 converts a +5V input to the +3.3V output. The +5V input is provided via the USB port. Figure 7. Digital I/O Area—Power Regulator 3.2 USB I/O Figure 8 shows the USB I/O area. H1 connects the USB bus to the TUSB3210 microcontroller. The transistor and resistors are standard support circuitry for this device. See the TUSB3210 data sheet (SLLS466F), available from www.ti.com, for more information. Figure 8. USB I/O SBOU098 – January 2011 Submit Documentation Feedback SM-USB-DIG Platform © 2011, Texas Instruments Incorporated 7 Theory of Operation 3.3 www.ti.com Firmware EEPROM Figure 9 shows the firmware EEPROM area. U6 is the 64K-byte EEPROM that contains the firmware program used to run the microcontroller. Figure 9. Firmware EEPROM 3.4 Power Indicators Figure 10 shows the LED power indicators. The LEDs are used to indicate the power status of the unit. The LED (D3) labeled 3.3V should be on when the system is powered up. VDUT is switched power, and can be turned ON and OFF with software. Figure 10. Power Indicators 8 SM-USB-DIG Platform SBOU098 – January 2011 Submit Documentation Feedback © 2011, Texas Instruments Incorporated Theory of Operation www.ti.com 3.5 Reset Figure 11 shows the microcontroller reset circuitry. The reset circuit is connected to the RST pin on the microcontroller and resets the microcontroller upon power-up. U10 is a Schmitt buffer that is used to create a clean logic high or low (that is, the RST pin is connected to 3.3V or 0V, and not to intermediate voltage levels). Figure 11. Reset 3.6 DUT Power Switching Figure 12 shows the DUT power switching. U8 is an auto-switching power mux from Texas Instruments. It uses digital inputs as control lines to a Mux that can switch between two different voltages. On the SM-USB-DIG, the Power MUX switches between the +5V USB supply and the +3.3V power regulator output. Software can be used to set the VDUT output to +3.3V, +5V, or a Hi-Z state(disconnected). Figure 12. DUT Power Switching SBOU098 – January 2011 Submit Documentation Feedback SM-USB-DIG Platform © 2011, Texas Instruments Incorporated 9 Theory of Operation 3.7 www.ti.com Main EVM/Cable Connector Definition on SM-USB-DIG Platform There is one primary connector, H2, on the SM-USB-DIG that is used to connect the unit directly to an EVM or to connect to a cable that connects to an EVM. Figure 13 shows the H2 connector. Figure 13. Main EVM/Cable Connector (H2) 3.7.1 H2 Signal Definition Table 1 lists the different signals connected to H2 on the SM-USB-DIG Platform and gives a description of each signal. Table 1. H2 Signal Definition (10-Pin, 50-mil Connector) (1) 10 Pin on J1 Signal 1 I2C_SCL 2 CTRL/MEAS4 3 I2C_SDA1 4 CTRL/MEAS5 5 SPI_DOUT1 6 VDUT 7 SPI_CLK Description I2C clock signal (SCL) GPIO: Control Output or Measure Input I2C data signal (SDA) GPIO: Control Output or Measure Input SPI data output (MOSI) Switchable DUT Power Supply: +3.3V, +5V, or Hi-Z (disconnected). (1) SPI clock signal (SCLK) 8 GND 9 SPI_CS1 Power return (GND) SPI chip select signal (CS) 10 SPI_DIN1 SPI data input (MISO) When VDUT is Hi-Z, all digital I/O are Hi-Z as well. SM-USB-DIG Platform SBOU098 – January 2011 Submit Documentation Feedback © 2011, Texas Instruments Incorporated Bill of Materials www.ti.com 4 Bill of Materials Table 2 shows the parts list. Table 2. Bill of Materials Item Qty Ref Des 1 1 N/A 2 15 C1, C3, C5, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C21, C24 3 2 4 Value Description Manufacturer Part No Printed circuit board Texas Instruments 6522630 0.1mF Capacitor, ceramic 0.1mF 16V X7R 0402 Murata GRM155R71C104KA88D C20, C23 1mF Capacitor, ceramic 1.0mF 16V X5R 0402 TDK C1005X5R1C105K 2 C2, C4 10mF Capacitor, tantalum 10mF 10V 20% SMD AVX TAJP106M010RNJ 5 2 C6, C7 10000pF Capacitor, ceramic 10000pF 500V X7R 0805 Johanson Dielectrics 501R15W103KV4E 6 2 C8, C9 33pF Capacitor, ceramic 33PF 50V C0G 0402 Murata GRM1555C1H330JZ01D 7 1 C22 10mF Capacitor, tantalum 10mF 10V 20% SMD Rohm TCM1A106M8R 8 1 D1 TVS ESD ASD 181W 6.0V SOD-523 ON Semiconductor ESD5Z6.0T1G 9 1 D2 Diode Schottky 40V 250MA SOD523 ON Semiconductor NSR0340V2T1G 10 2 D3, D4 LED Green SS TYPE LOW CUR SMD Panasonic -SSG LNJ308G8LRA 11 1 F1 Ferrite 300mA 600Ω 0603 SMD Laird Signal Integrity HZ0603C601R-10 12 1 Q1 Trans GP SS NPN 40V ON Semiconductor SOT323 MMBT2222AWT1G 13 2 R1, R11 33R Resistor, 33Ω 1/16W 5% 0402 SMD Rohm MCR01MZPJ330 14 1 R2 15kΩ Resistor, 15.0kΩ 1/16W 1% 0402 SMD Rohm MCR01MZPF1502 15 2 R3, R13 100kΩ Resistor, 100kΩ 1/16W Rohm 1% 0402 SMD MCR01MZPF1003 16 1 R4 1.5kΩ Resistor, 1.50kΩ 1/16W 1% 0402 SMD Rohm MCR01MZPF1501 17 2 R5, R6 10kΩ Resistor, 10.0kΩ 1/16W 1% 0402 SMD Rohm MCR01MZPF1002 18 1 R7 47kΩ Resistor, Array 47KΩ 8TERM 4RES SMD Rohm MNR14E0APJ473 19 4 R8, R9, R14, R15 47kΩ Resistor, 47kΩ 1/16W 5% 0402 SMD Rohm MCR01MZPJ473 20 2 R10, R12 1MΩ Resistor, 1.0MΩ 1/16W Rohm 5% 0402 SMD MCR01MZPJ105 21 2 R16, R20 49.9kΩ Resistor, 49.9kΩ 1/10W 1% 0603 SMD Rohm MCR03EZPFX4992 22 2 R17, R18 1.2kΩ Resistor, 1.20kΩ 1/16W 1% 0402 SMD Rohm MCR01MZPF1201 23 1 R19 698Ω Resistor, 698Ω 1/10W 1% 0402 SMD Panasonic - ECG ERJ-2RKF6980X 24 1 R21 220kΩ Resistor, 220kΩ 1/16W Rohm 1% 0402 SMD MCR01MZPF2203 25 2 R22, R23 510Ω Resistor, 510Ω 1/16W 1% 0402 SMD MCR01MZPF5100 Rohm SBOU098 – January 2011 Submit Documentation Feedback SM-USB-DIG Platform © 2011, Texas Instruments Incorporated 11 Bill of Materials www.ti.com Table 2. Bill of Materials (continued) Item (1) 12 Qty Ref Des Value 1kΩ Description Manufacturer Part No Resistor, 1kΩ 1/8W 1% Stackpole 0603 SMD RNCP0603FTD1K00 26 1 R24 27 1 U1 IC 3.3V 150mA LDO REG SOT-23-5 Texas Instruments TPS76333DBVR 28 1 U2 IC USB Controller storage 64-LQFP Texas Instruments TUSB3210PM 29 1 U3 IC Buff/Dvr Hex NON-INV 14VQFN Texas Instruments SN74LVC07ARGYR 30 1 U4 IC Buff/Dvr DL NON-INV SC706 Texas Instruments SN74LVC2G07DCKR 31 2 U5, U9 IC Bus Transcvr TRI-ST SOT6 Texas Instruments SN74LVC1T45DRLR 32 1 U6 IC EEPROM 64KBit 400kHz SOT23-5 MicroChip 24LC64T-I/OT 33 1 U7 IC Positive-OR Gate 2-IN SC-70 Texas Instruments SN74LVC1G32DCKR 34 1 U8 IC Autoswitching Pwr Mux 8-SON Texas Instruments TPS2115ADRBR 35 1 U10 IC Buffer Schmitt Trig SOT5 Texas Instruments SN74LVC1G17DRLR 36 1 XTL1 Crystal 12.000 MHz 18PF SMD TXC CORPORATION 7M-12.000MAAJ-T 37 1 H1 Conn Plug USB 4POS RT ANG SMD Molex 480371000 38 1 H2 Conn Header Rt Ang 10POS .050 (1) Mill-Max 850-10-010-20-001000 Alternatively, cut down 850-10-050-20-001000 to 10-position size. 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