User's Guide SBAU122 - March 2006 ADS7845EVM and ADS7845EVM-PDK This user's guide describes the characteristics, operation, and use of the ADS7845EVM, both by itself and as part of the ADS7845EVM-PDK. This device is a 5-wire touch screen controller evaluation module (EVM) which also has an auxiliary input measurement capability. A complete circuit description, schematic diagram, and bill of materials are included. The following related documents are available through the Texas Instruments web site at www.ti.com. EVM-Compatible Device Data Sheets 1 2 3 4 5 6 7 Device Literature Number ADS7845 SBAS104 REF3125 SBVS046 TAS1020B SLES025 REG1117-5 SBVS001 TPS767D318 SLVS209 SN74LVC125A SCAS290 SN74LVC1G125 SCES223 SN74LVC1G07 SCES296 Contents EVM Overview ............................................................................................................... 2 Analog Interface.............................................................................................................. 2 Digital Interface .............................................................................................................. 3 Power Supplies .............................................................................................................. 3 EVM Operation ............................................................................................................... 5 Kit Operation ................................................................................................................. 5 EVM Bill of Materials and Schematic .................................................................................... 10 List of Figures 1 2 ADS7845EVM-PDK Block Diagram ...................................................................................... 6 Default Software Screen ................................................................................................... 8 List of Tables 1 2 3 4 5 6 Analog Interface Pinout ..................................................................................................... 2 Digital Interface Pinout ...................................................................................................... 3 Power Supply Pinout ........................................................................................................ 3 List of Jumpers ............................................................................................................... 5 ADS7845EVM Bill of Materials ........................................................................................... 10 USB-MODEVM Bill of Materials .......................................................................................... 11 SBAU122 - March 2006 Submit Documentation Feedback ADS7845EVM and ADS7845EVM-PDK 1 www.ti.com EVM Overview 1 EVM Overview 1.1 Features * * Full-featured evaluation board for the ADS7845 5-wire, resistive touch screen controller (TSC) Modular design for use with a variety of DSP and microcontroller interface boards The ADS7845EVM-PDK is a complete evaluation kit, which includes a USB-based motherboard and evaluation software for use with a personal computer running Microsoft WindowsTM operating systems (Windows 2000 or higher). 1.2 Introduction The ADS7845EVM is in Texas Instruments' modular EVM form factor, which allows direct evaluation of the ADS7845 performance and operating characteristics, and eases software development and system prototyping. This EVM is compatible with the 5-6K Interface Board (SLAU104) and the HPA-MCU Interface Board (SLAU106) from Texas Instruments and additional third-party boards such as the HPA449 demonstration board from SoftBaugh, Inc. (www.softbaugh.com). The ADS7845EVM-PDK is a complete evaluation/demonstration kit, which includes a USB-based motherboard called the USB-MODEVM Interface Board and evaluation software for use with a personal computer running Microsoft Windows operating systems. 2 Analog Interface For maximum flexibility, the ADS7845EVM is designed for easy interfacing to multiple analog sources. Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket combination at J1. This header/socket provides access to the analog input pins of the TSC. Consult Samtec at www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector options. Table 1. Analog Interface Pinout Pin Number Signal Description J1.2 UL Touch screen Upper Left (UL) electrode J1.4 LL Touch screen Lower Left (LL) electrode J1.6 UR Touch screen Upper Right (UR) electrode J1.8 LR Touch screen Lower Right (LR) electrode J1.10 WIPER Touch screen Wiper electrode J1.12 AUXIN Auxiliary input, 0V to VREF J1.14 Unused J1.16 Unused J1.18 REF(-) Tied to analog ground J1.20 REF(+) External reference source input (2.5V NOM) J1.15 Unused J1.11-J1.19 (odd) AGND Analog ground connections (except J1.15) Microsoft Windows is a trademark of Microsoft Corporation. SPI is a trademark of Motorola, Inc. NI-VISA is a trademark of National Instruments. I2C, I2S are trademarks of Royal Philips Electronics B.V., The Netherlands. WinZip is a trademark of WinZip Computing, Inc.. All trademarks are the property of their respective owners. 2 ADS7845EVM and ADS7845EVM-PDK SBAU122 - March 2006 Submit Documentation Feedback www.ti.com Digital Interface 3 Digital Interface The ADS7845EVM is designed to easily interface with multiple control platforms. Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket combination at J2. This header/socket provides access to the digital control and serial data pins of the TSC. Consult Samtec at www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector options. Table 2. Digital Interface Pinout 4 Pin Number Signal J2.1 Unused Description J2.2 BUSY TSC busy flag J2.3 SCLK Serial clock J2.4 DGND Digital ground J2.5 SCLKR Serial clock return (for DSP host systems) J2.6 Unused J2.7 SS J2.8 Unused J2.9 FSR Frame sync return (for DSP host systems) J2.10 DGND Digital ground J2.11 MOSI Serial data input to TSC from host J2.12 Unused J2.13 MISO J2.14 Unused J2.15 PENIRQ Pen interrupt output from TSC J2.16 SCL I2C bus serial clock J2.17 Unused J2.18 DGND J2.19 Unused J2.20 SDA Slave select - Active low signal, enables data transfer. Frame sync on DSP host systems. Serial data output from TSC to host Digital ground I2C bus data line Power Supplies J3 provides connection to the common power bus for the ADS7845EVM. Power is supplied on the pins listed in Table 3. Table 3. Power Supply Pinout Signal Pin Number Signal Unused 1 2 Unused +5VA 3 4 Unused DGND 5 6 AGND Unused 7 8 +VD1 +3.3VD 9 10 Unused When power is supplied to J3, JMP4 allows for one of three different DC voltages to be used as the power supply of the ADS7845. See the schematic and printed circuit board silkscreen for details. The ADS7845EVM-PDK motherboard (the USB-MODEVM Interface Board) supplies power to J3 of the ADS7845EVM. Power for the motherboard is supplied either through its USB connection or on terminal blocks on the board. SBAU122 - March 2006 Submit Documentation Feedback ADS7845EVM and ADS7845EVM-PDK 3 www.ti.com Power Supplies 4.1 TSC Power Power for the ADS7845 VCC can be supplied either from +5V or from +3.3V. JMP4 selects which of these voltages is routed to the ADS7845. When JMP4 is in the default factory condition (shunt on pins 5-6), power to the TSC comes from J3.3 (+5VA). When the shunt is installed on JMP4 pins 3-4, power comes from J3.9 (+3.3VD). A third supply option is to place a shunt on JMP4 pins 1-2, and supply a voltage from J3.8 (VD1), which must be within the specified operating range of the ADS7845. 4.2 Stand-Alone Operation When used as a stand-alone EVM, the analog power can be applied to TP1, referenced to TP2. CAUTION Verify that all power supplies are within the safe operating limits shown on the ADS7845 data sheet before applying power to the EVM. 4.3 USB-MODEVM Interface Power The USB-MODEVM Interface Board can be powered from several different sources: * USB * 6VDC-10VDC AC/DC wall supply (not included) * Laboratory power supply When powered from the USB connection, JMP6 should have a shunt from pins 1-2 (this is the default factory configuration). When powered from 6V-10VDC, either through the J8 terminal block or J9 barrel jack, JMP6 should have a shunt installed on pins 2-3. If power is applied in any of these ways, onboard regulators generate the required supply voltages and no further power supplies are necessary. If laboratory supplies are used to provide the individual voltages required by the USB-MODEVM Interface Board, JMP6 should have no shunt installed. Voltages are then applied to J2 (+5VA), J3 (+5VD), J4 (+1.8VD), and J5 (+3.3VD). The +1.8VD and +3.3VD can also be generated on the board by the onboard regulators from the +5VD supply; to enable this option, the SW1 switches need to be set in the ON position (lower position, looking at the board with text reading right-side up) to enable the regulators. If +1.8VD and +3.3VD are supplied externally, disable the onboard regulators by placing the SW1 switches in the OFF position. Each power-supply voltage has an LED (D1-D7) that lights when the power supplies are active. 4.4 Reference Voltage The ADS7845 requires a voltage reference. An external reference may be supplied through J1 pin 20 on the ADS7845EVM, referenced to analog ground (J1 pin 18 on the ADS7845EVM). JMP1 must be installed across positions 5-6 in order to route this external reference voltage to the ADS7845. CAUTION Verify that the external reference voltage is within the safe operating limits shown on the ADS7845 data sheet before applying power to the EVM. A 2.5V reference is supplied on the ADS7845EVM, and can be selected for use by connecting JMP1 pins 3-4. Alternatively, the supply voltage can be used as the voltage reference by connecting pins 1-2 on JMP1. 4 ADS7845EVM and ADS7845EVM-PDK SBAU122 - March 2006 Submit Documentation Feedback www.ti.com EVM Operation 5 EVM Operation The following section provides information on the analog input, digital control, and general operating conditions of the ADS7845EVM. 5.1 Analog Input The analog input sources (touch screen and auxiliary input) can be applied directly to J1 (top side or bottom side) or through signal-conditioning modules available for the modular EVM system. 5.2 Digital Control The digital control signals can be applied directly to J2 (top side or bottom side). The modular ADS7845EVM can also be connected directly to a DSP or microcontroller interface board, such as the HPA449, or to the USB-MODEVM Interface Board if purchased as part of the ADS7845EVM-PDK. For a current list of compatible interface and/or accessory boards for the EVM or the ADS7845, see the relevant product folder on the TI web site. 5.3 Default Jumper Locations Table 4 provides a list of jumpers found on the EVM and the factory default conditions for each one. Table 4. List of Jumpers 6 Jumper Shunt Position Jumper Description JMP1 3-4 Selects reference voltage source to ADS7845. 1-2 selects VCC, 3-4 selects the onboard 2.5V reference, and 5-6 selects the external reference voltage from J1.20. JMP2 CLOSED Connects analog ground (AGND) to digital ground (DGND).Default is connected. JMP3 CLOSED EEPROM Address Select - when installed and used with the USB-MODEVM, firmware for the motherboard is executed from the EEPROM on board the ADS7845EVM. This is the default mode. JMP4 5-6 Analog Power Select (default is +5VA) Kit Operation The following section provides information on using the ADS7845EVM-PDK, including setup, program installation, and program usage. 6.1 ADS7845EVM-PDK Block Diagram A block diagram of the ADS7845EVM-PDK is shown in Figure 1. The evaluation kit consists of two circuit boards connected together. The motherboard is designated as the USB-MODEVM Interface Board, while the daughtercard is the ADS7845EVM described previously in this manual. SBAU122 - March 2006 Submit Documentation Feedback ADS7845EVM and ADS7845EVM-PDK 5 www.ti.com Kit Operation ADS7845EVM X+ MOSI XY+ MISO SCLK SS ADS7845 Y- PENIRQ VBAT AUX EVM Position 1 Control Interface 2 SPI, I C TAS1020B USB 8051 Microcontroller EVM Position 2 USB 2 I S, AC97 Audio Interface Figure 1. ADS7845EVM-PDK Block Diagram The USB-MODEVM Interface Board is intended to be used in USB mode, where control of the installed EVM is accomplished using the onboard USB controller device. Provision is made, however, for driving all the data buses (I2CTM, SPITM, I2STM/AC97) externally. The source of these signals is controlled by SW2 on the USB-MODEVM. 6 ADS7845EVM and ADS7845EVM-PDK SBAU122 - March 2006 Submit Documentation Feedback www.ti.com Kit Operation 6.2 Quick Start Ensure that the ADS7845EVM is installed on the USB-MODEVM Interface Board. The ADS7845EVM should be installed in the topmost position, using J11, J12, and J13 on the USB-MODEVM. Place the CD-ROM into your PC CD-ROM drive. Locate the Setup program on the disk and execute it. The Setup program installs the ADS7845 evaluation software on your PC. Follow the instructions and prompts given. After the main program is installed, a dialog box appears with instructions for installing NI-VISA 3.2 Runtime, a self-extracting archive. Click OK to proceed. A WinZipTM dialog appears. Click Unzip, and the archive extracts itself and automatically runs the NI-VISATM 3.2 Runtime installer. Follow the instructions in the NI-VISA 3.1 Runtime Installer. When prompted for which features to install, do the following: 1. Click on the disk icon next to NI-VISA 3.2 2. Select, Do not install this feature. 3. Click on the disk icon next to USB. 4. Select the option which installs this feature. 5. Click Next. Accept the license agreement, and continue the installation. When the installation completes, click Finish on the ADS7845EVM installer window. You may be prompted to restart your computer. When installation is complete, attach a USB cable from your PC to the USB-MODEVM Interface Board. As configured at the factory, the board will be powered from the USB interface, so the power indicator LEDs on the USB-MODEVM should light. Once this occurs, launch the ADS7845 evaluation software on your PC. SBAU122 - March 2006 Submit Documentation Feedback ADS7845EVM and ADS7845EVM-PDK 7 www.ti.com Kit Operation The software should automatically find the ADS7845EVM, and a screen similar to the one in Figure 2 should appear. Figure 2. Default Software Screen In order to use the touch screen features, a 5-wire, resistive touch screen must be connected to J1 of the ADS7845EVM, as described previously. 6.3 USB-MODEVM Interface Board The simple diagram shown in Section 6.1 shows only the basic features of the USB-MODEVM Interface Board. The board is designed for a TAS1020B streaming audio USB controller with an 8051-based core. It features two positions for modular EVMs, or one double-wide serial modular EVM may be installed. For use with the ADS7845, the ADS7845EVM is installed in the topmost EVM slot, which connects the ADS7845 digital control interface to the SPI port, realized using the TAS1020B. Because the ADS7845 has no audio features, the lower EVM slot (which is connected to the TAS1020B digital audio interface) is not used. 8 ADS7845EVM and ADS7845EVM-PDK SBAU122 - March 2006 Submit Documentation Feedback www.ti.com Kit Operation As configured from the factory, the board is ready to use with the ADS7845EVM. However, if external SPI control is desired, the signals may be applied to J15, as long as the SW2 is set so that USB SPI control is disabled. To view all the functions and configuration options available on this board, see the USB-MODEVM Interface Board schematic in Section 7.2. 6.4 Program Description After the ADS7845EVM-PDK software installation (described in Section 6.2), evaluation and development with the ADS7845 can begin. 6.4.1 Touch Screen Functions Panel The touch screen box in this panel is updated when a touch is detected on the touch screen. As the touch screen is drawn on, the motion on the touch screen is translated into pixels on this box. The software takes X and Y readings which are shown to the right of the touch screen box. The display can be cleared by pressing the Clear Graph button on the screen. 6.4.2 Data Acquisition Functions Panel The ADS7845 provides for measuring an auxiliary input voltage. A data acquisition functions panel displays the measured value for this parameter. Measurements are updated only when the touch screen is not being pressed. Note that these measurements depend on the reference voltage and are affected by the setting of the power-down bits. The software presumes that the reference voltage is 2.5V. 6.4.3 Configuration Panel The ADS7845 can be configured to operate in either 8-bit or 12-bit resolution mode. This panel controls the mode selection. Touch screen measurements may be made in either single-ended or differential mode; see the ADS7845 data sheet for a discussion of these modes. The touch screen measurement mode may also be selected in this panel. If single-ended mode is used, ensure that a reference voltage is supplied; however, single-ended measurements are discouraged for touch screen use, because differential mode yields far more accurate results. The two power-down bits of the ADS7845 can also be set from this panel. A brief description of the mode selected is shown on the screen when setting these bits; see Table V of the ADS7845 data sheet for details on the functions of these bits. 6.4.4 Datalogging The software can record the data it is taking from the ADS7845 to a tab-delimited file, suitable for importing into spreadsheets. To do this, first go into the File menu, and select Log Data to File..., which opens a file-select window and allows you to specify a file to which to write the data. At the same time, this feature enables the Datalogging menu. When ready to begin recording data to a file, select Datalogging Start Logging. Data is written to the file until Datalogging Stop Logging is selected. When the screen is not touched, the AUX values are written to the file, and the X and Y parameters are written to the file with values of 9999, to indicate that they are not updated. When the screen is touched, the X and Y parameters are written while the AUX values are written to the file as 9999. Because the program constantly updates at a rate of about 400 readings per second, datalog files can quickly grow large; therefore, log only what is necessary. The format of the data file has the first column as the time in milliseconds (just a timer in the program, which can arbitrarily start at any number), then X, Y, and AUX columns. Every new reading is a new row in the file. SBAU122 - March 2006 Submit Documentation Feedback ADS7845EVM and ADS7845EVM-PDK 9 www.ti.com EVM Bill of Materials and Schematic 7 EVM Bill of Materials and Schematic The following tables contain a complete bill of materials for the modular ADS7845EVM and the USB-MODEVM Interface Board (included only in the ADS7845EVM-PDK). Table 5. ADS7845EVM Bill of Materials 10 Designators Description Manufacturer Mfg. Part Number R1, R2, R3, R4, R5 0 1/8W 5% Chip Resistor Panasonic ERJ-6GEY0R00V R7, R8 33 1/8W 5% Chip Resistor Panasonic ERJ-6GEYJ330V R6 100 1/8W 5% Chip Resistor Panasonic ERJ-6GEYJ101V R9, R10, R11 2.7K 1/8W 5% Chip Resistor Panasonic ERJ-6GEYJ272V R12 10K 1/8W 5% Chip Resistor Panasonic ERJ-6GEYJ103V C8 0.47F 10V Ceramic Chip Capacitor, 10%, X5R TDK C1608X5R1A474KT C10, C11 1F 25V Ceramic Chip Capacitor, TDK 10%, X5R C2012X5R1E105KT C7, C9 10F 16V Ceramic Chip Capacitor, 20%, X5R TDK C3216X5R1C106MT C1, C2, C3, C4, C5, C6 Chip Capacitor - Not Installed U1 Touch Screen Controller, 5-Wire Resistive Texas Instruments ADS7845E U3 2.5V Precision Voltage Reference Texas Instruments I2C EEPROM REF3125AIDBZ U2 64K MicroChip 24LC64-I/SN J1A, J2A 20-pin SMT Plug Samtec TSM-110-01-L-DV-P J1B, J2B 20-pin SMT Socket Samtec SSW-110-22-F-D-VS-K J3A 10-pin SMT Plug Samtec TSM-105-01-L-DV-P J3B 10 -pin SMT Socket Samtec SSW-105-22-F-D-VS-K ADS7845EVM PWB (must be RoHS compliant) Texas Instruments 6478716 JMP2, JMP3 2 Position Jumper, 0.1" spacing Samtec TSW-102-07-L-S JMP1, JMP4 2 X 3 Position Header, 0.1" spacing Samtec TSW-103-07-L-D L1, L2 100H Surface Mount Inductor, Shielded API Delevan S1210R-104K TP1 Miniature Test Point Terminal Keystone Electronics 5000 TP2, TP3 Multipurpose Test Point Terminal Keystone Electronics 5011 N/A Header Shorting Block Samtec SNT-100-BK-T ADS7845EVM and ADS7845EVM-PDK SBAU122 - March 2006 Submit Documentation Feedback www.ti.com EVM Bill of Materials and Schematic Table 6. USB-MODEVM Bill of Materials Designators Description Manufacturer Mfg. Part Number R4 10 1/10W 5% Chip Resistor Panasonic ERJ-3GEYJ100V R10, R11 27.4 1/16W 1% Chip Resistor Panasonic ERJ-3EKF27R4V R20 75 1/4W 1% Chip Resistor Panasonic ERJ-14NF75R0U R19 220 1/10W 5% Chip Resistor Panasonic ERJ-3GEYJ221V R14, R21, R22 390 1/10W 5% Chip Resistor Panasonic ERJ-3GEYJ391V R13 649 1/16W 1% Chip Resistor Panasonic ERJ-3EKF6490V R9 1.5k 1/10W 5% Chip Resistor Panasonic ERJ-3GEYJ152V R1, R2, R3, R5, R6, R7, 2.7k 1/10W 5% R8 Chip Resistor Panasonic ERJ-3GEYJ272V R12 3.09k 1/16W 1% Chip Resistor Panasonic ERJ-3EKF3091V R15, R16 10k 1/10W 5% Chip Resistor Panasonic ERJ-3GEYJ103V R17, R18 100k 1/10W 5% Chip Resistor Panasonic ERJ-3GEYJ104V RA1 10k 1/8W Octal Isolated Resistor Array CTS Corporation 742C163103JTR C18, C19 33pF 50V Ceramic Chip Capacitor, 5%, NPO TDK C1608C0G1H330J C13, C14 47pF 50V Ceramic Chip Capacitor, 5%, NPO TDK C1608C0G1H470J C20 100pF 50V Ceramic Chip Capacitor, 5%, NPO TDK C1608C0G1H101J C21 1000pF 50V Ceramic Chip Capacitor, 5%, NPO TDK C1608C0G1H102J C15 0.1F 16V Ceramic Chip Capacitor, 10%,X7R TDK C1608X7R1C104K C16, C17 0.33F 16V Ceramic Chip Capacitor, +/-20%,Y5V TDK C1608X5R1C334K C9, C10, C11, C12, C22, C23, C24, C25, C26, C27, C28 1F 6.3V Ceramic Chip Capacitor, 10%, X5R TDK C1608X5R0J105K C1, C2, C3, C4, C5, C6, 10F 6.3V Ceramic C7, C8 Chip Capacitor, 10%, X5R TDK C3216X5R0J106K D1 50V, 1A, Diode MELF SMD Micro Commercial Components DL4001 D2 Yellow Light Emitting Diode Lumex SML-LX0603YW-TR D3, D4, D6, D7 Green Light Emitting Diode Lumex SML-LX0603GW-TR D5 Red Light Emitting Diode Lumex SML-LX0603IW-TR Q1, Q2 N-Channel MOSFET Zetex ZXMN6A07F X1 6MHz Crystal SMD Epson MA-505 6.000M-C0 U8 USB Streaming Controller Texas Instruments TAS1020BPFB U2 5V LDO Regulator Texas Instruments REG1117-5 U9 3.3V/1.8V Dual Output LDO Regulator Texas Instruments TPS767D318PWP U3, U4 Quad, Tri-State Buffers Texas Instruments SN74LVC125APW U5, U6, U7 Single IC Buffer Driver with Open Drain o/p Texas Instruments SN74LVC1G07DBVR U10 Single Tri-State Buffer Texas Instruments SN74LVC1G125DBVR Microchip 24LC64I/SN Texas Instruments 6463995 U1 64K 2-Wire Serial EEPROM USB-MODEVM PCB SBAU122 - March 2006 Submit Documentation Feedback I2C ADS7845EVM and ADS7845EVM-PDK 11 www.ti.com EVM Bill of Materials and Schematic Table 6. USB-MODEVM Bill of Materials (continued) 7.1 Designators Description Manufacturer Mfg. Part Number TP1, TP2, TP3, TP4, TP5, TP6, TP9, TP10, TP11 Miniature test point terminal Keystone Electronics 5000 TP7, TP8 Multipurpose test point terminal Keystone Electronics 5011 J7 USB Type B Slave Connector Thru-Hole Mill-Max 897-30-004-90-000000 J1, J2, J3, J4, J5, J8 2-position terminal block On Shore Technology ED555/2DS J9 2.5mm power connector CUI Stack PJ-102B J10 BNC connector, female, PC mount AMP/Tyco 414305-1 J11A, J12A, J21A, J22A 20-pin SMT plug Samtec TSM-110-01-L-DV-P J11B, J12B, J21B, J22B 20-pin SMT socket Samtec SSW-110-22-F-D-VS-K J13A, J23A 10-pin SMT plug Samtec TSM-105-01-L-DV-P J13B, J23B 10-pin SMT socket Samtec SSW-105-22-F-D-VS-K J6 4-pin double row header (2x2) 0.1" Samtec TSW-102-07-L-D J14, J15 12-pin double row header (2x6) 0.1" Samtec TSW-106-07-L-D JMP1-JMP4 2-position jumper, 0.1" spacing Samtec TSW-102-07-L-S JMP8-JMP14 2-position jumper, 0.1" spacing Samtec TSW-102-07-L-S JMP5, JMP6 3-position jumper, 0.1" spacing Samtec TSW-103-07-L-S JMP7 3-position dual row jumper, 0.1" spacing Samtec TSW-103-07-L-D SW1 SMT, half-pitch 2-position switch C&K Division, ITT TDA02H0SK1 SW2 SMT, half-pitch 8-position switch C&K Division, ITT TDA08H0SK1 Jumper plug Samtec SNT-100-BK-T ADS7845EVM Schematic The schematic diagram is provided as a reference. 7.2 USB-MODEVM Schematic The schematic diagram is provided as a reference. 12 ADS7845EVM and ADS7845EVM-PDK SBAU122 - March 2006 Submit Documentation Feedback 1 2 3 4 5 6 REVISION HISTORY REV ENGINEERING CHANGE NUMBER APPROVED D D J2A (TOP) = SAM_TSM-110-01-L-DV-P J2B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K J1 0 ohm J2 C11 +VCC 1uF 1 10 U1 2 3 4 5 0 ohm R5 0 ohm 7 8 R6 100 ohm 9 C1 NI C2 NI C3 NI C4 NI C5 NI C6 NI 16 15 14 13 12 11 DCLK CS DIN BUSY DOUT PENIRQ WIPER AUXIN VREF SCLK SS MOSI MISO PENIRQ R12 8 R9 2.7K C10 1uF 6 4 VCC JMP2 VSS 1 2 24LC64I/SN TP3 1 2 3 2 4 6 JPR-2X1 2 VREF INPUT C9 10uF JMP3 U3 IN OUT GND C8 0.47uF 2 1 1 3 B U2 +VCC JMP1 1 3 EXT VREF 5 +VCC C +VCC ADS7845E +VCC R11 2.7K DAUGHTER-SERIAL 10K GND J1A (TOP) = SAM_TSM-110-01-L-DV-P J1B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K UL UR LL LR R10 2.7K 7 C 33 6 R4 HEADER-10X2 R8 +VCC SCL 0 ohm 33 2 4 6 8 10 12 14 16 18 20 GPIO0 DGND GPIO1 GPIO2 DGND GPIO3 GPIO4 SCL DGND SDA WP R3 REFREF+ R7 CNTL CLKX CLKR FSX FSR DX DR INT TOUT GPIO5 5 0 ohm 1 3 5 7 9 11 13 15 17 19 SDA R2 A0 A1 A2 UL LL UR LR WIPER AUXIN 2 4 6 8 10 12 14 16 18 20 +VCC +VCC 1 3 5 7 9 11 13 15 17 19 R1 REF3125AIDBZ B J3A (TOP) = SAM_TSM-105-01-L-DV-P J3B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K TP1 J3 +VCC C7 10uF 6 4 2 JMP4 5 3 1 +5VA DGND ANALOG POWER 1 3 5 7 9 +VA +5VA DGND +1.8VD +3.3VD -VA -5VA AGND VD1 +5VD 2 4 6 8 10 AGND TP2 DAUGHTER-POWER +3.3Vd L1 100uH +VD1 L2 100uH ti A DATA ACQUISITION PRODUCTS HIGH-PERFORMANCE ANALOG DIVISION SEMICONDUCTOR GROUP 6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA TITLE ENGINEER RICK DOWNS DRAWN BY ROBERT BENJAMIN ADS7845 Evaluation Module DOCUMENT CONTROL NO. 6478717 SHEET 1 2 3 4 5 1 OF 1 FILE SIZE B REV A DATE 7-Mar-2006 C:\WORK\ADS7845EVM\SCH\ADS7845EVM 6 A 1 2 3 4 6 5 REVISION HISTORY REV IOVDD R5 2.7K 2 5 9 12 1 USB MCK 4 10 USB I2S 13 J6 Q2 ZXMN6A07F EXTERNAL I2C SDA SCL WP 8 A0 A1 A2 U1 VCC C9 1uF 4 1 1 3 5 7 9 11 3 2 44 43 42 41 40 39 37 38 36 35 34 32 R12 3.09K .001uF R10 27.4 R11 C13 47pF C14 47pF R7 2.7K JMP8 1 2 P1.2 P1.1 P1.0 +3.3VD C11 1uF C12 1uF C MOSI SS SCLK RESET 14 VCC J15 1 3 5 7 9 11 3 6 8 11 1Y 2Y 3Y 4Y 7 GND 2 4 6 8 10 12 EXTERNAL SPI USB RST USB SPI P3.5 JMP13 1 2 D2 +3.3VD YELLOW C25 R8 2.7K P3.4 JMP14 1 2 IOVDD P3.3 B U6 1uF 4 2 INT 3 J8 5 B 1A 2A 3A 4A 1OE 2OE 3OE 4OE JMP12 1 2 SML-LX0603YW-TR MISO SN74LVC1G07DBV SN74LVC125APW MRESET 649 2 U4 2 5 9 12 1 4 10 13 USB ACTIVE R13 4 1uF JMP11 1 2 C10 1uF EXTERNAL AUDIO DATA C27 IOVDD JMP10 1 2 C24 1uF SW DIP-8 P1.3 JMP9 1 2 SN74LVC1G07DBV ED555/2DS +5VD EXT PWR IN +1.8VD R14 390 U9 5 6 4 1 2 3 6VDC-10VDC IN D3 SML-LX0603GW-TR JMP6 PWR SELECT GREEN 3 9 U2 REG1117-5 3 C15 DL4001 0.1uF VIN C16 0.33uF VOUT GND D1 10 11 12 2 R15 10K C6 10uF 1 J9 R16 10K +5VD A +3.3VD +1.8VD IOVDD JMP7 1 2 3 4 5 6 TP6 1IN 1IN 1EN 1GND 2GND 2EN 2IN 2IN 1RESET 1OUT 1OUT 2RESET 2OUT 2OUT TPS767D318PWP CUI-STACK PJ102-B 2.5 MM SW1 1 2 4 3 24 23 22 18 17 R17 100K C7 10uF D5 SML-LX0603IW-TR R18 100K R4 10 +3.3VD RED R19 220 !" C8 10uF D4 SML-LX0603GW-TR C17 0.33uF 1.8VD ENABLE 3.3VD ENABLE 28 GREEN DATA ACQUISITION PRODUCTS REGULATOR ENABLE 6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA TITLE ENGINEER RICK DOWNS USB-MODEVM INTERFACE DRAWN BY ROBERT BENJAMIN DOCUMENT CONTROL NO. 6463996 SHEET 1 2 A HIGH PERFORMANCE ANALOG DIVISION SEMICONDUCTOR GROUP IOVDD SELECT 1 SW2 1 2 3 4 5 6 7 8 PWR_DWN U7 31 30 29 27 26 25 24 23 8 21 33 2 16 15 14 13 12 11 10 9 2 4 6 8 10 12 1uF TP11 +3.3VD IOVDD C26 3 P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 DVDD DVDD DVDD AVDD 9 10 11 12 13 14 15 17 18 19 20 22 27.4 XTALO XTALI PLLFILI PLLFILO MCLKI PUR DP DM DVSS DVSS DVSS AVSS MRESET TEST EXTEN RSTO P3.0 P3.1 P3.2/XINT P3.3 P3.4 P3.5 NC NC 7 1 2 3 1.5K +3.3VD U8 TAS1020BPFB SCL SDA VREN RESET MCLKO2 MCLKO1 CSCLK CDATO CDATI CSYNC CRESET CSCHNE 46 47 48 1 3 5 6 7 4 16 28 45 100pF C21 R9 J14 1uF 33pF MA-505 6.000M-C0 6.00 MHZ J7 USB SLAVE CONN 897-30-004-90-000000 I2SDOUT C23 U5 C19 C20 4 3 2 1 BCLK SN74LVC1G07DBV 33pF 24LC64I/SN GND D+ DVCC X1 C18 A0 A1 A2 USB I2S USB MCK USB SPI USB RST EXT MCK LRCLK IOVDD 4 VSS R20 75 MCLK 7 GND R6 2.7K RA1 10K I2SDIN 6 5 +3.3VD SCL C SN74LVC1G125DBV 3 6 8 11 1Y 2Y 3Y 4Y D 2 SN74LVC125APW +3.3VD TP10 14 VCC +3.3VD 5 1 3 1A 2A 3A 4A 1OE 2OE 3OE 4OE 5 2 4 4 1uF U3 APPROVED J10 EXT MCLK U10 3 R3 2.7K TP9 SDA 1uF 5 C22 Q1 ZXMN6A07F D C28 IOVDD IOVDD +3.3VD ENGINEERING CHANGE NUMBER 3 4 5 OF 2 FILE SIZE B REV B DATE 28-Oct-2004 D:\USB-MODEVM\USB Motherboard - ModEvm.ddb - Documents\USB Interface 6 1 2 3 4 5 6 REVISION HISTORY REV ENGINEERING CHANGE NUMBER APPROVED D 1 2 3 D J11 J12 A0(+) A1(+) A2(+) A3(+) A4 A5 A6 A7 REFREF+ 2 4 6 8 10 12 14 16 18 20 +5VA J13A (TOP) = SAM_TSM-105-01-L-DV-P J13B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K DAUGHTER-ANALOG J11A (TOP) = SAM_TSM-110-01-L-DV-P J11B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K +5VA +5VD JMP1 1 2 +VA +5VA DGND +1.8VD +3.3VD -VA -5VA AGND VD1 +5VD 2 4 6 8 10 GPIO0 DGND GPIO1 GPIO2 DGND GPIO3 GPIO4 SCL DGND SDA SCLK SS P3.3 J12A (TOP) = SAM_TSM-110-01-L-DV-P J12B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K +5VA TP2 10uF C2 +5VD TP3 10uF C3 TP4 10uF JMP3 PWR_DWN INT JMP4 MISO +3.3VD MOSI R1 R21 390 J1 -5VA R22 390 SCL 2.7K J2 +5VA D6 SML-LX0603GW-TR D7 SML-LX0603GW-TR GREEN GREEN J3 +5VD TP5 +1.8VD C RESET IOVDD 2 C1 P3.5 P1.0 1 -5VA P3.4 +5VD JMP2 1 2 TP1 JMP5 2 4 6 8 10 12 14 16 18 20 -5VA DAUGHTER-POWER TP7 TP8 AGND DGND JPR-2X1 C CNTL CLKX CLKR FSX FSR DX DR INT TOUT GPIO5 DAUGHTER-SERIAL J13 1 3 5 7 9 1 3 5 7 9 11 13 15 17 19 2 A0(-) A1(-) A2(-) A3(-) AGND AGND AGND VCOM AGND AGND 1 1 3 5 7 9 11 13 15 17 19 C4 C5 10uF 10uF J4 +1.8VD R2 SDA 2.7K I2SDOUT J5 +3.3VD I2SDIN LRCLK BCLK J21 1 3 5 7 9 11 13 15 17 19 B A0(-) A1(-) A2(-) A3(-) AGND AGND AGND VCOM AGND AGND J22 A0(+) A1(+) A2(+) A3(+) A4 A5 A6 A7 REFREF+ 2 4 6 8 10 12 14 16 18 20 1 3 5 7 9 11 13 15 17 19 +5VA DAUGHTER-ANALOG J21A (TOP) = SAM_TSM-110-01-L-DV-P J21B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K +1.8VD +VA +5VA DGND +1.8VD +3.3VD GPIO0 DGND GPIO1 GPIO2 DGND GPIO3 GPIO4 SCL DGND SDA 2 4 6 8 10 12 14 16 18 20 P1.1 B P1.2 P1.3 MCLK DAUGHTER-SERIAL J23 1 3 5 7 9 CNTL CLKX CLKR FSX FSR DX DR INT TOUT GPIO5 -VA -5VA AGND VD1 +5VD 2 4 6 8 10 -5VA J22A (TOP) = SAM_TSM-110-01-L-DV-P J22B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K DAUGHTER-POWER +3.3VD +5VD J23A (TOP) = SAM_TSM-105-01-L-DV-P J23B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K !" A DATA ACQUISITION PRODUCTS A HIGH-PERFORMANCE ANALOG DIVISION SEMICONDUCTOR GROUP 6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA TITLE ENGINEER RICK DOWNS DRAWN BY ROBERT BENJAMIN USB-MODEVM INTERFACE DOCUMENT CONTROL NO. 6463996 SHEET 2 1 2 3 4 5 OF 2 FILE SIZE B REV B DATE 28-Oct-2004 D:\USB-MODEVM\USB Motherboard - ModEvm.ddb - Documents\Daughtercard Interface 6 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User's Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. 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TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. 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