MAX7325EVKIT+

19-1033; Rev 0; 11/07 MAX7325 Evaluation Kit/Evaluation System The MAX7325 evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that demonstrates the capabilities of the MAX7325 I 2 C port expander with eight push-pull outputs and eight opendrain I/Os. The MAX7325 EV kit also includes Windows® 2000/XP/Vista-compatible software that provides a simple graphical user interface (GUI) for exercising the MAX7325’s features. The MAX7325 evaluation system (EV system) includes a MAX7325 EV kit and a Maxim CMAXQUSB serialinterface board. The CMAXQUSB board connects to a PC’s USB port and allows the transfer of I2C commands to the MAX7325 EV kit. The EV kit comes with the MAX7325ATG+ installed. Features ♦ 400kHz, 2-Wire Serial Interface ♦ 1.71V to 5.5V Operation ♦ 8 Push-Pull Output Ports ♦ 8 Open-Drain I/O Ports, Rated to 20mA Sink Current ♦ Input Ports are Overvoltage Protected to 6V ♦ Proven PCB Layout ♦ Windows 2000/XP/Vista (32-Bit)-Compatible Software ♦ Fully Assembled and Tested ♦ EV System: USB PC Connection Ordering Information PART TYPE MAX7325EVKIT+ EV Kit MAX7325EVCMAXQU+ EV System +Denotes lead-free and RoHS-compliant. Note: The MAX7325 EV kit software is designed for use with the complete EV system (MAX7325EVCMAXQU+). The EV system includes both the Maxim CMAXQUSB board and the EV kit (MAX7325EVKIT+). If the Windows software will not be used, the EV kit board can be purchased without the Maxim CMAXQUSB board. Component Lists MAX7325 EV System PART QTY MAX7325EVKIT+ 1 CMAXQUSB+ 1 DESCRIPTION MAX7325 EV kit Serial-interface board MAX7325 EV kit DESIGNATION QTY C1 1 DESCRIPTION C2 1 C3 1 D1, D3, D5, D6 4 10µF ±10%, 6.3V X5R ceramic capacitor (0805) TDK C2012X5R0J106K 0.1µF ±10%, 25V X7R ceramic capacitor (0603) TDK C1608X7R1E104K 47pF ±10%, 50V C0G ceramic capacitor (0603) TDK C1608C0G1H470J Red LEDs (PLCC) D2, D4 2 Green LEDs (PLCC) DESIGNATION QTY DESCRIPTION J1 1 2 x 10 right-angle female receptacle JU1, JU2 2 5-pin, 4-way headers JU3 1 2-pin header 3-pin header JU4 1 R1–R6 6 150Ω ±5% resistors (0603) R7, R8, R9 3 10kΩ ±5% resistors (0603) R10, R11 0 Not installed, resistors (0603) R12 1 2kΩ ±5% resistor (0603) S1–S4 4 U1 1 — 1 Pushbutton switches Maxim I2C port expander with 8 push-pull outputs and 8 open-drain I/Os MAX7325ATG+ (24-pin TQFN-EP*, 4mm x 4mm) PCB: MAX7325 Evaluation Kit+ *EP = Exposed paddle. Windows is a registered trademark of Microsoft Corp. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 Evaluate: MAX7325 General Description Evaluate: MAX7325 MAX7325 Evaluation Kit/Evaluation System Component Supplier SUPPLIER TDK Corp. PHONE 847-803-6100 WEBSITE www.component.tdk.com Note: Indicate that you are using the MAX7325 when contacting this component supplier. MAX7325 EV Kit Files FILE DESCRIPTION INSTALL.EXE Installs the EV kit files on your computer MAX7325.EXE Application program FTD2XX.INF USB device driver file UNINST.INI Uninstalls the EV kit software USB_Driver_Help.PDF USB driver installation help file Quick Start Recommended Equipment Before beginning, the following equipment is needed: • The MAX7325 EV system MAX7325 EV kit Maxim CMAXQUSB board USB cable (included with CMAXQUSB) • A user-supplied Windows 2000/XP/Vista-compatible PC with a spare USB port Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. Procedure 1) Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 7325Rxx.ZIP. Save the EV kit software to a temporary folder and uncompress the ZIP file. 2) Install the MAX7325 evaluation software on your computer by running the INSTALL.EXE program inside the temporary folder. The program files are copied and icons are created in the Windows Start menu. 2 3) Enable the I2C pullup resistors on the CMAXQUSB board by setting the DIP switches on SW1 to the ON position. 4) For the MAX7325 EV kit, make sure that the shunts of all jumpers are in the following default positions: JU1: (1-3) JU2: (1-4) Combined with JU2 makes I 2 C address = 0xC0, 0xA0 Combined with JU1 makes I 2 C address = 0xC0, 0xA0 JU3: (Open) Normal operation JU4: (2-3) CMAXQUSB provides the power supply 5) Connect the boards by aligning the MAX7325 EV kit’s 20-pin connector with the 20-pin connector of the CMAXQUSB board. 6) Connect the USB cable from the PC to the CMAXQUSB board. A Building Driver Database window pops up in addition to a New Hardware Found message if this is the first time it is used on the PC. If you do not see a window that is similar to the one described above after 30s, remove the USB cable from the CMAXQUSB and reconnect it. Administrator privileges are required to install the USB device driver on Windows 2000/XP/Vista. 7) Follow the directions of the Add New Hardware Wizard to install the USB device driver. Choose the Search for the best driver for your device option. Specify the location of the device driver to be C:\Program Files\MAX7325 (default installation directory) using the Browse button. During device driver installation, Windows may show a warning message indicating that the device driver Maxim uses does not contain a digital signature. This is not an error condition and it is safe to proceed with installation. Refer to the USB_Driver_Help.PDF document for additional information. 8) Start the MAX7325 EV kit software by opening its icon in the Start menu. The GUI main window will appear, as shown in Figure 1. 9) Check or uncheck the O8 and O9 checkboxes above the Write button, which is inside the Group B Ports group box. Press the Write button and observe the light change of the LEDs on the EV kit board. _______________________________________________________________________________________ MAX7325 Evaluation Kit/Evaluation System To start the MAX7325 EV kit software, double click the MAX7325 EV kit icon that is created during installation. The GUI main window appears, as shown in Figure 1. There are four group boxes on the MAX7325 EV kit GUI software: Group A Ports, Group B Ports, I2C Addresses, and Interrupt Status. Group A Ports Group Box The Group A Ports group box shown in Figure 1 contains the Write group box and the Read group box. The Read group box consists of two sections: Port Status and Flag Status. Pressing the Single-byte Read button only reads the port status. Pressing the Two-byte Read button will read both port status and flag status. Refer to the MAX7325 IC data sheet for a detailed description. Group B Ports Group Box The Group B Ports group box also contains a Write group box and a Read group box. Check or uncheck the desired checkboxes in the Write group box and press the Write button to write the port settings to the device. Press the Read button to read the port status. Check or uncheck the desired checkboxes in the Write group box and press the Write button to write the port settings to the device. Figure 1. MAX7325 Evaluation Software Main Window _______________________________________________________________________________________ 3 Evaluate: MAX7325 Detailed Description of Software Evaluate: MAX7325 MAX7325 Evaluation Kit/Evaluation System I2C Addresses Group Box Interrupt Status Group Box The I2C Addresses drop-down list automatically detects the MAX7325’s I2C slave address when the GUI software starts. If multiple devices are connected to the I2C bus, the user can use this drop-down list to manually change the device’s I2C slave address according to the shunt position of JU1 and JU2, as shown in Table 1. The Interrupt Status group box shows the current status of the MAX7325 INT pin (active-low, latching transition-detection interrupt output). Table 1. The I2C Address Configuration SHUNT POSITION I2C ADDRESS JU2 JU1 1-4 (SCL)* 1-3 (GND)* 1-4 (SCL) 1-2 (VCC) 1100001x (0xC2) and 1010001x (0xA2) 1-4 (SCL) 1-4 (SCL) 1100010x (0xC4) and 1010010x (0xA4) 1-4 (SCL) 1-5 (SDA) 1100011x (0xC6) and 1010011x (0xA6) 1-5 (SDA) 1-3 (GND) 1100100x (0xC8) and 1010100x (0xA8) 1-5 (SDA) 1-2 (VCC) 1100101x (0xCA) and 1010101x (0xAA) 1-5 (SDA) 1-4 (SCL) 1100110x (0xCC) and 1010110x (0xAC) 1100111x (0xCE) and 1010111x (0xAE) 1100000x (0xC0) and 1010000x (0xA0) 1-5 (SDA) 1-5 (SDA) 1-3 (GND) 1-3 (GND) 1101000x (0xD0) and 1011000x (0xB0) 1-3 (GND) 1-2 (VCC) 1101001x (0xD2) and 1011001x (0xB2) 1-3 (GND) 1-4 (SCL) 1101010x (0xD4) and 1011010x (0xB4) 1-3 (GND) 1-5 (SDA) 1101011x (0xD6) and 1011011x (0xB6) 1-2 (VCC) 1-3 (GND) 1101100x (0xD8) and 1011100x (0xB8) 1-2 (VCC) 1-2 (VCC) 1101101x (0xDA) and 1011101x (0xBA) 1-2 (VCC) 1-4 (SCL) 1101110x (0xDC) and 1011110x (0xBC) 1-2 (VCC) 1-5 (SDA) 1101111x (0xDE) and 1011111x (0xBE) *Default position. 4 _______________________________________________________________________________________ MAX7325 Evaluation Kit/Evaluation System The MAX7325 has eight push-pull outputs and eight open-drain I/Os. The MAX7325 EV kit board provides a proven layout for evaluating the MAX7325. The EV kit comes with a MAX7325ATG+ installed. Hardware-Reset Control The hardware-reset function is controlled by jumper JU3, as shown in Table 2. Putting a shunt in the 1-2 position resets all registers and puts the device in the power-on-reset state. Table 2. RST Jumper Configuration JUMPER SHUNT POSITION DESCRIPTION 1-2 Reset Open* Normal operation JU3 *Default position. Power Supplies The MAX7325 EV kit can either be powered from the CMAXQUSB (2.5V, 3.3V, and 5V) or from a usersupplied 1.71V to 5.5V power supply connecting to VDD, as shown in Table 3. If a user-supplied power supply is used, ensure that the voltage setting is compatible with the CMAXQUSB JU1 setting. Table 3. V+ Selection Configuration JUMPER SHUNT POSITION DESCRIPTION 1-2 User-supplied 1.71V to 5.5V power supply (VDD) 2-3* Powered by CMAXQUSB JU4 *Default position. User-Supplied I2C Interface I2C Address Configuration The combination of shunt positions of jumpers JU1 and JU2 determine the I2C slave address of the MAX7325 EV kit. See Table 1 to select the appropriate setting. To use the MAX7325 EV kit with a user-supplied I2C interface, install a shunt on jumper JU4’s 1-2 position. Connect SDA, SCL, and GND lines from the usersupplied I2C interface to the SDA, SCL, and GND pads on the MAX7325 EV kit. Apply a 1.71V to 5.5V power supply to the VDD pad of the MAX7325 EV kit. Depending on the configuration of the user-supplied I2C interface, it may be necessary to install I2C pullup resistors, R10 and R11. _______________________________________________________________________________________ 5 Evaluate: MAX7325 Detailed Description of Hardware 6 9 10 19 20 SCL SDA GND 15 17 16 18 11 7 8 13 5 6 14 3 4 12 1 J1 2 GND VDD 3 1 Figure 2. MAX7325 EV Kit Schematic _______________________________________________________________________________________ P3 P2 P1 P0 2 R9 10kΩ SDA JU3 JU4 VCC VCC R10 OPEN S4 S3 S2 S1 5 1 VCC SDA 4 2 VCC R12 2kΩ 3 JU1 SCL SCL SDA O9 VCC R11 OPEN 5 1 4 3 R4 150Ω R3 150Ω SDA C1 10μF 2 JU2 VCC C3 47pF VCC D4 9 24 18 23 22 19 20 C2 0.1μF 21 GND AD2 AD0 RST INT SCL SDA V+ D3 O8 VCC O13 MAX7325 P0 P1 P2 P3 P4 P5 P6 P7 O8 O9 O10 O11 O12 O14 U1 O15 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 R2 150Ω R1 150Ω P0 P1 P2 R8 P3 10kΩ O8 O9 R5 150Ω R6 150Ω D2 R7 10kΩ VCC D1 VCC P4 P5 P6 P7 O10 O11 O12 O13 O14 O15 D5 D6 VCC VCC VCC Evaluate: MAX7325 MAX7325 Evaluation Kit/Evaluation System MAX7325 Evaluation Kit/Evaluation System Evaluate: MAX7325 Figure 3. MAX7325 EV Kit Component Placement Guide— Component Side Figure 4. MAX7325 EV Kit PCB Layout—Component Side _______________________________________________________________________________________ 7 Evaluate: MAX7325 MAX7325 Evaluation Kit/Evaluation System Figure 5. MAX7325 EV Kit PCB Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. Boblet