19-4475; Rev 0; 2/09 MAX13362 Evaluation Kit The MAX13362 evaluation kit (EV kit) provides a proven design to evaluate the MAX13362 24-channel automotive contact monitor. The EV kit also includes Windows® 2000/XP- and Windows Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the MAX13362. The MAX13362 EV kit printed circuit board (PCB) comes with a MAX13362ATL/V+ installed. Features ♦ Accepts 9VDC to 28VDC Battery Supply ♦ Windows 2000/XP/Vista (32-Bit)-Compatible Software ♦ USB PC Connection (Cable Included) ♦ Lead(Pb)-Free and RoHS-Compliant ♦ SPI™ Interface Terminals ♦ Proven PCB Layout ♦ Fully Assembled and Tested Ordering Information PART TYPE MAX13362EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS-compliant. Component List DESIGNATION QTY C1 1 C2, C11, C46 0 C3, C45 2 C4 1 C5–C9, C17, C18, C37, C47 9 C10 1 C12, C13, C14, C19–C29, C32–C36, C41–C44, C52 C15, C16 DESCRIPTION 47µF ±10%, 50V aluminum electrolytic capacitor (6.3mm diameter; Panasonic VS series size D8) Panasonic ECG EEE-1HA470XP Not installed, capacitors (1206) 0.1µF ±10%, 50V X7R ceramic capacitors (0603) TDK C1608X7R1H104K 0.033µF ±10%, 16V X5R ceramic capacitor (0603) Taiyo Yuden EMK107BJ333KA 0.1µF ±10%, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104K 2.2µF ±10%, 10V X7R ceramic capacitor (0805) Murata GRM21BR71A225K 24 47000pF ±10%, 50V X7R ceramic capacitors (0603) Murata GRM188R71H473K 2 10pF ±5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H100J Windows and Windows Vista are registered trademarks of Microsoft Corp. DESIGNATION QTY DESCRIPTION C48–C51, C53 0 22pF ±5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H220J 10µF ±20%, 16V X5R ceramic capacitors (1206) Murata GRM31CR61C106M 1µF ±10%, 16V X5R ceramic capacitors (0603) TDK C1608X5R1C105K Not installed, capacitors (0603) D1, D3 2 Red LEDs (0805) D2 1 F1 1 H1–H4 4 Diode, 1N4001 (DO41) 60V, 0.14A Raychem polyswitch (1812) Tyco MINISMDC014F 10-pin headers J1 1 J2 1 USB series B right-angle PC-mount receptacle 2 x 9 dual-row header J3 0 Not installed C30, C31 2 C38, C40, C55 3 C39, C54 2 JU1 1 3-pin header JU2–JU9 8 L6 1 2-pin headers Ferrite bead TDK MMZ1608R301A (0603) SPI is a trademark of Motorola, Inc. ________________________________________________________________ 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 Evaluates: MAX13362 General Description MAX13362 Evaluation Kit Evaluates: MAX13362 Component List (continued) DESIGNATION QTY P0–P23 0 Not installed DESCRIPTION R1, R2 2 27Ω ±5% resistors (0603) R3 1 1.5kΩ ±5% resistor (0603) R4, R7 2 470Ω ±5% resistors (0603) R5 1 2.2kΩ ±5% resistor (0603) R6 1 10kΩ ±5% resistor (0603) R8 1 0Ω resistor (0603) R10, R11, R17, R18, R19 5 100Ω ±5% resistors (0603) R12–R16 0 Not installed, resistors—short (PC trace) (0402) DESIGNATION QTY DESCRIPTION U2 1 3.3V LDO, 40V input (8 SO-EP*) Maxim MAX15007AASA+ U3 1 3.3V LDO regulator (5 SC70) Maxim MAX8511EXK33+ U4 1 Microcontroller (68 QFN-EP*) Maxim MAXQ2000-RAX+ U5 1 USB UART (32-pin TQFP, 7 x 7) FTDI FT232BL U6 1 93C46 type 3-wire EEPROM (8 SO) Atmel AT93C46A-10SU-2.7 U7 1 2.5V LDO regulator (5 SC70) Maxim MAX8511EXK25+ R20 1 330Ω ±5% resistor (0603) R21 1 33kΩ ±5% resistor (0603) Y2 1 16MHz crystal (HCM49 surface mount) SW0–SW3, SW23 5 PCB-mount toggle switches, SPDT, ON-OFF-ON (7103) Y3 0 Not installed, crystal SW4–SW22 19 PCB-mount toggle switches, SPDT, ON-ON (7101) Y4 1 6MHz crystal (HCM49 surface mount) TB1 1 Terminal block — 16 Shunts 1 1 24-channel automotive switch monitor (40 TQFN) Maxim MAX13362ATL/V+ — U1 USB high-speed A-to-B cable, 5ft (1.5m) — 1 PCB: MAX13362 Evaluation Kit+ *EP = Exposed pad. MAX13362 EV Kit Files FILE DESCRIPTION MAX13362.EXE Application program FTD2XX.INF USB device driver file USB_Driver_Help.PDF USB driver installation help file Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Panasonic Corp. 800-344-2112 www.panasonic.com Taiyo Yuden 800-348-2496 www.t-yuden.com TDK Corp. 847-803-6100 www.component.tdk.com Tyco Electronics/M/A-COM 978-442-5000 www.macom.com Note: Indicate that you are using the MAX13362 when contacting these component suppliers. 2 _______________________________________________________________________________________ MAX13362 Evaluation Kit Recommended Equipment • MAX13362 EV kit (USB cable included) • A user-supplied Windows 2000/XP- or Windows Vista-compatible PC with a spare USB port • Power supply, 9VDC to 28VDC at 400mA 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 The MAX13362 EV kit is fully assembled and tested. Follow the steps below to verify board operation. 1) Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 13362Rxx.ZIP. Save the EV kit software to a temporary folder and uncompress the ZIP file. 2) Install the EV kit 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 | Programs menu. 3) Verify that all jumpers (JU1–JU9) are in their default positions, as shown in Table 1. 4) Connect the external 9VDC to 28VDC power supply to terminal block TB1. 5) Connect the USB cable from the PC to the EV kit board. A Building Driver Database window will pop up in addition to a New Hardware Found message when installing the USB driver for the first time. If you do not see a window that is similar to the one described above after 30s, remove the USB cable from the board and reconnect it. Administrator privileges are required to install the USB device driver on Windows 2000/XP/Vista. 6) 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\MAX13362 (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 included with the software for additional information. 7) Start the MAX13362 EV kit software by opening its icon in the Start | Programs menu. The EV kit software main window appears, as shown in Figure 1. 8) Press function key F1 to configure the EV kit for wetting current 10mA, interrupts enabled, continuous mode operation. 9) Flip the switches SW0–SW23 on the EV kit, and observe the updated switch status shown on the GUI. When the switch lever is moved towards U1, the switch is closed to switch ground SWGND. Switches 0, 1, 2, 3, and 23 connect to VBAT when the lever is moved away from U1, and are open when the lever is centered. Detailed Description of Software The software automatically performs SPI transfers to update the device, unless the Options | Polling menu item has been unchecked. The main window of the evaluation software is shown in Figure 1. Configuration data is written to the MAX13362 by clicking the buttons Write00xxx, Write10xx, and Write01xx. When writing configuration data, 32-bit SPI transfers are performed regardless of INT. Status is updated as a result of configuration writes. Status can be read from the MAX13362 without changing configuration, by clicking the button Write11xx. The software cannot read back the values written to the device registers. _______________________________________________________________________________________ 3 Evaluates: MAX13362 Quick Start Evaluates: MAX13362 MAX13362 Evaluation Kit Figure 1. MAX13362 EV Kit Software Main Window Evaluating Continuous Mode Operation—Conditional Read When Polling Time is set to 0000 (continuous mode), the INT pin is actually used as a data-available status indicator. The software requests updated INT status by pulsing CS low and then high. The INT pin will go high in response to CS low logic level, and after CS returns high then INT will indicate whether new data is available. If INT is high, the software immediately knows that there has not been any change in the switches. However, if INT goes low in response to the CS low-tohigh pulse, then the software drives CS low again and uses a standard 32-bit SPI transfer to read the updated status. This 32-bit transfer is repeated unless INT remains high after CS returns high. 4 Evaluating Polling Mode Operation When Polling Time is not 0000, the INT pin conditions the standard 32-bit SPI transfer. When the INT pin is low, the software drives CS low and performs a 32-bit SPI transfer. If the INT pin is high, no transfer occurs. Evaluating Hardware Shutdown The software drives the SD pin low to drive the MAX13362 into hardware shutdown. Exiting shutdown requires driving SD high and also rewriting all three command words. Detailed Description of Hardware The MAX13362 EV kit provides a proven layout for the MAX13362. An on-board 3.3V LDO regulator, SPI interface pads, and easy-to-use USB-PC connection are included on the EV kit. _______________________________________________________________________________________ MAX13362 Evaluation Kit Evaluates: MAX13362 Table 1. MAX13362 EV Kit Jumper Descriptions JUMPER SIGNAL JU1 EN JU2 IN0 JU3 IN1 JU4 IN2 JU5 IN3 JU6 IN23 JU7 SWGND JU8 VDD JU9 U2 IN SHUNT POSITION 1-2* Enable MAX15007 3.3V LDO 2-3 Disable MAX15007 3.3V LDO 1-2* Configure SW0 for low-side input Open 1-2* Open 1-2* Open 1-2* Open 1-2* Open 1-2* DGND J2 CS SDO CLK INT DGND Configure SW1 for low-side input Configure SW1 for VBAT input Configure SW2 for low-side input Configure SW2 for VBAT input Configure SW3 for low-side input Configure SW3 for VBAT input Configure SW23 for low-side input Configure SW23 for VBAT input Connects switch ground SWGND to ground Use external connection for switch ground return 1-2* U1 VDD is powered by U2 MAX15007 3.3V LDO Open Open 1-2* Open 3-4 Open* An external supply must be connected to VDD Power U2 MAX15007 from external battery supply VS Disconnect U2 MAX15007 from battery supply VS. An external supply must be connected to VDD (header J2, pin 5). Connects SD to on-board 3.3V microcontroller External microcontroller must connect to SD DGND test points; spare shunt storage DGND test points; spare shunt storage 5-6 Powers VDD from USB (U7 MAX8511) instead of battery supply. (Requires JU1 = 2-3 to disable U2 MAX15007.) Open* VDD is independent from 3.3V microcontroller power supply. VDD must be powered by either U2 or by an external user-supplied power source. See the User-Supplied SPI Interface section VDD SDI Configure SW0 for VBAT input Open 1-2* SD FUNCTION 7-8* Connects SDI to on-board 3.3V microcontroller Open External microcontroller must connect to SDI 9-10* Connects CS to on-board 3.3V microcontroller Open External microcontroller must connect to CS 11-12* Connects SDO to on-board 3.3V microcontroller Open External microcontroller must connect to SDO 13-14* Connects CLK to on-board 3.3V microcontroller Open External microcontroller must connect to CLK 15-16* Connects INT to on-board 3.3V microcontroller Open External microcontroller must connect to INT 17-18* DGND test points; spare shunt storage Open DGND test points; spare shunt storage *Default position. _______________________________________________________________________________________ 5 Evaluates: MAX13362 MAX13362 Evaluation Kit Power Supplies and Ground Returns Measuring Supply Current An external high-voltage battery (28VDC max) connects to the board through terminal block TB1. External 9VDC to 28VDC VBAT power must be provided for normal operation. An on-board LDO regulator, MAX15007 (U2), supplies 3.3V power for the MAX13362 (U1). Input protection on VBAT consists of a series diode (D2) to protect against reverse polarity connection, and also a self-resetting polyfuse (F1) to protect against overcurrent faults. Because the EV kit demonstrates the low quiescent current of the DUT, there is no other circuitry connected to VBAT besides U1 and its external 3.3V LDO regulator. The USB interface powers on-board MINIQUSB-equivalent circuitry, providing the SPI interface to the software. Refer to the MINIQUSB User’s Manual for a detailed description of the microcontroller circuit. There are three distinct ways to power the EV kit. The factory-default configuration uses an on-board lowdropout linear regulator (U2, MAX15007) to power U1 VDD from the battery. In this mode, the battery supply current is the sum of U1 VS load current, plus U1 VDD load current, plus the quiescent current of the MAX15007 (11µA nominal for 5µA load current). The MAX15007 can be shut down using jumper JU1. The on-board microcontroller is powered from the USB interface. To power the EV kit using independent external VS and VDD supplies, remove the shunts from JU8 and JU9 (disconnecting the MAX15007 regulator). Connect the external VDD supply to header H2 pin 7. The on-board MAXQ2000 microcontroller is limited to 3.3V. For 5V VDD, see the User-Supplied SPI Interface section. Connect a DVM to J2 pin 5 to monitor the VDD supply at U1, and compensate for a possible current measurement voltage drop. There are three ground returns. All switch returns SW0–SW23 connect to switch ground. The switch-associated capacitors connect to analog ground. The microcontroller and its associated circuitry connect to digital ground. Switch ground connects to analog ground through jumper JU7. Analog ground connects to digital ground through 0Ω SMT resistor R8. Finally, the EV kit can be configured to power VDD from the USB port, regulated by U3 MAX8511. In this mode, the battery current powers VS only, and VDD current is not measured. Table 2. Jumper Configuration for Measuring Supply Current 6 SUPPLY CURRENT MEASUREMENT U1 VDD SOURCE JU1 SHUNT POSITION JU8 SHUNT POSITION JU9 SHUNT POSITION J2 VDD SHUNT POSITION Combined: IVS = U1 VS current + U1 VDD current + U2 quiescent current U2 MAX15007 LDO, powered by battery 1-2 1-2 1-2 Open Independent: IVS = U1 VS current IVDD = U1 VDD current External supply 2-3 Open Open Open VS only: IVS = U1 VS current IVDD not measured U3 MAX8511 LDO, powered by USB 2-3 Open Open 1-2 _______________________________________________________________________________________ MAX13362 Evaluation Kit external SPI CS, SCLK, DIN, and DOUT signals to the corresponding CS, CLK, SDO, and SDI test points on the MAX13362 EV kit board. See Table 3. Configure SPI for CPOL = 0, CPHA = 1, SCLK = 4MHz. Table 3. Header J2 External SPI Bus Connections J2 PIN LABEL MAX13362 SIGNAL 1 SD SD EXTERNAL CONNECTION 3 DGND DGND 5 VDD VDD External 3.3V power supply 7 SDI SDI SPI data input to MAX13362, output from SPI master SPI chip-select input to MAX13362 Shutdown input to MAX13362 Digital ground return 9 CS CS 11 SDO SDO SPI data output from MAX13362, input to SPI master 13 CLK CLK SPI clock input to MAX13362 Interrupt output from MAX13362 15 INT INT 17 DGND DGND Digital ground return _______________________________________________________________________________________ 7 Evaluates: MAX13362 User-Supplied SPI Interface To use the MAX13362 EV kit with a user-supplied SPI interface, first remove all shunts from J2. Next, apply an external 3.3V power supply to J2 pin 5 (VDD). Connect Evaluates: MAX13362 MAX13362 Evaluation Kit Figure 2a. MAX13362 EV Kit Schematic (Sheet 1 of 4) 8 _______________________________________________________________________________________ MAX13362 Evaluation Kit Evaluates: MAX13362 Figure 2b. MAX13362 EV Kit Schematic (Sheet 2 of 4) _______________________________________________________________________________________ 9 Evaluates: MAX13362 MAX13362 Evaluation Kit Figure 2c. MAX13362 EV Kit Schematic (Sheet 3 of 4) 10 ______________________________________________________________________________________ MAX13362 Evaluation Kit Evaluates: MAX13362 Figure 2d. MAX13362 EV Kit Schematic (Sheet 4 of 4) ______________________________________________________________________________________ 11 Evaluates: MAX13362 MAX13362 Evaluation Kit Figure 3. MAX13362 EV Kit Component Placement Guide—Component Side 12 ______________________________________________________________________________________ MAX13362 Evaluation Kit Evaluates: MAX13362 Figure 4. MAX13362 EV Kit PCB Layout—Component Side ______________________________________________________________________________________ 13 Evaluates: MAX13362 MAX13362 Evaluation Kit Figure 5. MAX13362 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. 14 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.