MAX1168 Evaluation Kit/Evaluation System

Transcription

1 9-299; Rev ; /07 MAX68 Evaluation Kit/Evaluation System General Description The MAX68 evaluation system (EV system) is a complete 8-channel, 6-bit data-acquisition system that is comprised of a MAX68 evaluation kit (EV kit), Maxim 68HC6MODULE-DIP microcontroller (µc) module, and USBT022. Order the complete EV system (MAX68EVC6) for a comprehensive evaluation of the MAX68 using a personal computer (PC). Order the EV kit (MAX68EVKIT) separately if the 68HC6MODULE-DIP module has been purchased with a previous Maxim EV system, or for custom use in other µc-based systems. MAX68 EV System PART QTY DESCRIPTION MAX68EVKIT MAX68 EV Kit 68HC6MODULE-DIP 68HC6 µc Module USBTO22+ U S B- to- C O M P or t Ad ap ter Boar d +Denotes lead-free and RoHS compliance. MAX68 EV Kit DESIGNATION QTY DESCRIPTION C C8, C2, C22 20 C9, C20 2 C2 C2 C 8 C2 C9 8 0.µF ± 0%, 6V X7R ceramic capacitors (060) TDK C608X7RC0KT 0µF ± 20%, 6V XR ceramic capacitors (20) TDK C22XRC06M µf ± 20%, 0V XR ceramic capacitor (080) TDK C202XRA0M 00pF ceramic capacitors (060) TDK C608C0GH0J 0.22µF ± 0%, 0V X7R ceramic capacitors (060) TDK C608X7RA22K Features Proven PCB Layout Convenient On-Board Test Points Fully Assembled and Tested EV Kit Software Supports Windows 98/2000/XP with RS-22/COM Port EV Kit Software Supports Windows 2000/XP with USB Port Windows is a registered trademark of Microsoft Corp. Ordering Information PART IC PACKAGE INTERFACE TYPE MAX68EVKIT 2 QSOP User-supplied MAX68EVC6 2 QSOP Windows software Note: The MAX68 software is included with the MAX68 EV kit, but is designed for use with the complete EV system. The EV system includes a µc module, USBT022, and the EV kit. If the Windows software is not required, the EV kit board can be purchased by itself, without the µc module. Note: To evaluate the MAX068, request a free sample of the MAX068_CEG when ordering the MAX68 EV kit. Component Lists DESIGNATION QTY DESCRIPTION FB, FB2 2 Surface-mount ferrite beads (060) TDK MMZ608B60C J 2 x 20 right-angle female connector Samtec SSW S-D-RA JU 2-pin header JU2 -pin header R R8 8 00Ω ± % resistors (060) R9 R6 8.7kΩ ± % resistors (060) R7 R2 8 0Ω ± % resistors (060) TB0 2-circuit terminal block U U2 6-bit ADC (2-pin QSOP) Maxim MAX68CCEG Logic buffer (-pin SOT2) Fairchild Semiconductor NC7SZ2 U U0 8 Op amps (-pin SOT2) Maxim MAX0EUK 2 Shunts PCB: MAX68 Evaluation Kit MAX68 EV kit software, CD-ROM Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at

2 MAX68 EV Kit Files FILE NAME FUNCTION INSTALL.EXE Installs the EV kit files on your computer MAX68.EXE Application program HELPFILE.HTM MAX68 EV kit help file UNINST.INI Uninstalls the EV kit software KIT68.C6 Software loaded into the 68HC6 µc Component Suppliers SUPPLIER PHONE WEBSITE Fairchild Semiconductor TDK Corp Note: Indicate that you are using the MAX68 when contacting these component suppliers. Quick Start Recommended Equipment USB Port PC Connection Option MAX68 EV system MAX68 EV kit 68HC6MODULE-DIP µc module Three DC power supplies: +8V to +20V at 0.2A +V at 0.2A -V at 0.2A 0 to.096v analog signal source A user-supplied Windows 2000/XP PC with an available USB port USB cable (included with the USBTO22) 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 98/2000/XP operating system. Procedure The MAX68 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power until all connections are complete. ) Visit the Maxim website ( to download the latest version of the USBTO22 user guide. Follow the steps in the USBTO22 user guide Quick Start section and return to step 2 of this Quick Start section when finished. 2) Verify that jumper JU is ON, disabling DSP mode. ) Verify that jumper JU2 is connected to pins 2-, enabling an 8-bit-wide data-transfer mode. ) Carefully connect the boards by aligning the 0-pin connector of the MAX68 EV kit with the 0-pin header of the 68HC6MODULE-DIP module. Gently press them together. The two boards should be flush against one another. ) Ensure that the 68HC6MODULE-DIP module s SW switch is in the OFF position. 6) Connect the +8V to +20V power supply to the µc module s terminal block (J2), located next to the ON/OFF switch (SW) along the top edge of the µc module. Observe the polarity marked on the board. 7) Connect the +V power supply to the VDD pad (with respect to the GND pad) on the MAX68 EV kit board. 8) Connect the -V power supply to the pad (with respect to the GND pad) on the MAX68 EV kit board. 9) Connect the USBTO22 board to the 68HC6MOD- ULE-DIP module if you have not done so already. 0) The MAX68 EV kit software should have already been downloaded and installed in the USBTO22 Quick Start. ) Start the MAX68 EV kit software by clicking on its icon in the Start Programs menu. 2) Turn on the +V power supply, followed by the -V power supply. Finally, turn on the +8V to +20V power supply and move the 68HC6MODULE-DIP module s slide switch (SW) to the ON position. ) Press the OK button to automatically connect and download the KIT68.C6 file to the module. ) Apply an input signal (0 to +.096V) between AIN0 and GND. Observe the AIN0 label on the running Windows program. Recommended Equipment RS-22/COM Port PC Connection Option MAX68 EV system MAX68 EV kit 68HC6MODULE-DIP µc module USBTO22 Three DC power supplies: +8V to +20V at 0.2A +V at 0.2A -V at 0.2A 2

3 0 to.096v analog signal source A user-supplied Windows 98/2000/XP PC with an available serial (COM) port User-supplied 9-pin I/O extension cable (straightthrough female-to-male) 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 98/2000/XP operating system. Procedure The MAX68 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power until all connections are complete. ) Visit the Maxim website ( to download the latest version of the EV kit software. Save the EV kit software to a temporary folder and uncompress the file (if it is a.zip file). 2) Install the MAX68 EV kit software on your computer by running the INSTALL.EXE program. The program files are copied and icons are created for them in the Windows Start Programs menu. ) Verify that jumper JU is ON, disabling DSP mode. ) Verify that jumper JU2 is connected to pins 2-, enabling an 8-bit-wide data-transfer mode. ) Carefully connect the boards by aligning the 0-pin connector of the MAX68 EV kit with the 0-pin header of the 68HC6MODULE-DIP module. Gently press them together. The two boards should be flush against one another. 6) Ensure that the 68HC6MODULE-DIP module s SW switch is in the OFF position. 7) Connect the +8V to +20V power supply to the 68HC6MODULE-DIP module s terminal block (J2), located next to the ON/OFF switch (SW) along the top edge of the 68HC6MODULE-DIP module. Observe the polarity marked on the board. 8) Connect the +V power supply to the VDD pad (with respect to the GND pad) on the MAX68 EV kit board. 9) Connect the -V power supply to the pad (with respect to the GND pad) on the MAX68 EV kit board. 0) Connect the 9-pin serial cable from the computer s serial port to the 68HC6MODULE-DIP module s DB9 connector (J). ) Turn on the +V power supply, followed by the -V power supply. Finally, turn on the +8V to +20V power supply and move the 68HC6MODULE-DIP module s slide switch (SW) to the ON position. 2) Start the MAX68 EV kit software by clicking on its icon in the programs section within the Windows Start Programs menu. ) Press the OK button to automatically connect and download the KIT68.C6 file to the module. ) Apply an input signal (0 to +.096V) between AIN0 and GND. Observe the AIN0 label on the running Windows program. Detailed Description of Software The evaluation software s main window shown in Figure displays the voltage and code of the analog-input signals AIN0 AIN7. The software supports manual read or automatic read operations. Separate comboboxes allow quick modifications to the MAX68 s control byte. The SPI serial clock frequency is adjustable from.9mhz to khz, and the software s reference value can be changed to match the applied external reference. The provided Windows-compatible software supports SPI mode (not DSP mode) and also only supports the MAX68 EV kit when configured in 8-bit-wide data-transfer mode. Table describes all the controls on the evaluation software s main window. Detailed Description of Hardware MAX68 EV System The MAX68 EV system is a complete 8-channel, 6- bit data-acquisition system consisting of a MAX68 EV kit and a Maxim 68HC6MODULE-DIP µc module. The MAX68 EV system is used to evaluate the MAX68 8-channel, 6-bit serial ADC. See the Quick Start section for setup and operating instructions. See Table for more information on the provided Windows software. SPI is a trademark of Motorola, Inc

4 Table. Software Control Descriptions CONTROL DESCRIPTION The View menu makes the COM port (virtual COM port) debug form visible The BlockSample menu is an EV kit software feature that allows a single channel to be sampled and stored. The data block length is selectable and the data can be saved to a file. Block sampling is limited to single-channel read modes only. SCAN[:0] = 0 or modes are not supported. For multiple-channel reads, use the Read ADC button or the AutoRead checkbox. The Device menu allows the user to evaluate either the MAX68 or MAX068 The Help menu allows the user to view the help file or the software s about box The Control Byte label shows the current control byte setting in hexadecimal The CS[2:0] combobox selects the channel below: 000 CS2 CS CS0 = Channel 0 00 CS2 CS CS0 = Channel 00 CS2 CS CS0 = Channel 2 0 CS2 CS CS0 = Channel 00 CS2 CS CS0 = Channel 0 CS2 CS CS0 = Channel 0 CS2 CS CS0 = Channel 6 CS2 CS CS0 = Channel 7 The SCAN[:0] combobox selects the scan mode below: 00 SCAN SCAN0 = Single channel, no scan 0 SCAN SCAN0 = Sequentially scans channel 0 to CS[2:0] 0 SCAN SCAN0 = Sequentially scans channel to CS[2:0]; CS[2:0] SCAN SCAN0 = Scan channel CS[2:0] eight times The SEL[:0] combobox selects the reference mode below: 00 SEL SEL0 = Internal reference mode 0 SEL SEL0 = EV kit software does not support this mode 0 SEL SEL0 = EV kit software does not support this mode SEL SEL0 = External reference mode The CLK combobox selects the clock mode below: 0 EXT CLK INT CLK The SPI SCLK Frequency combobox selections are: 02:.9MHz 0: 2.0MHz... FF: khz

5 Table. Software Control Descriptions (continued) CONTROL MAX68 EV Kit The MAX68 EV kit board provides a proven layout for evaluating the MAX68 8-channel, 6-bit ADC and can be obtained separately without the 68HC6MODULE- DIP µc module for use with an existing µc. The MAX68 EV kit contains two different types of buffers. U2 is a logic buffer to limit the load capacitance that is seen by the DOUT line of the MAX68. U U0 are 6- bit accurate analog buffers connected in the unity-gain configuration. U is powered from V DD and U U0 are powered from V DD and V EE. U is powered from the µc module (J-7, J-8). A terminal block (TB0) has also been provided on the MAX68 EV kit board for evaluating external reference mode. Refer to the MAX67/MAX68 or MAX067/ MAX068 data sheets to ensure all interface timing specifications are met. The MAX68 and MAX68 EV kit board support DSP and 6-bit-wide data-transfer mode. Jumpers JU and JU2 can be configured for these modes; however, the supplied EV kit Windows-compatible software does not support these two modes. Please refer to the MAX67/MAX68 or MAX067/MAX068 data sheets for more information. DESCRIPTION The Se t Vr e f b utton al l ow s the user to sp eci fy the actual r efer ence vol tag e. The eval uati on softw ar e assum es a +.096V r efer ence vol tag e, unl ess other w i se sp eci fi ed. To over r i d e the d efaul t +.096V softw ar e r efer ence val ue, m easur e the actual r efer ence vol tag e at the ter m i nal b l ock ( TB0) on the M AX 68 E V ki t b oar d and enter the new r efer ence vol tag e, w i thout the vol t uni t. Fi nal l y, p r ess the Se t Vr e f b utton. The E V ki t softw ar e uses the val ue typ ed i n the V r ef fi el d to tr ansl ate the d i g i tal cod e to a vol tag e. Pressing the Read ADC button performs the conversion(s) specified by the control byte and reads back the result(s). Checking the AutoRead checkbox performs the conversion(s) specified by the control byte and reads back the result(s) every 00ms. A blinking asterisk indicates AutoRead is active. The Exit button closes the program Table 2. DSP Frame Sync Receive Input (DSPR) JUMPER JU SHUNT POSITION ON* OFF *Default configuration. DESCRIPTION DSP mode disable DSP mode enable (the supplied Windows software does not support this mode) Table. Data Bit Transfer Select Input (DSEL) JUMPER SHUNT POSITION DESCRIPTION 6-bit-wide data-transfer mode 2 (the supplied Windows software JU2 does not support this mode) 2 * 8-bit-wide data-transfer mode *Default configuration. Caution: Do not connect an external controller to the DSEL pad while a shunt is on jumper JU2.

6 Figure. MAX68 Evaluation Software s Main Window 6

7 AIN0 AIN AIN2 AIN AIN AIN AIN6 AIN7 R7 0Ω C2 R8 0Ω C R9 0Ω C R20 0Ω C R2 0Ω C6 R22 0Ω C7 R2 0Ω C8 R2 0Ω C9 R9.7kΩ R0.7kΩ R.7kΩ R2.7kΩ R.7kΩ R.7kΩ R.7kΩ R6.7kΩ AVDD C U MAX0 C2 AVDD C U MAX0 C6 AVDD C9 U7 MAX0 C0 AVDD C U9 MAX0 C AVDD C U MAX0 C AVDD C7 U6 MAX0 C8 AVDD C U8 MAX0 C2 AVDD C U0 MAX0 C6 R 00Ω R2 00Ω R 00Ω R 00Ω R 00Ω R6 00Ω R7 00Ω R8 00Ω C9 0μF C2 00pF C2 00pF C26 00pF C27 00pF C28 00pF C29 00pF C0 00pF C 00pF AVDD DVDD J C AIN0 AVDD DVDD MAX68 C8 C20 0μF JU2 AVDD JU 2 DSPR DESL EOC DSPX SCLK DIN DOUT CS UCVDD J J 2 J J J J 6 J 7 J 8 J 9 J 0 J J 2 J J J 7 J 6 J 8 J J 0 J 9 J J J 2 J J 0 J 29 J 28 J 27 J 26 J 2 J 2 J 2 J 22 J 2 2 A DE TB TP TP 2 DVDD 2 x 20 RIGHT ANGLE FEMALE CONNECTOR AIN AIN2 AIN AIN FB U DSPR DSEL EOC DSPX SCLK DIN DOUT CS J J 6 J 7 J 20 J 9 J 8 TP CS TP SCLK TP DIN TP 6 DOUT U2 NC7SZ2 VCC UCVDD C22 AIN AIN6 REF REFCAP 6 TB0 C2 μf TB0 2 C2 TERMINAL BLOCK TB0 GND Y 2 N.C. AIN7 GND AGND AGND DGND FB2 Figure 2. MAX68 EV Kit Schematic 7

8 Figure. MAX68 EV Kit Component Placement Guide Component Side 8

9 Figure. MAX68 EV Kit PCB Layout Component Side 9

10 Figure. MAX68 EV Kit PCB Layout Inner Layer 2 (GND) 0

11 Figure 6. MAX68 EV Kit PCB Layout Inner Layer (VDD)

12 Figure 7. MAX68 EV Kit PCB Layout Solder Side Revision History Pages changed at Rev :, 8 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. 2 Maxim Integrated Products, 20 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.