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1 -708; Rev 0; /0 eneral Description The MX655 evaluation kit (EV kit) is designed to evaluate the MX655 light-emitting diode (LED) display driver with a -wire interface. The EV kit board contains two MX655 LED display drivers on symmetrical sides of the board, allowing a 6-digit display using sixteen 4- segment alphanumeric LEDs. The DB-5 connector allows a PC s parallel (printer) port to provide the -wire interface. The Windows software provides a friendly graphical user interface (U) to exercise the features of the MX655 by allowing on-the-fly text and numeric entry and access to all relevant registers. The software includes multiple tabs for accessing the various registers and maintains a consistent format with controls on the left side of the software s main window pertaining to U, located on the left side of the EV kit board. Similarly, all the controls on the right side of the software s main window pertain to U, located on the right side of the EV kit board. The EV kit board requires a.vdc or 5VDC power supply and jumpers JU JU4 allow the user to manually modify the device address of U or U. Order the MX655EVKT for comprehensive evaluation of the MX655 using a PC with an available parallel port. eatures Proven PC Board Layout Windows 5/8/ME/NT/000/XP-Compatible Evaluation Software -Wire Serial nterface Sixteen 4-Segment Bright LEDs ully ssembled and Tested Ordering nformation PRT TEMP RNE C PCKE MX655EVKT 0 C to +70 C 6 SSOP MX655 EV Kit iles PRORM DESCRPTON NSTLL.EXE nstalls the EV kit software MX655.EXE pplication program HELPLE.HTM MX655 EV kit Helpfile PORT5NT.EXE SST's freeware DLPortO driver package UNNST.N Uninstalls the EV kit software DESNTON QTY DESCRPTON C µ ±0%, 6.V X5R ceramic capacitor (0) TDK C5X5R0J6M Component List DESNTON QTY DESCRPTON J Male DB-5 right-angle plug J, J 0-pin dual-row x 0 headers JU JU4 4 5-pin headers C p ±5%, 50V CO ceramic capacitor (060) TDK C608COH0JT N, N N-channel MOSETs (-pin SOT), top mark: 70 Central Semiconductor N700 C, C5 0.µ ±0%, 5V X7R ceramic capacitors (060) TDK C608X7RE04KT Q, Q Bipolar junction transistors (-pin SOT), top mark: C Central Semiconductor CMPT04 C4, C6 D D8 8 D D 4 µ ±0%, 0V X5R ceramic capacitors (0805) TDK C0X5R05M 0.54in dual 4-segment alphanumeric LEDs Lumex LDD-5406R airchild MD640C Zener diodes, Vz = 5.V (-pin SOT), top mark: KZ or Z Diodes nc. BZX84C5V R, R5 00kΩ ±5% resistors (06) R, R6 kω ±5% resistors (06) R, R4, R7 R0, R R 6 ±5% resistors (06) R, R 00kΩ ±% resistors (06) U, U MX655X (6-pin SSOP) None 4 Shunts Windows is a registered trademark of Microsoft Corp. Maxim ntegrated Products or pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at

2 Component Suppliers SUPPLER PHONE WEBSTE Central Semiconductor Diodes nc airchild Semiconductor Lumex, nc Scientific Software Tools, nc TDK w w w.com p onent.td k.com Quick Start Recommended Equipment Before beginning, the following equipment is needed: MX655EVKT.VDC or 5VDC power supply PC with Windows 5/8/ME/NT/000/XP n available parallel port (female DB-5 connector on back of PC) standard 5-pin, straight-through, male-to-female cable to connect the PC s parallel port to the MX655 EV kit board Procedure ) Connect a cable from the PC s parallel port to the MX655 EV kit board. Use a 5-pin, straightthrough, female-to-male cable. ) nstall the supplied CD into the CD drive of your PC and run NSTLL.EXE. When the installer window shows up on the screen, press the NSTLL button. The MX655 program files are copied and icons are created in the Programs section within the Start menu. When you see the self-extracting DLPortO driver install window appear on the screen, press the Yes button. This automatically unpacks the compressed files and runs the DLPortO driver installer. f using Windows NT, 000, or XP, you must have administrator privileges on your PC. f you do not, then contact your system administrator to allow installation. You need to restart your PC after installing the DLPortO driver. ) Connect a.vdc or 5VDC power supply between the and ND pads on the MX655 EV kit board. 4) Start the MX655 EV kit program by double clicking its icon located in the Programs section within the Start menu. 5) The program automatically detects the MX655 EV kit board and displays -wire Hardware Detected in a green font. 6) The MX655 EV kit board and MX655 EV kit software should automatically display MX655 EVKT. Software Description The EV kit software s main window, shown in igure, allows on-the-fly text and numeric entry and also allows access to all the relevant registers for easy configuration. The controls on the left side of the software s main window control U and similarly, the controls on the right side of the software s main window control U. Each register has its own tab in the order of the MX655 s address map. -wire operation field is present at the very bottom of the software s main window, which shows the results of the last -wire operation. lphanumeric Entry for U n the upper left-hand corner of the software s main window is the lphanumeric Entry for U group box. This group box has five main controls: Plane group box U ddress (write) combo box U ddress (read) combo box lphanumeric entry field Decimal Point checkbox and individual decimal point checkboxes The first control is the Plane group box, which allows the user to select which plane to write to. The radio button choices in the Plane group box are P0 and P, P0, and P. t is important to note that once one of these plane radio buttons is selected, the software automatically takes the text or numbers that exist in the lphanumeric Entry field and writes them to the display. The second and third controls are the U ddress (write) and the U ddress (read) combo boxes. These device-address combo boxes default to 0xC for write and 0xCB for read. f you modify the default device address, change the jumper settings on JU and JU on the MX655 EV kit board. f the default address settings are changed on the board, the user must also manually select the correct device address

3 igure. MX655 EV Kit Software s Main Window in the U ddress (write) and the U ddress (read) combo boxes. Table lists the device address selection for the various JU and JU jumper settings. The fourth control is the lphanumeric Entry field, which displays MX655 at the start of the program. The user may type letters, numbers, apostrophes, commas, or even spaces in the lphanumeric Entry field using the computer s keyboard. The lphanumeric Entry field also supports standard word processing features like highlighting, insert, and delete. nytime an invalid character is typed into the lphanumeric Entry field, such as a character error message box pops up, indicating an invalid character was typed. nytime a valid character is typed into the lphanumeric Entry field, the software automatically writes it to the corresponding digit on the display. The last control type within the lphanumeric Entry for U group box is the Decimal Point checkbox and the individual decimal point checkboxes. When the Decimal Point checkbox is checked, all of the individual decimal point checkboxes become visible. When the Decimal Point checkbox is unchecked, all of the individual decimal point checkboxes are hidden. Checking one of the individual decimal point checkboxes automatically lights up the corresponding decimal point on the board.

4 lphanumeric Entry for U The lphanumeric Entry for U group box is in the upper right-hand corner of the software s main window. This group box has five main controls: Plane group box U ddress (write) combo box U ddress (read) combo box lphanumeric Entry ield Decimal Point checkbox and individual decimal point checkboxes The first control is the Plane group box, which allows the user to select which plane to write to. The radio button choices in the Plane group box are P0 and P, P0, and P. t is important to note that once one of these plane radio buttons is selected, the software automatically takes the text or numbers that exist in the lphanumeric Entry field and writes them to the display. The second and third controls are the U ddress (write) and the U ddress (read) combo boxes. These device address combo boxes default to 0xC0 for write and 0xC for read. f you modify the default device address, change the jumper settings on JU and JU4 on the MX655 EV kit board. f the default address settings are changed on the board, the user must also manually select the correct device address in the U ddress (write) and the U ddress (read) combo boxes. Table lists the device address selection for the various JU and JU4 jumper settings. The fourth control is the lphanumeric Entry field, which displays EVKT at the start of the program. The user may type letters, numbers, apostrophes, commas, or even spaces in the lphanumeric Entry field using the computer s keyboard. The lphanumeric Entry field also supports standard word processing features like highlighting, insert, and delete. nytime an invalid character is typed into the lphanumeric Entry field, such as a character error message box pops up, indicating an invalid character was typed. nytime a valid character is typed into the lphanumeric Entry field, the software automatically writes it to the corresponding digit on the display. The last control type within the lphanumeric Entry for U group box is the Decimal Point checkbox and the individual decimal point checkboxes. When the Decimal Point checkbox is checked, all of the individual decimal point checkboxes become visible. When the Decimal Point checkbox is unchecked, all of the individual decimal point checkboxes are hidden. Checking one of the individual decimal point checkboxes automatically lights up the corresponding decimal point on the board. Register Tabs The MX655 EV kit software has 4 register tabs for both U and U, giving access to 86 unique registers. ny register tab can be selected by a mouse click when visible and not all register tabs can be visible at once. Scroll through the register tabs using the left and right scroll arrows located on the right-hand side of the software s main window. The order of the register tabs corresponds to the same order of the MX655 s address map. Refer to the MX655 C data sheet for details on the address map and a complete description of each register. Keyboard Navigation When you type on the keyboard, the system must know which control should receive the keys. Press the tab key to move the keyboard s focus from one control to the next. The focused control is indicated by a dotted outline. Shift + tab moves the focus to the previously focused control. Buttons respond to the keyboard s space bar. Some controls respond to the keyboard s up and down arrow keys. ctivate the program s menu bar by pressing the 0 key, then press the letter of the menu item you want. Most menu items have one letter underlined, indicating their shortcut key. Hardware Description The MX655 EV kit board is designed symmetrically so that the left side of the board pertains to U and the right side of the board pertains to U. Thus, the first eight digits are driven by U and the last eight digits are driven by U. n OSC pad for U is provided for external clock operation and an OSC_OUT pad for U is also provided for cascading additional MX655 devices. The DB-5 connector and associated circuitry are only needed for obtaining the -wire interface from the PC s parallel port and are not needed in typical applications. Connect the DB-5 connector, J, to the PC s parallel port using a 5-pin straight-through, female-to-male cable. our jumpers are on the EV kit board to modify the device address for U and U. The two dual-row 0-pin headers, J and J, are used for the /O expander and keyscan features of U and U, respectively. Device ddress Jumpers JU JU4 The MX655 EV kit board contains four jumpers in the top right-hand corner of the board. Jumpers JU and 4

5 JU select the device address for U and jumpers JU and JU4 select the device address for U. Table lists the device address selection for the various JU and JU jumper settings. Table lists the device address selection for the various JU and JU4 jumper settings. Before changing the default device address for U or U, read the lphanumeric Entry for U and lphanumeric Entry for U sections pertaining to required modifications for the ddress (write) and ddress (read) combo boxes. OSC and OSC_OUT Pads n OSC pad for U is provided for external clock operation and an OSC_OUT pad for U is also provided for cascading additional MX655 devices. When the OSC pad is unconnected, the internal oscillator of U Table. U ddress Selection for Jumpers JU and JU JUMPER POSTON DEVCE DDRESS JU JU (Write) (Read) - - 0xDE 0xD - - 0xD 0xDB -4-0xDC 0xDD -5-0xD8 0xD - - 0xCE 0xC -* -* 0xC* 0xCB* -4-0xCC 0xCD -5-0xC8 0xC xD6 0xD xD 0xD xD4 0xD xD0 0xD xC6 0xC xC 0xC xC4 0xC xC0 0xC *Default for U. drives both U and U because OSC_OUT of U is directly connected to OSC of U with a trace on the board. t is also possible to drive the OSC pad of U with an external clock between MHz to 8MHz.,, and ND Pads The MX655 EV kit utilizes the PC s parallel port to generate a -wire interface for easy evaluation. Customers who wish to evaluate U and U using their own -wire interface must remove the parallel port cable from the board and attach the new -wire interface to the,, and ND pads located on the upper left-hand side of the MX655 EV kit board. The,, and ND pads are also useful for probing the -wire waveforms with a digital oscilloscope or logic analyzer. Table. U ddress Selection for Jumpers JU and JU4 JUMPER POSTON DEVCE DDRESS JU JU4 (Write) (Read) - - 0xDE 0xD - - 0xD 0xDB -4-0xDC 0xDD -5-0xD8 0xD - - 0xCE 0xC - - 0xC 0xCB -4-0xCC 0xCD -5-0xC8 0xC xD6 0xD xD 0xD xD4 0xD xD0 0xD xC6 0xC xC 0xC xC4 0xC5-5* -5* 0xC0* 0xC* *Default for U. 5

6 J- N.C. J-4 N.C. J-6 N.C. J-7 N.C. J-8 N.C. J- N.C. J-4 N.C. J-6 N.C. J-7 N.C. J-8 J- J-0 J- J- J- J-4 J-5 J- J- J-5 J- J- J- J-0 J-5 R 00kΩ D0 R5 00kΩ D D D R kω N R6 kω N R R7 R R0 R4 R8 Q Q ND BLNK BLNK OSC OSC_OUT BLNK P0 P P P P C p OSC_OUT V+ 0 OSC V+ 4 D0 5 BLNK P0 P 4 P 5 P 6 P JU 4 JU U MX655 4 SET 5 5 ND ND D0 D C 0.µ R 00kΩ % D0 D C4.0µ SEMENT DUL DT E 8 M 7 CC_ 6 5 D J DP LUMEX CC_ 0 C LDD-5406R B 4-SEMENT DUL DT E 8 M 7 CC_ 6 5 D J DP LUMEX CC_ 0 C LDD-5406R B 4-SEMENT DUL DT E 8 M 7 CC_ 6 5 D J DP LUMEX CC_ 0 C LDD-5406R B 4-SEMENT DUL DT E 8 M 7 CC_ 6 5 D4 J DP LUMEX CC_ 0 C LDD-5406R B D igure. MX655 Schematic (Sheet of ) 6

7 ND JU 4 D0B JU4 4 DB C µ 5 5 OSC_OUT OSC_OUT BLNK P0_B P_B P_B P_B P4_B B B B B4 B5 B6 B7 B8 B B0 OSC_OUT V+ 0 OSC V+ 4 U MX655 SET 7 5 BLNK P0 P 4 P 5 P 6 P ND ND D0 D C5 0.µ R 00kΩ % D0B DB B B8 B7 B6 B5 B4 B B B C6.0µ B B8 B7 B6 B B7 B B6 4-SEMENT DUL DT E 8 M 7 CC_ 6 5 D5 J DP LUMEX CC_ 0 C LDD-5406R B B0 B B B4 B5 B B B B5 B B8 B7 B6 B B7 B B6 4-SEMENT DUL DT E 8 M DP C D6 LUMEX LDD-5406R CC_ J CC_ B B0 B B B4 B5 B B B4 B5 B B8 B7 B6 B B7 B B4 4-SEMENT DUL DT E 8 M DP C D7 LUMEX LDD-5406R CC_ J CC_ B B0 B B5 B4 B5 B B B6 B B B8 B7 B6 B B5 B B4 4-SEMENT DUL DT E 8 M DP C D8 LUMEX LDD-5406R CC_ J CC_ B B0 B B7 B4 B5 B B B8 B igure. MX655 Schematic (Sheet of ) 7

8 J- N.C. J- N.C. J- N.C. J-4 N.C. J-5 J-6 J-7 J-8 J- J-0 J- J- J- J-4 J-5 J-6 J-7 J-8 J- J-0 P0 P P P P J- J- J- J-4 J-5 J-6 J-7 J-8 J- J-0 J- J- J- J-4 J-5 J-6 J-7 N.C. J-8 N.C. J- N.C. J-0 N.C. B8 B7 B6 B5 B4 B B B P4_B P_B P_B P_B P0_B P0 P P P P4 P0_B P_B P_B P_B P4_B R R4 R5 R6 R7 R8 R R0 R R igure. MX655 Schematic (Sheet of ) 8

9 igure. MX655 EV Kit Component Placement uide Component Side

10 igure 4. MX655 EV Kit PC Board Layout Component Side 0

11 igure 5. MX655 EV Kit PC Board Layout Solder Side

12 igure 6. MX655 EV Kit Component Placement uide 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. Maxim ntegrated Products, 0 San abriel Drive, Sunnyvale, C Maxim ntegrated Products Printed US is a registered trademark of Maxim ntegrated Products.