View MAX6952EVKIT_305187.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-2344; Rev 1; 8/02
MAX6952 Evaluation Kit
General Description
The MAX6952 evaluation kit (EV kit) is an assembled and tested PC board that demonstrates the MAX6952 SPITM-interfaced four-digit 5 x 7 matrix LED display driver. Two cascaded MAX6952s are used to drive eight 5 x 7 monocolor matrix displays. The EV kit is powered by a user-supplied 2.7VDC to 5.5VDC power supply. The SPI-compatible serial interface is connected to an IBM- compatible PC parallel port for easy evaluation. The EV kit can be reconfigured for interfacing to a user's microcontroller for standalone operation. Windows(R) 95/98/2000-compatible software provides a user-friendly interface to demonstrate the features of the MAX6952 IC. The program is menu driven and offers a graphic interface with control buttons.
Features
o 8-Character Red 5 x 7 Matrix Cathode-Row Display o SPI-Compatible Serial Interface o Operates from a 2.7V to 5.5V Supply Range o Reconfigurable for Standalone Operation with an External Microcontroller o Easy-to-Use Menu-Driven Software o Windows 95/98/2000-Compatible Software o Fully Assembled and Tested
Evaluates: MAX6952
Ordering Information
PART MAX6952EVKIT TEMP RANGE 0C to +70C IC PACKAGE 36 SSOP
Component List
DESIGNATION C1, C7, C9 QTY 3 DESCRIPTION 47F, 6.3V low-ESR POSCAPs (C) Sanyo 6TPA47M 1F 20%, 10V X7R ceramic capacitor (0805) Taiyo Yuden LMK212BJ105MG 0.1F 10%, 16V X7R ceramic capacitors (0603) Murata GRM39X7R104K016AD Red 0.7in 5 x 7 LED dot-matrix, cathode-row displays Fairchild GMC7175CA 200mA, 25V Schottky diodes (SOT23) Fairchild BAT54C 200mA, 75V ultra-fast diode (SOD-123) Fairchild MMSD4148 DB-25 male right-angle connector 6-pin header 3-pin header 10k 5% resistors (0805) DESIGNATION R5, R6 R7 R8 EXT_CLK U1, U2 U3 U4, U6 U5 D1-D8 8 QTY 2 1 1 1 2 1 2 1 DESCRIPTION 61.9k 1% resistors (0805) 1M 5% resistor (0805) 680 5% resistor (0805) BNC connector MAX6952EAX (36-pin SSOPs) MAX1841EUB (10-pin MAX) MAX3370EXK (5-pin SC70s) Unbuffered hex inverter (14-pin SO) TI SN74HCU04D 4MHz ceramic resonator with capacitors Murata CSTCR4M00G53-R0 Shunt (JU9) MAX6952 PC board MAX6952 data sheet MAX6952 EV kit data sheet 3.5in software diskette, MAX6952 EV KIT
C2
1
C3-C6, C8, C10
6
Y1 None None None None None
1 1 1 1 1 1
D9, D10
2
D11 J1 J2 JU9 R1-R4, R9, R10
1 1 1 1 6
Windows is a registered trademark of Microsoft Corp. SPI is a trademark of Motorola, Inc. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX6952 Evaluation Kit Evaluates: MAX6952
Component Suppliers
SUPPLIER Fairchild Murata Sanyo Taiyo Yuden TDK PHONE 888-522-5372 770-436-1300 619-661-6835 800-348-2496 847-803-6100 FAX Contact Local Office 770-436-3030 619-661-1055 847-925-0899 847-390-4405 WEBSITE www.fairchildsemi.com www.murata.com www.sanyovideo.com www.t-yuden.com www.component.tdk.com
Note: Please indicate that you are using the MAX6952 when contacting these manufacturers.
Quick Start
Required Equipment
Before beginning, the following equipment is needed: * Compatible PC running Windows 95/98/2000 * Parallel printer port LPT1, LPT2, or LPT3 (25-pin female socket) * Standard 25-pin, straight-through, male-to-female cable (6ft maximum printer extension cable) to connect the computer's parallel port to the MAX6952 EV kit * DC power supply capable of supplying between 2.7V and 5.5V and at least 500mA of current
MAX3370 level translators, respectively. Both signal locations can be used for monitoring. Note: An uninstall program is included with the software. Click on the UNINSTALL icon to remove the EV kit software from the hard drive.
Detailed Description of Software
Note: Words in boldface are user-selectable features in the software.
Procedure
Do not turn on the power until all connections are made. 1) Connect the computer's parallel port to the MAX6952 EV kit. Use a straight-through 25-pin female-to-male cable. The EV kit software uses a loopback connection to confirm that the correct port has been selected. 2) Use the INSTALL.EXE program to install the files and create icons for them in the Windows 95/98/2000 Start menu. For Windows 2000, check to confirm that you have the required administrator privilege. 3) Turn on the power supply and set it to 5V and turn it off. 4) Connect the power-supply positive terminal to the V CC pad and negative terminal to the GND pad. Turn on the power supply. 5) Start the MAX6952 program by opening its icon in the Start menu. 6) Observe as the program automatically detects the parallel port address of the MAX6952 EV kit and starts the main program. 7) Header J2 is provided to monitor the parallel port pins supplying the CLK_P, CS_P, DIN_P, DOUT_P (5V signals), and loopback signals. The CS, DIN, CLK, DOUT, and BLINK pads on the EV kit's left side are VCC level-shifted signals from the MAX1841 and
2
Software Startup
A mouse or the Tab key is used to navigate between items on the Main display window. Upon starting the program, the MAX6952 EV kit display is programmed to initialize in Normal mode, display eight digits, blink at the Slow Rate with an 8/16 (50% duty cycle) display intensity, and display the contents of the initialized MAX6952 SRAM Plane P0 and P1 contents. The User RAM characters are blank. The MAX6952 EV kit eightdigit 5 x 7 matrix LED display should alternate between MAX6952 and ->EV KIT. The number of digits displayed is fixed at eight digits, four digits per MAX6952.
Main Window Display Controls
The Display Mode radio buttons determine the mode of operation of the MAX6952 EV kit. Clicking on the Shutdown radio button puts the MAX6952 drivers into shutdown mode. The display is blank and the EV kit draws the least amount of current in this mode. Selecting the Normal radio button places the MAX6952 EV kit in the normal mode of operation. The Test radio button puts the MAX6952 EV kit in test mode. All eight digits of the 5 x 7 LED matrix display on the MAX6952 EV kit are illuminated with a 50% duty cycle (8/16).
_______________________________________________________________________________________
MAX6952 Evaluation Kit Evaluates: MAX6952
Figure 1. MAX6952 Evaluation Software's Main Window Controls the Display, Intensity, Blink Rate, and Character Code of Each 5 x 7 LED Matrix Digit
Figure 2. MAX6952 Evaluation Software User RAM Window Determines the Shape of the 24 User-Definable Characters
To change the blink rate, click on one of the Blink Rate radio buttons. Once selected, the Blink Rate can be adjusted by using the up-down arrows on the keyboard. The red ON caption on the left side of each plane indicates which plane is currently displayed on
the EV kit hardware. Intensity of the MAX6952 EV kit LEDs can be adjusted by using the mouse to move the Intensity Control track bar. Once selected, the Intensity Control can be adjusted with the left-right arrows on the keyboard.
_______________________________________________________________________________________
3
MAX6952 Evaluation Kit Evaluates: MAX6952
Both SRAM Data Planes P0 and P1 are displayed on the computer monitor eight-digit 5 x 7 LED matrix and are updated when a new hexadecimal digit value is entered above the digit in the edit box. The program keeps track of data written to all registers in the MAX6952 hardware. To clear the MAX6952 P0 and P1 Plane registers, click on the Clear Planes button and both planes are set to the blank ASCII character, hexadecimal value 20. Note that the EV kit is still in Normal display mode although all of the 5 x 7 LED matrix segments are off. Figure 1 shows the evaluation software's Main window. user-definable characters data, and sends them to the MAX6952 EV kit hardware. The Main window and User RAM window are also restored to the saved condition.
User RAM Interface
Clicking on the User RAM button brings up the User RAM display window (Figure 2), allowing the user to configure all 24 user-definable characters RAM00- RAM23. Clicking on the desired digit's dot illuminates the segment and automatically updates both MAX6952's user RAM in the EV kit with the new pattern for that particular character. Entering the hexadecimal value of a user-defined character in the Main window's plane P0 or P1 edit box displays the user-defined character. For example, entering 00 displays the character designed at RAM00 in the user RAM window. The EV kit's appropriate digit is also updated with the character. To clear all 24 user-definable characters RAM00- RAM23, use the Clear All User RAM button. User RAM in both MAX6952s on the EV kit is cleared. Clicking the Exit User RAM button closes the User RAM display window.
Pulldown Menus and Saving Data
All available functions, except for altering a digit's value, can be changed using the Pulldown menus. A reset function is also provided in the View|Reset menu to reinitialize the program and hardware.* Pressing the Save Data button saves all the current registers, P0 and P1 planes, and user-definable character data to the MAX6952.ini file. The Restore Data button retrieves the saved registers, P0 and P1 planes,
General-Purpose SPI Utility
There are two methods for communicating with the MAX6952: through the Main window display or through the general-purpose SPI utility using the View|SPI Utility command. The utility configures the SPI parameters such as clock polarity (CPOL), clock phase (CPHA), and chip select (CS) polarity. The fields where pin numbers are required apply to the pins of the parallel port connector. When using the SPI utility, the Main window display no longer keeps track of changes sent to hardware. The SPI utility is preconfigured for the proper setting of CPOL, CPHA, and CS. The EV kit and PC program can be reinitialized to the startup screen settings by using the View|Reset EV kit command. The utility handles data as 8-bit hexadecimal bytes. Data longer than 1 byte must be handled as multiple bytes. Thus, for the MAX6952 EV kit, 16-bit words are broken into two 8-bit bytes: 1) Click on the Bit-Banging Serial Interface tab and set bits per byte to 8 (Figure 3). 2) Enter the command byte first and then the data byte. 3) To write data to the MAX6952 EV kit hardware, enter the data into the Data bytes to be written field. The data bytes must be hexadecimal and prefixed by 0x. 4) Separate each byte with a comma.
Figure 3. Parallel Port Diagnostic Window's Bit-Banging Serial Interface Tab Provides Direct, Low-Level Access to the MAX6952 Through the SPI Interface *Active and inactive dot colors can be changed using the View|Reset Matrix color menu. 4
_______________________________________________________________________________________
MAX6952 Evaluation Kit
2.7V TO 5.5V POWER SUPPLY
MAX6952 EV KIT
VCC 5V MAX3370 MAX1841
PC PARALLEL PORT
MAX6952
MAX6952
EIGHT 5 x 7 MATRIX DIGITS
5) Press the Send Now button to write the data to the MAX6952 EV kit. For example, to set the MAX6952 EV kit's display intensity to 2/16 for digits 1, 2, 5, and 6, enter the command word 0x01 and data word 0x11 as: 0x01,0x11, 0x01,0x11 and click the Send Now button. Multiple commands and data sets must be sent to the EV kit since two MAX6952 ICs are serially cascaded. Setting the repeat to 2 automatically accomplishes this. Data received from the MAX6952 ICs is displayed under the Data Bytes received.
Evaluates: MAX6952
VCC VOLTAGE SIDE
5V SIDE
Detailed Description of Hardware
The MAX6952 EV kit demonstrates two MAX6952 fourdigit 5 x 7 LED matrix display drivers cascaded together driving eight red LED 5 x 7 matrix displays. The red
Figure 4. MAX6952 EV Kit Level-Translation Block Diagram
Table 1. Standalone Mode
JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JUMPER, PC BOARD TRACE Cut open Cut open Cut open Cut open Cut open Cut open Cut open Cut open JUMPER FUNCTION U6 level-translator BLINK signal isolated from EV kit U3 level-translator CLK signal isolated from EV kit U3 level-translator CS signal isolated from EV kit U3 level-translator DIN signal isolated from EV kit U3 level-translator VCC pin isolated U4 level-translator DOUT signal isolated from EV kit U4 level-translator VCC pin isolated U6 level-translator VCC pin isolated EV KIT MODE Standalone, external controller connected to BLINK pad Standalone, external controller connected to CLK pad Standalone, external controller connected to CS pad Standalone, external controller connected to DIN pad U3 power disconnected Standalone, external controller connected to DOUT pad U4 power disconnected U6 power disconnected
Table 2. PC/Software Control Mode
JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JUMPER, PC BOARD TRACE Shorted Shorted Shorted Shorted Shorted Shorted Shorted Shorted JUMPER FUNCTION U6 level translator provides BLINK signal U3 level translator provides CLK signal U3 level translator provides CS signal U3 level translator provides DIN signal U3 level translator powered from VCC rail U4 level translator provides DOUT signal U4 level translator powered from VCC rail U6 level translator powered from VCC rail EV KIT MODE PC/software control through parallel port PC/software control through parallel port PC/software control through parallel port PC/software control through parallel port U3 power connected PC/software control through parallel port U4 power connected U6 power connected
_______________________________________________________________________________________
5
MAX6952 Evaluation Kit Evaluates: MAX6952
5 x 7 LED matrix displays are cathode-row type. The user must provide the EV kit with a DC power supply capable of supplying between 2.7V and 5.5V and capable of providing at least 500mA. The EV kit connects to a compatible PC parallel port to control the EV kit. The EV kit's SPI-compatible serial interface is connected to a MAX1841 (U3) and two MAX3370 (U4, U6) level translators. The translators level shift the computer's parallel port logic 5V signals to the EV kit's logic VCC voltage level chosen by the user. The translators can function with voltages down to 2.7V. The level translators' parallel port side is powered by the parallel port's D5-D7 data pins, diodes D9/D10, and capacitor C2, which provides approximately 5V to the translators' power input. The power supply connected to VCC provides power to the translators' outputs. A 6-pin header (J2) is provided for monitoring the 5V CLK_P, CS_P, DIN_P, DOUT_P non-level-translated and loopback signals coming from the parallel port cable. The EV kit can be reconfigured for standalone operation and connected to an external microcontroller for evaluation. Pullup resistors R1-R4 and R10 are provided on the EV kit for the MAX6952's CLK, CS, DIN, DOUT, and BLINK pins. PC board pads are provided for interfacing or monitoring the CLK, CS, DIN, DOUT, and BLINK level-translated pins of the MAX6952 ICs. The MAX6952 ICs are configured for an external 4MHz oscillator provided by IC U5, ceramic resonator (Y1), and resistors R8 and R7. Resistor R7 provides positive feedback to the inverter's input (U5-A) and damping resistor R8 provides attenuated coupling between the feedback circuit and inverter. Inverters U5-B and U5-C provide buffering and sharpen the clock signal. The EV kit can be reconfigured for evaluating other frequencies by applying an external TTL/CMOS-compatible clock to BNC connector EXT_CLK and reconfiguring jumper JU9. The external clock's frequency range should be within 1MHz to 8MHz. Both MAX6952's (U1, U2) blink signals can be monitored with an oscilloscope at test points TP1 and TP2, respectively. Each MAX6952's peak segment current is set to 30mA by resistors R5 and R6 for U1 and U2, respectively. The parallel port signals are level translated and buffered from the EV kit by the level translators. However, the two sides are not galvanically isolated. Figure 4 shows the parallel port and level-translation interface for the MAX6952 EV kit.
Jumper Selection
Standalone Configuration The MAX6952 EV kit features several jumpers (JU1- JU8) to reconfigure the EV kit for standalone operation mode or PC/software control mode. Tables 1 and 2 list the jumpers to cut open or short for the desired evaluation mode. Note: All jumpers must be configured for only one mode at a time. A suitable voltage must be selected for standalone mode. Configure all jumpers for either standalone or PC/software control mode. Evaluating Other Oscillator Frequencies The MAX6952 EV kit features a jumper to select the multiplex clock source. The MAX6952 EV kit is configured to be driven at 4MHz by an external oscillator formed by ceramic resonator Y1, resistors R7/R8, and inverter U5. The user can connect an external TTL/CMOS clock oscillator to the EXT_CLK pad to evaluate other frequencies (1MHz (min) to 8MHz (max)). The 3-pin jumper JU9 selects the source for the MAX6952 multiplex clock. Table 3 lists the various jumper options.
Troubleshooting
Problem: Cannot find MAX6952 EV kit parallel port connection. Ensure that the I/O extension cable is connected to a parallel port, and not a SCSI or other type of port. Verify that the supplied LPTCON.VXD is in the same directory as MAX6952.EXE. If a local printer driver is installed, temporarily disable it. The software does not work if the program icon is dragged onto the windows desktop; instead, install the software using the install program.
Table 3. Jumper JU9 Functions
SHUNT LOCATION 1 and 2 OSCILLATOR SOURCE Inverter U5-C EXT_CLK pad, D11, and U5-F provide VCC level clock OSCILLATOR FREQUENCY 4MHz, set by EV kit oscillator External TTL/CMOS clock range (1MHz to 8MHz) for the external oscillator
2 and 3
6
_______________________________________________________________________________________
MAX6952 Evaluation Kit Evaluates: MAX6952
EXT_CLK 1 BNC 2 13 C10 0.1F U5-A 1 14 3 7 R7 1M DVCC R8 680 3 5V CC U6 MAX3370 VCC VCC GND C1 47F BLINK_P 4 IO_VCC I/O_VL 3 JU1 2 GND 2 R10 10k BLINK BLINK VL 1 VCC U5-B 4 5 U5-C 6 VCC
VCC
U5-E U5-F 12 3 2 1 U5-D JU9 9 8 MUX_CLK2 11 10 MUX_CLK1
R9 10k
D11
JU8
Y1 1
Figure 5. MAX6952 EV Kit Schematic (Sheet 1 of 4)
J1-6 J1-1 J1-11 J1-7 J1-8 J1-14 J1-15 J1-9 J1-25 J1-24 DB-25 MALE CONNECTOR J1-23 J1-22 J1-21 J1-20 J1-19 J1-18 N.C. N.C. D10 N.C. N.C. D9
1 L 2R 3
DVCC
VCC 1 L 2R 3 C2 1F DVCC 2 DVCC VCC JU5 9 C3 0.1F 8 JU2 7 JU3 CS_P J2-3 DIN_P J2-6 DVCC 5 10 JU4
VCC
R1 10k VCC CLK CLK R2 10k CS
J2-1
3
CIN
U3
CLK
CLK_P J2-2
4
MAX1841
RIN RST
CS
R3 10k VCC
DRRV
IO
1 DATA
GND 6
VCC JU7 DIN DIN
J1-5 J1-13 J1-17 J1-16 J1-12 J1-10 J1-4 J1-3 J1-2 N.C. N.C.
LOOPBACK
J2-4 C4 0.1F
5
VCC U4 MAX3370
VL
1 C5 0.1F VCC
GND
6-PIN HEADER
DOUT_P BLINK_P DIN_P CS_P CLK_P
GND DOUT_P
2
R4 10k J2-5 4 IO_VCC I/O_VL 3 JU6 DOUT DOUT
Figure 5. MAX6952 EV Kit Schematic (Sheet 2 of 4) _______________________________________________________________________________________ 7
MAX6952 Evaluation Kit Evaluates: MAX6952
1 2 3 4 5 6 12 11 10 9 8 7
VCC 32 C7 47F C6 0.1F 33 4 5 CLK 19 DIN 18 CS 21 DOUT1 BLINK TP1 MUX_CLK1 22 MUX_CLK 15 ISET R5 61.9k 1% 17 BLINK 20 CS DOUT DIN CLK VCC VCC GND GND 01 02 03 04 05 1 2 3 6 7 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24
A15 A3 A16 A5 A6 A7
C1 R3 C2 R5 R6 R7 D1
R1 R2 C3 R4 C5 C4
A1 A2 A17 A4 A19 A18
U1 MAX6952
16
GND
8 06 9 07 10 08 11 09 12 010 13 011 14 012 23 013 24 014 25 015 26 016 27 017 28 018 29 019 30 020 31 021 34 022 35 023 36 024
A20 A3 A21 A5 A6 A7
1
C1 2 R3 3 C2 4 R5 5 R6 6 R7
R1 R2 D2 C3 R4 C5 C4
12 11 10 9 8 7
A1 A2 A22 A4 A24 A23
A15 A10 A16 A12 A13 A14
1 2 3 4 5 6
C1 R3 C2 R5 R6 R7 D3
R1 R2 C3 R4 C5 C4
12 11 10 9 8 7
A8 A9 A17 A11 A19 A18
A20 A10 A21 A12 A13 A14
1 2 3 4 5 6
C1 R3 C2 R5 R6 R7 D4
R1 R2 C3 R4 C5 C4
12 11 10 9 8 7
A8 A9 A22 A11 A24 A23
Figure 5. MAX6952 EV Kit Schematic (Sheet 3 of 4)
VCC 32 C9 47F C8 0.1F 33 4 5 CLK 19 DOUT1 18 CS 21 DOUT 20 CS DOUT DIN CLK VCC VCC GND GND U2 01 02 03 04 05 1 2 3 6 7 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 B20 B21 B22 B23 B24
B15 B3 B16 B5 B6 B7
1 2 3 4 5 6
C1 R3 C2 R5 R6 R7 D5
R1 R2 C3 R4 C5 C4
12 11 10 9 8 7
B1 B2 B17 B4 B19 B18
MAX6952
TP2 MUX_CLK2
17
BLINK
22 MUX_CLK 15 ISET R6 61.9k 1%
16
GND
8 06 9 07 10 08 11 09 12 010 13 011 14 012 23 013 24 014 25 015 26 016 27 017 28 018 29 019 30 020 31 021 34 022 35 023 36 024
B20 B3 B21 B5 B6 B7
1
C1 2 R3 3 C2 4 R5 5 R6 6 R7
R1 R2 D6 C3 R4 C5 C4
12 11 10 9 8 7
B1 B2 B22 B4 B24 B23
B15 B10 B16 B12 B13 B14
1 2 3 4 5 6
C1 R3 C2 R5 R6 R7 D7
R1 R2 C3 R4 C5 C6
12 11 10 9 8 7
B8 B9 B17 B11 B19 B18
B20 B10 B21 B12 B13 B14
1 2 3 4 5 6
C1 R3 C2 R5 R6 R7 D8
R1 R2 C3 R4 C5 C6
12 11 10 9 8 7
B8 B9 B22 B11 B24 B23
Figure 5. MAX6952 EV Kit Schematic (Sheet 4 of 4) 8 _______________________________________________________________________________________
MAX6952 Evaluation Kit Evaluates: MAX6952
Figure 6. MAX6952 EV Kit Component Placement Guide--Component Side
Figure 7. MAX6952 EV Kit PC Board Layout--Component Side
_______________________________________________________________________________________
9
MAX6952 Evaluation Kit Evaluates: MAX6952
Figure 8. MAX6952 EV Kit PC Board 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.
10 ____________________ Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX6952EVKIT

	To Download MAX6952EVKIT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .