0.270'' 4-Character 5x7 Dot Matrix Serial Input, Dot Addressable Intelligent Display(R) Devices Lead (Pb) Free Product - RoHS Compliant Standard Red SCF5740 Super-red SCF5742 High Efficiency Green SCF5744 DESCRIPTION FEATURES * Four 6.86 mm (0.270") 5 x 7 Dot Matrix Characters in Red, Super-red, High Efficiency Green * Optimum Display Surface Efficiency (display area to package ratio) * High Speed Data Input Rate: 5.0 MHz * ROMless Serial Input, Dot Addressable Display Ideal for User Defined Characters * Built-in Decoders, Multiplexers and LED Drivers * Readable from 1.8 meters (6 Feet) * Wide Viewing Angle, X Axis 55, Y Axis 55 * Attributes: - 140 Bit RAM for User Defined Characters - Eight Dimming Levels - Power Down Model (< 250 W) - Hardware/Software Clear Functions - Internal or External Clock The SCF574X is a four digit, dot addressable 5 x 7 dot matrix, serial input, alphanumeric Intelligent Display device. The four digits are packaged in a rugged, high quality, optically transparent, plastic 22 pin DIP with 2.54 mm (0.1") pin spacing. The on-board CMOS has a 140 bit RAM, one bit associated with one LED, each to generate User Defined Characters. In Power Down Mode, quiescent current is < 50 A. The SCF574X is designed for work with the serial port of most common microprocessors. Data is transferred into the display through the Serial Data Input (DATA), clocked by the Serial Data Clock (SDCLK), and enabled by the Load Input (LOAD). The Clock I/O (CLK I/O) and Clock Select (CLK SEL) pins offer the user the capability to supply a high speed external multiplex clock. This feature can minimize audio in-band interference for portable communication equipment or eliminate the visual sychronization effects found in high vibration environments such as avionic equipment. 2006-01-23 1 SCF5740, SCF5742, SCF5744 Ordering Information Type Color of Emission Character Height mm (inch) SCF5740 standard red SCF5742 super-red SCF5744 high efficiency green Ordering Code Q68000A8848 6.86 (0.270) Package Outlines Q68000A8901 Q68000A8903 Dimensions in mm (inch) EIA Date Code V SCF574X Z OSRAM YYWW 2.54 (0.100) 0.38 (0.015) 0.46 (0.018) x 0.3 (0.012) Leads 22 plcs. 7 (0.276) max. 4.06 (0.160) 0.51 (0.020) Luminous Intensity Code Pin 1 Indicator 15.25 (0.600) 0.51 (0.020) 3.68 (0.145) 0.38 (0.015) 33.02 (1.300) max. 3.99 (0.157) 0.18 (0.007) 4.45 (0.175) 2006-01-23 6.86 (0.270) 20.07 (0.790) 0.25 (0.010) 8.26 (0.325) IDOD5213 2 SCF5740, SCF5742, SCF5744 Maximum Ratings Parameter Symbol Value Unit Operating temperature range Top - 40 ... + 85 C Storage temperature range Tstg - 40 ... + 100 C DC Supply Voltage VCC -0.5 to + 7.0 V -0.5 to VCC +0.5 V 260 C 85 % 2.0 kV Input Current 186 mA Maximum Number of LEDs on at 100% Brightness 64 Power Dissipation 0.65 Input Voltage Levels Relative to GND Solder Temperature 1.59 mm (0.063") below seating plane, t < 5.0 s TS Relative Humidity ESD (100 pF, 1.5 k) VZ W Optical Characteristics at 25C (VCC=5.0 V at 100% brightness level, viewing angle: X axis 55, Y axis 65) Description Luminous Intensity Peak Wavelength Dominant Wavelength Symbol Values Super-red SCF5740 SCF5742 High Efficiency Green SCF5744 55 110 110 cd/dot cd/dot (typ.) peak 655 630 568 nm (typ.) dom 639 626 574 nm (min.) IV Notes: 1. Dot to dot intensity matching at 100% brightness is 1.8:1. 2. Displays within a given intensity category have an intensity matching of 1.5:1 (max.). 2006-01-23 Unit Red 3 SCF5740, SCF5742, SCF5744 Timing Diagram--Data Write Cycle T LDS LOAD T DS DATA TLDH D0 D7 TDH SDCLK T SDCW T SDCLK Timing Diagram--Instruction Cycle TWR TBL LOAD SDCLK DATA D0 D1 D2 D4 D5 D6 D7 D0 D4 D5 D6 D7 D0 D3 OR LOAD SDCLK DATA D0 D1 D2 D3 Switching Specifications (over operating temperature range and VCC=4.5 V to 5.5 V) Symbol Description Min. Units Symbol Description Min. Units TRC Reset Active Time 600 ns TDH Data Hold Time 25 ns TLDS Load Setup Time 50 ns TWR Total Write Time 2.2 s TDS Data Setup Time 50 ns TBL Time Between Loads 600 ns TSDCLK Clock Period 200 ns TLDH Load Hold Time 0 ns TSDCW Clock Width 70 ns Note: TSDCW is the minimum time the SDCLK may be low or high. The SDCLK period must be a minimum of 200 ns. 2006-01-23 4 SCF5740, SCF5742, SCF5744 Electrical Characteristics (over operating temperature) Parameter Min. Typ. Max. Units Conditions VCC 4.5 5.0 5.5 V -- ICC (Pwr Dwn Mode) 4) -- 50 -- A VCC=5.0 V, all inputs=0 V or VCC ICC 4 digits 20 dots/character -- 150 186 mA VCC=5.0 V, "#" displayed in all 4 digits at 100% brightness at 25C IIL Input current -- -- -10 A VCC=5.0 V, VIN=0 (all inputs) IIH Input current -- -- 10 A VCC=VIN=5.0 V (all inputs) VIH 3.5 -- -- V VCC=4.5 V to 5.5 V VIL -- -- 1.5 V VCC=4.5 V to 5.5 V IOH (CLK I/O) -- -28 -- mA VCC=4.5 V, VOH=2.4 V IOL (CLK I/O) -- 23 -- mA VCC=4.5 V, VOL=0.4 V J-pin -- -- 32 C/ W -- Fext External Clock Input Frequency 120 -- 347 kHz VCC=5.0 V, CLKSEL=0 Fosc Internal Clock Input Frequency 120 -- 347 kHz VCC=5.0 V, CLKSEL=1.0 Clock I/O Bus Loading -- -- 240 pF -- Clock Out Rise Time -- -- 500 ns VCC=4.5 V, VOH=2.4 V Clock Out Fall Time -- -- 500 ns VCC=4.5 V, VOH=0.4 V FM, Digit 375 768 1086 Hz -- Notes: 1) Contact OsramOS for 3.3 volt operation. 2) Unused inputs must be tied high. 3) Peak current 5/3 x ICC. 4) External oscillator must be stopped if being used to maintain an ICC < 50 A Input/Output Circuits Figures Inputs" and Clock I/O" show the input and output resistor/diode networks used for ESD protection and to eliminate substrate latch-up caused by input voltage over/under shoot. Inputs Clock I/O VCC VCC Input 1 k GND GND IDCD5021 2006-01-23 1 k Input/Output IDCD5026 5 SCF5740, SCF5742, SCF5744 Top View Pin Definitions 22 Pins Digit 0 Digit 1 1 12 Digit 2 Digit 3 Pins 11 IDPA5118 Pin Assignment Pin Function Definitions 1 N/C -- 2 GND Power supply ground 3 N/C -- 4 N/C -- 5 N/C -- 6 N/C -- 7 N/C -- 8 N/C -- 9 VLL LED supply 10 VCC Logic supply 11 N/C -- 12 N/C -- 13 LOAD Low input enables data clocking into 8-bit serial shift register. When LOAD goes high, the contents of 8-bit serial Shift Register will be decoded. Pin Function Pin Function 1 N/C 22 N/C 2 GND 21 CLKSEL 3 N/C 20 CLK I/O 4 N/C 19 RST 5 N/C 18 N/C 14 DATA Serial data input 6 N/C 17 N/C 15 SDCLK 7 N/C 16 N/C For loading data into the 8-bit serial data register 8 N/C 15 SCLK 16 N/C -- DATA 17 N/C -- N/C -- 9 14 VLL 10 VCC 13 LOAD 18 11 N/C 12 N/C 19 RST Asynchronous input, when low clears the Multiplex Counter, Address Register, Control Word Register, User RAM and Data Register. Control Word is set to 100% brightness. The display will be blank. Dot Matrix Format C2 C3 C4 20 CLK I/O Outputs master clock or inputs external clock. R0 21 CLKSEL H=internal clock (Master), L=external clock (Slave) R1 22 N/C -- C5 R2 0.23 (0.009) typ. R3 6.86 (0.270) 1.09 (0.043) typ. 4.45 (0.175) C1 Display Column and Row Format C0 C1 C2 C3 C4 Row 0 1 1 1 1 1 Row 1 0 0 1 0 0 R5 Row 2 0 0 1 0 0 R6 Row 3 0 0 1 0 0 Row 4 0 0 1 0 0 Row 5 0 0 1 0 0 R4 1.14 (0.045) typ. Tolerance: 0.25 (0.010) IDOD5214 2006-01-23 6 SCF5740, SCF5742, SCF5744 Display Column and Row Format Row 6 C0 C1 C2 C3 C4 0 0 1 0 0 The SCF574X display consists of CMOS IC containing control logic and drivers for four 5 x 7 characters. These components are assembled in a compact plastic package. Individual LED dot addressablity allows the user great freedom in creating special characters or mini-icons. The serial data interface provides a highly efficient interconnection between the display and the mother board. The SCF574X requires only 3 lines as compared to 14 for an equivalent four character parallel input part. The on-board CMOS IC is the electronic heart of the display. The IC accepts decoded serial data, which is stored in the internal RAM. Asynchronously the RAM is read by the character multiplexer at a strobe rate that results in a flicker free display. Figure SCF574X Block Diagram" (page 7) shows the three functional areas of the IC. These include: the input serial data register and control logic, a 140 bits two port RAM, and an internal multiplexer/display driver. 1= Display dot ON" 0=Display dot OFF" Column Data Ranges Row 0 00H to 1FH Row 1 00H to LFH Row 2 00H to LFH Row 3 00H to LFH Row 4 00H to LFH Row 5 00H to LFH Row 6 00H to LFH Operation of the SCF574X SCF574X Block Diagram RST DATA SDCLK LOAD OSC 64 Counter Y Address Decode CLKSEL 8-bit Serial Register CLK I/O 7 Counter MUX Rate Column Drivers Digit 0 to 4 User RAM Memory 7 x 20 bits Row Control Logic and Row Drivers Rows 0 to 6 Display Columns 0 to 20 0 1 2 3 X Address Decode 3-bit Address Register 6-bit Control Word Register Control Word Logic V1 V2 2006-01-23 VDIM Controls IDBD5073 7 SCF5740, SCF5742, SCF5744 The following explains how to format the serial data to be loaded into the display. The user supplies a string of bit mapped decoded characters. The contents of this string is shown in Figure Loading Serial Character Data a" (page 8). Figure Loading Serial Character Data b" (page 8) shows that each character consist of eight 8 bit words. The first word encodes the display character location and the succeeding seven bytes are row data. The row data represents the status (On, Off) of individual column LEDs. Figure Loading Serial Character Data c" (page 8) shows that each 8 bit word is formatted to represent Character Address, or Column Data. Figure Loading Serial Character Data d" (page 8) shows the sequence for loading the bytes of data. Bringing the LOAD line low enables the serial register to accept data. The shift action occurs on the low to high transition of the serial data clock (SDCLK). The least significant bit (D0) is loaded first. After eight clock pulses the LOAD line is brought high. With this transition the OPCODE is decoded. The decoded OPCODE directs D4-D0 to be latched in the Character Address register, stored in the RAM as Column data, or latched in the Control Word register. The control IC requires a minimum 600 ns delay between successive byte loads. As indicated in Figure Loading Serial Character Data a" (page 8), a total of 256 bits of data are required to load all four characters into the display. The Character Address Register bits, D4-D0 (Table Load Character Address" (page 9)), and Row Address Register bits, D7-D5 (Table Load Column Data" (page 9)) direct the Column Data bits, D4-D0 (Table Load Column Data" (page 9)) to specific RAM loca- tion. Table Character 'D'" (page 8) shows the Row Address for the example character "D." Column data is written and read asynchronously from the 140 bit RAM. Once loaded the internal oscillator and character multiplexer reads the data from the RAM. These characters are row strobed with column data as shown in Figures Row and Column Location" (page 9) and Row Strobing" (page 10). The character strobe rate is determined by the internal or user supplied external MUX Clock and the IC's /320 counter. Character "D" Op code D7 D6 D5 Column Data D4 D3 D2 C0 C1 C2 D1 C3 D0 C4 Hex Row 0 0 0 0 1 1 1 1 0 1E Row 1 0 0 0 1 0 0 0 1 11 Row 2 0 0 0 1 0 0 0 1 11 Row 3 0 0 0 1 0 0 0 1 11 Row 4 0 0 0 1 0 0 0 1 11 Row 5 0 0 0 1 0 0 0 1 11 Row 6 0 0 0 1 1 1 1 0 1E Loading Serial Character Data Example: Serial Clock = 5.0 MHz, Clock Period = 200 ns 352 Clock Cycles, 70.4 s a. Character 0 Character 1 Character 2 Character 3 88 Clock Cycles, 17.6 s b. Character 0 Row 0 Column Row 1 Column Row 2 Column Row 3 Column Row 4 Column Row 5 Column Row 6 Column Data Data Data Address Data Data Data Data 11 Clock Cycles, 2.2 s c. Character Address OPCODE D0 D1 D2 D3 D4 0 0 0 0 0 D5 D6 D7 1 0 1 11 Clock Cycles, 2.2s Column Data Time Between D0 D1 D2 D3 D4 Loads D D 600 ns(min) D D D OPCODE Time Between D5 D6 D7 Loads 0 0 0 600 ns(min) LOAD Serial Clock Clock Period DATA d. D0 D1 D2 D3 D4 t0 2006-01-23 8 D5 D6 D7 Time between LOADS SCF5740, SCF5742, SCF5744 Load Character Address Display Brightness Op code D7 D6 D5 Character Address D4 D3 D2 D1 D0 Hex Operation Load Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 1 0 1 0 0 0 0 0 1 0 1 0 0 0 0 1 1 0 1 0 0 0 1 1 0 1 0 0 0 1 A0 Character 0 1 1 1 0 0 0 0 A1 Character 1 1 1 1 0 0 0 0 0 A2 Character 2 1 1 1 0 0 0 1 A3 Character 3 1 1 1 0 0 1 1 1 0 1 1 1 1 1 1 1 Load Column Data Operation Load Hex Operation Level 0 E0 100% 1 E1 53% 1 0 E2 40% 0 1 1 E3 27% 0 1 0 0 E4 20% 0 0 1 0 1 E5 13% 1 0 0 1 1 0 E6 6.6% 1 0 0 1 1 0 E7 0.0% Hex Operation Level Op code D7 D6 D5 Column Data D4 D3 D2 D1 D0 0 0 0 C0 C1 C2 C3 C4 Row 0 0 0 0 C0 C1 C2 C3 C4 Row 1 0 0 0 C0 C1 C2 C3 C4 Row 2 Display Brightness 0 0 0 C0 C1 C2 C3 C4 Row 3 Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 1 1 1 0 1 0 0 0 E8 100% 1 1 1 0 1 0 0 1 E9 53% 1 1 1 0 1 0 1 0 EA 40% The user can activate four Control functions. These include: LED Brightness Level, Prescaler, IC Power Down, or Display Clear. OPCODEs and six bit words are used to initiate these functions. The OPCODEs and Control Words for the Character Address and Loading Column Data are shown in Tables Load Character Address" (page 9) and Load Column Data" (page 9). The user can select eight specific LED brightness levels, Tables Display Brightness" (page 9). Depending on how D3 is selected either one (1) for maximum peak current or zero (0) for 12.5% of maximum peak current in the control word per Tables Display Brightness" (page 9), the user can select 16 specific LED brightness levels. These brightness levels (in percentages of full brightness of the display) include: 100% (E0 HEX or E8 HEX), 53% (E1HEX or E9 HEX), 40% (E2HEX or EA HEX), 27% (E3HEX or EB HEX), 20% (E4HEX or EC HEX), 13% (E5HEX or ED HEX), and 6.6% (E6HEX or EE HEX), 0.0% (E7 HEX or EF HEX). The brightness levels are controlled by changing the duty factor of the row strobe pulse. 1 1 1 0 1 0 1 1 EB 27% 1 1 1 0 1 1 0 0 EC 20% 1 1 1 0 1 1 0 1 ED 13% 1 1 1 0 1 1 1 0 EE 6.6% 1 1 1 1 1 1 1 0 EF 0.0% Row and Column Location Op code D7 D6 D5 Control Word D4 D3 D2 D1 D0 1 1 1 0 0 0 C0 C1 C2 C3 C4 Row 4 0 0 0 C0 C1 C2 C3 C4 Row 5 0 0 0 C0 C1 C2 C3 C4 Row 6 Row 0 Off LED Row 1 On LED Row 2 Previously "on" LED The SCF574X offers a unique Display Power Down feature which reduces ICC to less than 50 A. When EFHEX is loaded, as shown in Table Power Down" (page 9), the display is set to 0% brightness and the internal multiplex clock is stopped. When in the Power Down mode data may still be written into the RAM. The display is reactivated by loading a new Brightness Level Control Word into the display. Power Down Row 3 Row 4 Row 5 Row 6 0 2006-01-23 1 2 3 Columns 4 IDXX5189 9 1 1 1 1 1 Hex Operation Level EF 0% brightness SCF5740, SCF5742, SCF5744 Row Strobing Row Load Load Row 0 Load Row 1 Load Row 2 Load Row 3 Load Row 4 Load Row 5 Load Row 6 0 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3 3 3 3 4 4 4 4 4 4 4 5 5 5 5 5 5 5 6 6 6 6 6 6 0 1 2 3 4 Columns 0 1 2 3 4 Columns 0 1 2 3 4 Columns 0 1 2 3 4 Columns 0 1 2 3 4 Columns 6 0 1 2 3 4 Columns 0 1 2 3 4 Columns IDXX5190 Electrical & Mechanical Considerations The SCF574X allows a high frequency external oscillator source to drive the display. Data bit, D4, in the control word format controls the prescaler function. The prescaler allows the oscillator source to be divided by 16 by setting D4=1. However, the prescaler should not be used, i.e., when using the internal oscillator source. The Software Clear (C0HEX), given in Table Software Clear" (page 10), clears the Address Register and the RAM. The display is blanked and the Character Address Register will be set to Character 0. The internal counter and the Control Word Register are unaffected. The Software Clear will remain active until the next data input cycle is initiated. Thermal Considerations Optimum product performance can be had when the following electrical and mechanical recommendations are adopted. The SCF574X's IC is constructed in a high speed CMOS process, consequently high speed noise on the SERIAL DATA, SERIAL DATA CLOCK, LOAD and RESET lines may cause incorrect data to be written into the serial shift register. Adhere to transmission line termination procedures when using fast line drivers and long cables (< 10 cm). When the internal MUX Clock is being used connect the CLKSEL pin to VCC. In those applications where RESET will not be connected to the system's reset control, it is recommended that this pin be connected to the center node of a series 0.1 F and 100 k RC network. Thus upon initial power up the RESET will be held low for 10 ms allowing adequate time for the system power supply to stabilize. Software Clear Op code D7 D6 Control Word D5 D4 D3 D2 D1 D0 1 0 0 0 1 0 0 0 Hex Operation Level C0 CLEAR ESD Protection The input protection structure of the SCF574X provides significant protection against ESD damage. It is capable of withstanding discharges greater than 2.0 kV. Take all the standard precautions, normal for CMOS components. These include properly grounding personnel, tools, tables, and transport carriers that come in contact with unshielded parts. If these conditions are not, or cannot be met, keep the leads of the device shorted together or the parts in anti-static packaging. Multiplexer and Display Driver The four characters are row multiplexed with RAM resident column data. The strobe rate is established by the internal or external MUX Clock rate. The MUX Clock frequency is divided by a 448 counter chain. This results in a typical strobe rate of 768 Hz. By pulling the Clock SEL line low, the display can be operated from an external MUX Clock. The external clock is attached to the CLK I/O connection (pin 9). The maximum external MUX Clock frequency should be limited to 1.0 MHz. An asynchronous hardware Reset is also provided. Bringing this pin low will clear the Character Address Register, Control Word Register, RAM, and blanks the display. This action leaves the display set at Character Address 0, and the Brightness Level set at 100%. 2006-01-23 Soldering Considerations The SCF574X can be hand soldered with SN63 solder using a grounded iron set to 260C. Wave soldering is also possible following these conditions: Preheat that does not exceed 93C on the solder side of the PC board or a package surface temperature of 85C. Water soluble organic acid flux (except carboxylic acid) or rosin-based RMA flux without alcohol can be used. Wave temperature of 245C 5C with a dwell between 1.5 sec. to 3.0 sec. Exposure to the wave should not exceed temperatures above 260C for five seconds at 1.59 mm (0.063") below the seating plane. The packages should not be immersed in the wave. 10 SCF5740, SCF5742, SCF5744 Post Solder Cleaning Procedures The least offensive cleaning solution is hot D.I. water (60 C) for less than 15 minutes. Addition of mild saponifiers is acceptable. Do not use commercial dishwasher detergents. For faster cleaning, solvents may be used. Exercise care in choosing solvents as some may chemically attack the nylon package. For further information refer to Appnotes 18 and 19 at www.osram-os.com An alternative to soldering and cleaning the display modules is to use sockets. Naturally, 14 pin DIP sockets 7.62 mm (0.300") wide with 2.54 mm (0.100") centers work well for single displays. Multiple display assemblies are best handled by longer SIP sockets or DIP sockets when available for uniform package alignment. Socket manufacturers are Aries Electronics, Inc., Frenchtown, NJ; Garry Manufacturing, New Brunswick, NJ; Robinson-Nugent, New Albany, IN; and Samtec Electronic Hardward, New Albany, IN. For further information refer to Appnote 22 at www.osram-os.com Additional contrast enhancement is gained by shading the displays. Plastic band-pass filters with built-in louvers offer the next step up in contrast improvement. Plastic filters can be improved further with anti-reflective coatings to reduce glare. The trade-off is fuzzy characters. Mounting the filters close to the display reduces this effect. Take care not to overheat the plastic filter by allowing for proper air flow. Optimal filter enhancements are gained by using circular polarized, anti-reflective, band-pass filters. The circular polarizing further enhances contrast by reducing the light that travels through the filter and reflects back off the display to less than 1%. Several filter manufacturers supply quality filter materials. Some of them are: Panelgraphic Corporation, W. Caldwell, NJ; SGL Homalite, Wilmington, DE; 3M Company, Visual Products Division, St. Paul, MN; Polaroid Corporation, Polarizer Division, Cambridge, MA; Marks Polarized Corporation, Deer Park, NY, Hoya Optics, Inc., Fremont, CA. One last note on mounting filters: recessing displays and bezel assemblies is an inexpensive way to provide a shading effect in overhead lighting situations. Several Bezel manufacturers are: R.M.F. Products, Batavia, IL; Nobex Components, Griffith Plastic Corp., Burlingame, CA; Photo Chemical Products of California, Santa Monica, CA; I.E.E.-Atlas, Van Nuys, CA. Optical Considerations The 6.86 mm (0.270") high character of the SCF574X gives readability up to five feet. Proper filter selection enhances readability over this distance. Using filters emphasizes the contrast ratio between a lit LED and the character background. This will increase the discrimination of different characters. The only limitation is cost. Take into consideration the ambient lighting environment for the best cost/benefit ratio for filters. Incandescent (with almost no green) or fluorescent (with almost no red) lights do not have the flat spectral response of sunlight. Plastic band-pass filters are an inexpensive and effective way to strengthen contrast ratios. The SCF5740 is a red display and should be used with long wavelength pass filter having a sharp cut-off in the 600 nm to 620 nm range. The SCF5742 is a super-red display and should be used with long wavelength pass filter having a sharp cut-off in the 570 nm to 600 nm range. The SCF5744 is a high efficiency green display and should be used with long wavelength pass filter that peaks at 565 nm. Microprocessor Interface The microprocessor interface is through the serial port, SPI port or one out of eight data bits on the eight bit parallel port and also control lines SDCLK and LOAD. Power Up Sequence Upon power up display will come on at random. Thus the display should be reset at power-up. The reset will set the Address Register to Digit 0, User RAM is set to 0 (display blank) the Control Word is set to 0 (100% brightness with Lamp Test off) and the internal counters are reset. Display Interface to Siemens/Intel 8031 Microprocessor (using serial port in mode 0) VCC 40 19 XTAL2 RxD XTAL1 TxD VCC 10 11 15 13 U1 8031 VCC 9 P3.7 RST P3.3 P3.4 17 19 13 2 14 GND SDCLK LD DATA ID RST VCC GND CLKSEL CLK I/O 14 22 F TAN + 18 10 21 8 0.01 F IDCD5224 2006-01-23 11 SCF5740, SCF5742, SCF5744 Display Interface with Siemens/Intel 8031 Microprocessor (using one bit of parallel port as serial port) VCC 40 19 XTAL2 P3.0 P3.1 1 9 VCC 11 XTAL1 P3.6 U1 8031 VCC 10 P0.0 16 15 39 13 RST 19 P1.0 2 SDCLK GND LD DATA ID 20 RST VCC GND CLKSEL CLK I/O 22 F TAN 14 + 18 10 21 0.01 F 8 IDCD5225 Display Interface with Motorola 68HC05C4 Microprocessor (using SPI port) VCC 40 39 OSC1 PA1 1 9 11 VCC 10 OSC2 U1 68HC05C4 VCC PA0 SCLK MOSI 33 15 32 13 RST 19 PA2 2 20 SDCLK GND LD DATA ID RST VCC GND CS CLK I/O 14 22 F TAN + 38 10 21 8 0.01 F IDCD5226 2006-01-23 12 SCF5740, SCF5742, SCF5744 Cascading Multiple Displays Multiple displays can be cascaded using the CLKSEL and CLK I/O pins as shown below. The display designated as the Master Clock source should have its CLKSEL pin tied high and the slaves should have their CLKSEL pins tied low. All CLK I/O pins should be tied together. One display CLK I/O can drive 15 slave CLK I/Os. Use RST to synchronize all display counters. Cascading Multiple Displays RST VCC RST CLK I/O CLK SEL Intelligent Display DATA SDCLK RST 14 more displays in between CLK SEL Intelligent Display DATA LOAD CLK I/O SDCLK LOAD DATA SDCLK 0 A0 A1 A2 A3 Address Decoder Chip 15 LD CE Address Decode 1-14 IDCD5030 Loading Data Into the Display Use following procedure to load data into the display: 1. Power up the display. 2. 3. 4. 5. 6. Bring RST low (600 ns duration minimum) to clear the Multiplex Counter, Address Register, Control Word Register, User Ram and Data Register. The display will be blank. Display brightness is set to 100%. If a different brightness is desired, load the proper brightness opcode into the Control Word Register. Load the Digit Address into the display. Load display row and column data for the selected digit. Repeat steps 4 and 5 for all digits. 2006-01-23 13 SCF5740, SCF5742, SCF5744 Data Contents for the Word "ABCD" Step D7 D6 D5 D4 D3 D2 D1 D0 Function A B (optional) 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 CLEAR 100% BRIGHTNESS 1 2 3 4 5 6 7 8 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 1 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 1 1 1 1 DIGIT D0 SELECT ROW 0 (A) ROW 1 (A) ROW 2 (A) ROW 3 (A) ROW 4 (A) ROW 5 (A) ROW 6 (A) 9 10 11 12 13 14 15 16 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 1 1 1 1 0 1 1 1 DIGIT D1 SELECT ROW 0 (B) ROW 1 (B) ROW 2 (B) ROW 3 (B) ROW 4 (B) ROW 5 (B) ROW 6 (B) 17 18 19 20 21 22 23 24 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0 1 1 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 DIGIT D2 SELECT ROW 0 (C) ROW 1 (C) ROW 2 (C) ROW 3 (C) ROW 4 (C) ROW 5 (C) ROW 6 (C) 25 26 27 28 29 30 31 32 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 0 1 1 1 1 1 0 DIGIT D3 SELECT ROW 0 (D) ROW 1 (D) ROW 2 (D) ROW 3 (D) ROW 4 (D) ROW 5 (D) ROW 6 (D) 2006-01-23 14 SCF5740, SCF5742, SCF5744 Revision History: 2006-01-23 Previous Version: 2005-01-10 Page Subjects (major changes since last revision) Date of change all Lead free device 2006-01-23 Published by OSRAM Opto Semiconductors GmbH Wernerwerkstrasse 2, D-93049 Regensburg www.osram-os.com (c) All Rights Reserved. Attention please! The information describes the type of component and shall not be considered as assured characteristics. Terms of delivery and rights to change design reserved. Due to technical requirements components may contain dangerous substances. For information on the types in question please contact our Sales Organization. If printed or downloaded, please find the latest version in the Internet. Packing Please use the recycling operators known to you. We can also help you - get in touch with your nearest sales office. By agreement we will take packing material back, if it is sorted. You must bear the costs of transport. For packing material that is returned to us unsorted or which we are not obliged to accept, we shall have to invoice you for any costs incurred. Components used in life-support devices or systems must be expressly authorized for such purpose! Critical components1) may only be used in life-support devices or systems2) with the express written approval of OSRAM OS. 1) 2) A critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the failure of that life-support device or system, or to affect its safety or the effectiveness of that device or system. Life support devices or systems are intended (a) to be implanted in the human body, or (b) to support and/or maintain and sustain human life. If they fail, it is reasonable to assume that the health and the life of the user may be endangered. 2006-01-23 15