HDSP-2301 HP [Agilent(Hewlett-Packard)], HDSP-2301 Datasheet
HDSP-2301
Related parts for HDSP-2301
HDSP-2301 Summary of contents
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... Applications • Avionics • Business Machines • Medical Instruments • Portable Data Entry Devices Description The HDSP-2301/-2302/-2303 series of displays are 5.0 mm (0.20 inch LED arrays for display of alpha- numeric information. These devices are available in yellow, high efficiency red, and high performance green ...
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... Below Seating Plane t < 5 sec ................................................. 260˚C Recommended Operating Conditions (HDSP-2301/-2302/-2303) Parameter Supply Voltage Data Out Current, Low State Data Out Current, High State Column Input Voltage, Column On HDSP-2301/-2302/-2303 Setup Time Hold Time Width of Clock Clock Frequency Clock Transition Time ...
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... The HDSP-2301/-2302/-2303 should be derated linearly above 37˚C at 16.7 mW/˚C. This derating is based on a device mounted in a socket having a thermal resistance from case to ambient at 35˚** C/W per device. See Figure 2 for power deratings based on a lower thermal resistance ...
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... Notes: 4. The characters are categorized for luminous intensity with the intensity category designated by a letter code on the bottom of the package. 5. The HDSP-2301/-2303 are categorized for color with the color category designated by a number code on the bottom of the package refers to the initial case temperature of the device immediately prior to the light measurement. ...
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... MAX 2.4 V CLOCK 1.5 V 1.5 V 1 HOLD 2.4 V DATA IN 1.5 V 1 SETUP 2.4 V DATA OUT 1 PLH Figure 1. Switching Characteristics HDSP-2301/-2302/-2303 (T HDSP-2301/-2302/-2303 2.0 1.8 1.6 1.4 1 60°C 50°C 40°C/W JA 0.6 0.4 0 – AMBIENT TEMPERATURE – °C A Figure 2. Maximum Allowable Power Dissipation vs ...
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... ROWS 1 – – LED LED MATRIX MATRIX COLUMN DRIVE INPUTS Figure 5. Block Diagram of HDSP-2301/-2302/-2303. Ambient Lighting Dim Moderate Polaroid HNCP37 3M Light Control Film Panelgraphic Gray 10 Chequers Grey 105 6 SERIAL DECODED DATA OUTPUT 15 – – 28 ...
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... They are designed for plugging into sockets or soldering into PC boards. The packages may be horizontally or vertically stacked for character arrays of any desired size. The HDSP-2301/- 2302/-2303 utilize a high output current IC to provide excellent readability in bright ambient lighting. Full power operation ( ...
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Data subject to change. Copyright © 1999 Agilent Technologies, Inc. Obsoletes 5953-7749E 5966-2487E (11/99) ...
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... LED dis- play technology in military and aerospace applications. This note is intended to serve as a design and application guide for users of the HDSP-2000 family of alphanumeric display devices. The information presented will cover: the theory of the device design and operation; consider- ations for specific circuit designs ...
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... Table 1. The HDSP-2000 Alphanumeric Display Family ...
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... This ratio is referred to as the display duty factor, and the technique is referred to as “strobing”. In the case of HDSP- 2000, each character is made subsets of 7 bits. For a four character display, 28 bits repre- senting the first subset of each of ...
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... B Drive Circuit Concepts A practical display system utiliz- ing the HDSP-2000 family of displays requires interfacing with a character generator, refresh memory and some timing cir- cuitry. A block diagram of such a display system is depicted in Figure 2. This circuit provides for ASCII data storage and decoding and properly refreshes the display at a 100 Hz refresh rate ...
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... Figure 3 shows four different techniques to interface the HDSP- 200 family displays to microprocessor systems: 1. The REFRESH CONTROLLER interrupts the microprocessor at a 500 Hz rate to request re- fresh data for the display ...
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... SYSTEM CLOCK COUNTER * PROGRAM + ASCII LOOKUP TABLE ** SCRATCHPAD Figure 3. Four Different Techniques to Interface the HDSP-2000 Alphanumeric Display to a Microprocessor System The CODED DATA CONTROL- LER also requires interaction from the microprocessor system only when the display message is changed. Because the ASCII de- ...
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7 ...
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... Display data is loaded from the data bus into the serial input of the HDSP-2000 via a 74165 par- allel in, serial out shift register. The 74LS293 counter and associ- ated gates insure that only seven ...
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... The data is coded so that a HIGH bit will turn the corresponding display dot ON. This decoder table is shown in Figure 9. The resulting dot matrix display font is shown in the HDSP-2471 data sheet. Decoded Data Controller The DECODED DATA CONTROL- LER circuit schematic for a 32 character display is depicted in Figure 10 ...
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The circuit then scans 32 characters from the RAM and seri- alizes the column data by counting through each of the seven rows of the 6674 and gating the appropriate column of the ...
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RFRSH CDVR FF H TURN OFF COLUMN DRIVERS RDVR (POINT) STORE FIRST BYTE DECODED DATA IN 74165 RDVR (POINT + 1) STORE SECOND BYTE DECODED DATA IN 74165 • • • RDVR (POINT + 31) STORE 32nd BYTE DECODED DATA ...
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... This prevents noise from being generated on the clock of the display and eliminates errone- ous display data. The resultant duty factor is (23/32) (1/5) or 14.4%. Since the HDSP-2000 is rated 410 mA and col(max) OBJECT LOC CODE ...
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RFRSH STORE MACHINE STATUS ON STACK B 32 CDVR FF H TURN OFF COLUMN DRIVERS RDVR (POINT) STORE BYTE OF DECODED DATA IN 74165 POINT POINT + 1 UPDATE POINT WITH ADDRESS OF NEXT BYTE B B – ...
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OBJECT LOC CODE SOURCE STATEMENTS 0004 RDVR EQU 0005 CDVR EQU E500 DECDR EQU ORG E000 07 E0 ASCII DW E002 FE COLMN DB E003 FF FF COUNT DW E005 00 E5 BASE DW E007 00 DATA DS ORG E400 ...
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... Figure 9. 128 Character ASCII Decoder Table Used by the 6800 Refresh Program in Figure 6. 8080A Refresh Programs in Figures 7, 8, and 12, and the HDSP-2471 DISPLAY PROCESSOR CONTROLLER. Decoded 5x7 Display Font is shown in the HDSP-247X Data Sheet Display Processor Controller The previously mentioned inter- face techniques provide only for the display of ASCII coded data ...
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16 ...
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... Interfacing the controller to mi- croprocessor systems depends on the needs of the particular appli- cation. Figure 19 depicts a latched interface from a master micropro- cessor to the HDSP-247X series of controllers. These interfaces are utilized to avoid having the master processor wait for the controller to accept data. 17 ...
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OBJECT LOC CODE SOURCE STATEMENTS B000 DISPL EQU E500 DECDR EQU ORG E000 02 E0 ASCII DW E002 00 DATA DS ORG E400 LOAD LXI E403 0E 20 MVI E405 LOOP1 LHLD E408 7E ...
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19 ...
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... ADDRESS CHIP SELECT DATA WR (6800 OR 8080A INTERFACE) (Z-80 INTERFACE ONLY) Figure 14. Memory Write Timing for the 32 Character HDSP-2000 CODED DATA CONTROLLER DISPLAY CLOCK ROW 1 ROW 2 ROW 3 ROW 4 ROW 5 ROW6 ROW COLUMNS OFF (LOAD) Figure 15. Timing Information for the 32 Character HDSP-2000 CODED DATA CONTROLLER ...
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... Figure 17. 82S2708 PROM Listing Display Power Dissipation The HDSP-2000 combines a sig- nificant amount of logic and display capability in a very small package. As such, on-board power dissipation is relatively high and thermal design of the display mounting becomes an important consideration ...
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... When the blanking time goes to zero, the power reduction also goes to zero. For example, the maximum power dissipation for a four char- acter HDSP-2000 display ( 2.4 V, D.F. = COL B 17.5 5.25 V) can be calcu- ...
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24 ...
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... CS* 74LS10 * LOGICAL COMBINATION OF HIGH ORDER ADDRESS BITS THAT DISTINGUISH THE ADDRESS OF THE HDSP-2470/1/2 FROM THE REST OF THE MICROPROCESSOR SYSTEM. Figure 19. Latched Interface to the HDSP-2470/-2471/-2472 DISPLAY PROCESSOR CONTROLLER ONLY REQUIRED FOR RAM MODE 74LS10 ...
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... RESET RESET IRQ IRQ MOTOROLA 6821 Figure 20. 6800 Microprocessor Interface Utilizing a 6820 PIA for an HDSP-2470/-2471/-2472 Alphanumeric Terminal 74LS157 ...
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... CA2 (OUTPUT) MODE 100 CLEARED MPU READ PRA, SET * NEG EDGE OF READY * 1. PORT B: * PB0-PB6 INPUTS DATA TO 6800 FROM DATA OUT OF HDSP-247X * CB1 (INPUT) MODE 00 SETS FLAG NEG EDGE OF DATA VALID * CB2 (INPUT) MODE 000 SETS FLAG NEG EDGE OF ER KEY * CB2 (INPUT) MODE 001 SETS FLAG NEG EDGE OF ER KEY ...
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... INTERRUPT REQUEST 74LS132 74LS00 1 K Figure 22. 8080A Microprocessor Interface Utilizing an 8255 PIA for an HDSP-2470/-2471/-2472 Alphanumeric Terminal Similarly, a typical power dissipa- tion for a four character HDSP-2000 display (n = 15, V COL = 3.0 V, D.F. = 17.5 5. can be calculated as: P (45 mA) (5. 225 mW ...
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... E456 3E 08 MVI A, 08H E458 D3 0F OUT CNTRL E45A CALL LOAD * PROCEDURE TO READ DATA OUT OF HDSP-247X SYSTEM E45D 3E 09 MVI A, 09H E45F D3 0F OUT CNTRL E461 FB El Figure 23. 8080A Microprocessor Program that Interfaces to the Circuit shown in Figure 17. STORE MACHINE STATUS ON STACK ...
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... CS (22) READY READY *SEE HDSP-2470/1/2 DATA SHEET AN1016.24 Figure 24. External Circuitry to Load a Control Word into the HDSP-2470/- 2471/-2472 Alphanumeric System upon Request maximum power dissipation can be reduced to under 1.0 W, while the typical power dissipation can be reduced to 0. most in- door ambients, the D.F. can be reduced to 10% for standard red and 5% for GaP displays ...
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... where Figure 25. Maximum and Typical Power Dissipation for the HDSP-2000/1/2/3 and HDSP-2300 Alphanumeric Displays ...
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... (26 HDSP-2000 DISPLAY 25 MIL INSULATING “TRACES” TO SEPARATE METAL CONDUCTORS Figure 26. Maximum Metalized Printed Circuit for the Agilent HDSP-2000 THERMAL CONDUCTIVE SILICONE RUBBER SHEET (ELECTRICALLY INSULATING) METAL CHASSIS DISPLAY BEZEL AND CONTRAST ENHANCEMENT FILTER HDSP-2000 DISPLAY PRINTED CIRCUIT BOARD ...
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... HDSP-2000 DISPLAY W COPPER BAR PRINTED CIRCUIT BOARD Figure 28. Multiline HDSP-2000 Heat Sink Figure 29. Thermal Resistance Model for Multiline HDSP-2000 Heat Sink The effectiveness of this type of heatsink can be determined by calculating the thermal resistance of each section of bar under each display ...
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... The output of this circuit is used to modulate either the V inputs B of the HDSP-2000 displays or the column enable input circuitry. For maximum reduction in dis- play power, both inputs should be modulated. In the circuit shown in Figure 30, ...
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... CC Since the human eye is very sensi- tive to variations in dominant wavelength in the yellow and green region, all yellow and green HDSP-2000 family displays are also categorized for dominant wavelength. The dominant wave- length bin for each display package is indicated by a number code following the category letter code on the back of the package ...
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