APPLICATION NOTE VACUUM FLUORESCENT DISPLAY MODULE

Transcription

1 AN-E-321 APPLICATION NOTE VACUUM FLUORESCENT DISPLAY MODULE GRAPIC DISPLAY MODULE GP1118A1A GENERAL DESCRIPTION FUTABA GP1118A1A is a graphic display module using a FUTABA VFD. It consists of a driver, a control and power source. The module can be connected directly to the bus line of the host system CPU.

2 ! Important Safety Notice Please read this note carefully before using the product. Warning The module should be disconnected from the power supply before handling. The power supply should be switched off before connecting or disconnecting the power or interface cables. The module contains electronic components that generate high voltages (approx.65v) which may cause an electrical shock when touched. Do not touch the electronic components of the module with any metal objects. The VFD used on the module is made of glass and should be handled with care. When handling the VFD, it is recommended that cotton gloves be used. The module is equipped with a circuit protection fuse. Under no circumstances should the module be modified or repaired. Any unauthorized modifications or repairs will invalidate the product warranty. The module should be abolished as the factory waste. AN-E-321 [Important Safety Notice]

3 CONTENTS 1. FEATURES 1 2. GENERAL DESCRIPTION 2-1. DIMENSIONS, WEIGT SPECIFICATIONS OF TE DISPLAY PANEL ENVIRONMENT CONDITIONS ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING CONDITIONS ELECTRICAL CARACTERISTICS 2 3. BASIC FUNCTION 3-1. FUNCTION TABLE FUNCTION OF SIGNAL LINES COMMAND TABLE RELATIONSIP OF TE DISPLAY AREA TO ADDRESS AND DATA FUNCTION OF COMMANDS 6~8 4. INTERFACE CONNECTION 8 5. TIMING CART 5-1. WRITE-IN TIMING READ-OUT TIMING INT TIMING 9 FIGURE-1 OUTER DIMENSION 1 FIGURE-2 CIRCUIT BLOCK DIAGRAM WARRANTY CAUTIONS FOR OPERATION 12 AN-E-321 [CONTENTS]

4 1. FEATURES 1-1. igh quality and long life can be achieved with FUTABA VFD Compact and light-weight unit by using packed display drivers and one-chip VFD control Driven through a simple interface igh speed 8 bits data write-in capability. 2. GENERAL DESCRIPTION 2-1. DIMENSIONS, WEIGT (Refer to FIGURE-1) Table-1 Item Specification Unit (W) 14±1 Outer dimensions () 68±1 mm (T) 29. MAX. Weight Approx. 3 g 2-2. SPECIFICATIONS OF TE DISPLAY PANEL Table-2 Item Specification Unit Display Area 83.5(W) 41.45() mm Number of Dots Dot Dot Size ( W).5.5 mm Dot Pitch ( W) mm Color Illumination Green (λp=55nm) Luminance 5 (Typ) cd/m 2 Note) By using a filter, uniform color range from blue to orange (including white) can be obtained ENVIRONMENT CONDITIONS Table-3 Item Symbol Min. Max. Unit Operation Temperature Topr Storage Temperature Tstg Operating umidity opr 2 85 % Storage umidity stg 2 9 % Vibration (1 55z) 4 G Shock 4 G Note) Avoid operations and or storage in moist environmental conditions. AN-E-321 [1/12]

5 2-4. ABSOLUTE MAXIMUM RATINGS Table-4 Item Symbol Min. Max. Unit Supply Voltage Vcc Vdc Input Signal Voltage V IS -.3 Vcc+.3 V 2-5. RECOMMEND OPERATING CONDITIONS Table-5 Item Symbol Min. Typ. Max. Unit Supply Voltage Vcc Vdc -Level Input Voltage V I 2.6 V L-Level Input Voltage V IL.7 V 2-6. ELECTRICAL CARACTERISTICS Table-6 Item Symbol Condition Min. Typ. Max. Unit Supply Current (Note 1) Icc 9 13 ma Vcc=5.Vdc Power Consumption W All on Luminance L 25 5 cd/m 2 -Level Output Voltage V O Vcc = 4.5Vdc I O = -2mA 3.6 V L-Level Output Voltage V OL Vcc = 4.5Vdc I OL = 3.2mA.5 V Note) The surge current can be approx. 3 times the specified supply current at power on. AN-E-321 [2/12]

6 3. BASIC FUNCTION 3-1. Function Table 3-2. Function of Signal Lines 3-3. Command Table 3-4. Relationship of The Display Area to Address and Data 3-5. Function of Commands 3-1. Function Table CS WR RD C/ D MODE L Command Write-in L L Data Write-in L L - L L L Data Read-out Table Function of Signal Lines Table-8 Signal I/O Function D~D7 I/O 8bit Data Bus WR I Write Signal RD I Read Signal CS I Chip Select Signal C/ D I Command / Data Select Signal C/ D ="" : Command C/ D ="L" : Data Write and Data Read INT O Frame Signal ( One output pulse per one display frame) Vcc1 - +5V GND - GND AN-E-321 [3/12]

7 3-3. Command Table The followings are all commands of this module. Table-9 Command Setting Data Default Function (C/ D ="") (C/ D ="L") Select Screen 1 & Screen 2 are Displayed off 1 Screen1 is Displayed on 2 Screen2 is Displayed on 3 Screen 1 & Screen 2 are Displayed on 4 Read/Write address is automatically incremented 5 Read/Write address is held 8 D~D7 Display data write-in 9 D~D7 Display data read-out A D~D7 Setting lower address for Screen 1 started B D~D3 Setting upper address for Screen 1 started C D~D7 Setting lower address for Screen 2 started D D~D3 Setting upper address for Screen 2 started E D~D7 Setting lower address of Read/Write F D~D3 Setting upper address of Read/Write 1 OR display of Screen 1 & 2 11 EX-OR display of Screen 1 & 2 12 AND display of Screen 1 & 2 13 D~D7 Brightness Adjustment FF 14 D~D7 Internal function set (Note1) Note 1) When the module is turned on, it has to be written 2 after this command data (14) is sent to a module. Note 2) " " in the above table is shown that the setting data is not needed. AN-E-321 [4/12]

8 3-4. Relationship of The Display Area to Address and Data The following map is shown in case of or display start address. The actual display area is the part of enclosing with the solid line of FIG.1 and FIG.2. FIG.1 & FIG.3 indicate the map at start address to set to F E D C B A EF 3F7 3FF 47 3EE 3F6 3FE 46 3ED 3F5 3FD 45 3EC 3F4 3FC 44 3EB 3F3 3FB 43 3EA 3F2 3FA 42 3E9 3F1 3F9 41 3E8 3F 3F FF 97 9F 8FE 96 9E 8FD 95 9D 8FC 94 9C 8FB 93 9B 8FA 92 9A 8F F FIG.1 Position of display dot to address and data D8 3E 3E8 3F 3D9 3E1 3E9 3F1 8E8 8F 8F8 8E9 8F1 8F9 ADDRESS A 2 A B 3 B 3DA 3E2 3EA 3F2 3DB 3E3 3EB 3F3 8EA 8F2 8FA 8EB 8F3 8FB D7 D6 D C 4 C 3DC 3E4 3EC 3F4 8EC 8F4 8FC D4 D D 5 D E 6 E F 7 F 3DD 3E5 3ED 3F5 3DE 3E6 3EE 3F6 3DF 3E7 3EF 3F7 8ED 8F5 8FD 8EE 8F6 8FE 8EF 8F7 8FF D2 D1 D DATA 1 F F FIG. 2 Indicate the map at start address to set to 9 FIG.3 Data Write-in FIG.3 Data Write-in AN-E-321 [5/12]

9 3-5. Function of Commands Screen Display on / off Control (, 1, 2, 3) The latest command becomes effective. At power on, screen 1 and 2 are set to Display off mode. Therefore, the Display on mode command should be written in, after display pattern data input. In case of executing Display on mode before display data input at initial, random pattern may be displayed Setting of Write Address Mode (4, 5) These commands select either the write or read address is incremented by single step automatically or is held after data write and data read. When a memory address is set to 9F, next memory address is set to Data Write (8) After executing the Write address setting command, this command shall be executed. The following indicate the display data 55, AA and 1 write-in. C/ D CS WR DATA 8 55 AA 1 ADDRESS - n n+1 n Data Read (9) After executing the Read address setting command, this command shall be executed. Dummy read is necessary. The correct data can be read from the second byte. The following indicate the display data read out. C/ D CS WR RD DATA ADDRESS 9 Dummy Valid - n n Valid n+1 AN-E-321 [6/12]

10 Setting of Display Start Address (A, B, C, D) The display start address is just pointed to the left and top line of the display area. Screen 1 and 2 can be independently set the display start address each other. This address is divided to the two portions with upper (four bits) and lower (eight bits) address, and lower address shall be set first, then set the upper address. The smooth scroll of displaying can be achieved by synchronizing with the change of display address by the INT signal at every frame. The following indicate the display start address of screen1 to set to 23E. C/ D CS WR DATA A 3E B Setting of Write/Read Address (E, F) This command is set the write/read address of displaying data, This address is divided the two portion with upper (four bits) and lower (eight bits) address, and lower address shall be set first, then set the upper address. And only the upper address available to be changed independently. When the lower address is changed, it is required to change the both address Screen OR / EX-OR / AND Display Select ( ) The latest command becomes effective Luminance adjustment (13) Write-in data (~5) allows luminance to be adjusted. When the module is turned on, it is set to dimming level %. Table-1 Input Data Luminance 1% (Max.) A 9% 14 8% 1E 7% 28 6% 32 5% 3C 4% 46 3% 5 2% 64~FF % (Display blank) Note1) Write-in data (64~FF)allows luminance to be %. Note2) Write-in data is available from to 5. Note3) Write-in data (51~63) prohibits. AN-E-321 [7/12]

11 Internal function set (14) When the module is turned on, it has to be written 2 after this command data (14) is sent to a module. Note) Do not write an other data instead of INTERFACE CONNECTION Connecter : (MOLEX) 1mm Pitch 2pin FFC connector Table-11 Pin No. Description Pin No. Description 1 D 2 D1 3 D2 4 D3 5 D4 6 D5 7 D6 8 D7 9 GND 1 INT 11 WR 12 RD 13 CS 14 C/ D 15 Vcc 16 Vcc 17 Vcc 18 GND 19 GND 2 N.C AN-E-321 [8/12]

12 5. TIMING CART 5-1. Write-in timing C/ D Min.4nS Min.1nS CS Min.4nS Min.6nS Min.1nS WR DATA Min.6nS Min.1nS Note) The time of each one byte access is neccessary with 1us min Read-out timing C/ D CS RD Min.4nS Min.4nS Min.1nS Min.1nS Max.5nS Min.nS DATA Note ) The time of each one byte access is neccessary with 1us min INT timing The module generates 8usec of INT signal at every 5.28msec of refresh timing. Display start address should be executed during period of INT="" for smooth scroll. 8uS. INT 5.28mS. AN-E-321 [9/12]

13 GP1118A1A OUTER DIMENSION FIGURE-1 AN-E-321 [1/12]

14 GP1118A1A CIRCUIT BLOCK DIAGRAM FIGURE x 64 DOTS GRAPIC DISPLAY CN3 RD WR CS INT C/D D D1 D2 D3 D4 D5 D6 D7 +5.V GND Logic CONTROL ASIC Internal Static-RAM 232bytes DC/DC CONVERTER ANODE CONTROL GRID CONTROL V Ef OSC 2Mz AN-E-321 [11/12]

15 6. WARRANTY This display module is guaranteed for 1 year after the shipment from FUTABA. 7. CAUTIONS FOR OPERATION 7-1. Applying lower voltage than the specified may cause non activation for selected pixels. Conversely, higher voltage may cause non-selected pixel to be activated. If such a phenomenon is observed, check the voltage level of the power supply The DC/DC converter generates approximately 65Vdc, avoid touching it with bare hands, or to other circuits Avoid using the module where excessive noise interface is expected. Noise affects the interface signal and causes improper operation. Keep the length of the interface cable less than 3cm. (When the longer cable is required, please confirm there is no noise affection.) 7-4. When power is turned off, the capacitor will not discharge immediately. Avoid touching IC and others. The shorting of the mounted components within 3 sec., after power off, may cause damage When fixed pattern is displayed for a long time, you may see uneven luminance. It is recommended to change the display patterns sometimes in order to keep best display quality. REMARKS : The specification is subject to change without prior notice. Your consultation with FUTABA sales office is recommended for the use of this module. AN-E-321 [12/12]