liquid crystal display module g121c00p00c g121cb1p00c
Contents
1. Light G121c00Pooc 7 9709 Bent Y 92 Es Y 21809 9 01 LCD panel l i x L X 90 I i 1 Y 920 Z 0 90 Light G121CB1P00C LED ON Note 3 Definition of contrast C Brightness of non selected dot Bz Brightness of selected dot Bi Brightness for i selected dot I I i Brightness curve for non selected dot Brightness I i 0 Operating voltage v V Light Brightness Dark Vopr Operating voltage ton f AN No G121C C 561E Note 2 Definition of viewing angles 61 and 62 Cmax Contrast C 2 0 1 4 01 02 Viewing angle Remark The optimum viewing angle by visual inspection and angle 0 at Cmax do not always match Note 4 Definition of response time Vopr 1 frim lt gt Selected status display ON Non selected status display OFF Non selected status LA 10 A lt gt l ton gt tot Response time rise F M Frame frequency tor Response time fall Note The measurements must be made using a G121C transmissive LCD panel Figure 1 Definition AN No G121C C 561E 1 7 LCD Panel Lifetime Item Conditions Standard Unit n 25 C 10T Lifetime lt 65 RH 100 000 or more hrs Definition of lifetime the time up to occurrence of any of the following Contrast reduce2. 3 8 2 68 series A15 Z80 Do to D7 RD gt WR gt RESET I al RESET Figure 12 VMA AO A1 gt A2 Decoder to A15 6802 Do to D7 E gt R W RESET re I RESET Figure 13 AN No G121C C 561E ag gt INH Do to D7 RD WR RES G121C00P00C G121CB1P00C SEL1 SEL2 A0 INH Do to D7 RD WR RES G121C00P00C G121CB1P00C Von _ MDP SEL1 SEL2 _ a AN No G121C C 561E 4 LED BACKLIGHT 4 1 4 2 4 3 4 4 Absolute Maximum Ratings Item Symbol Standard Unit DC forward current IF 200 mA DC reverse voltage VR 8 V Allowable dissipation Pp 950 mW Operating temperature range Topr 20 to 70 C Storage temperature range Tstg 30 to 80 C Forward current reduction characteristics The absolute maximum ratings of forward current depends on the ambient temperature IF mA Ta C Electro optical Characteristics Ta 25 C Item Symbol Conditions Min Typ Max Unit Forward voltage Vr IF2100mA 3 7 4 1 4 5 V Reverse current IR Vn 8V 300 uA LED Backlight Diagram e e e e e e e LEDA Number of LED chips 20 e d 4 4 4 d A 4 LEDC Brightness Top surface of LCD Item Symbol Min Typ Max Unit Surface br
3. Table 6 Forward voltage at each temperature Temperature Ta Requirements Vr min Vr typ Vr max 20 C IF 100mA 3 9V 4 3V 4 7V 25 C IF 100mA 3 7V 4 1V 4 5V 70 C IF 50mA 3 4V 3 6V 3 9V The resistance value R is calculated using the following equation See Figure 14 VIN Input voltage power supply voltage V VF LED forward voltage V IF Allowable LED forward current A VIN VF ee The forward current on the above value of the resistance is 50 mA or less at 25 C The surface brightness of the LED backlight varies according to the forward current as shown in Figure 15 Consequently the brightness becomes 3096 compared to the case described in 4 4 brightness IF 100 mA 25 AN No G121C C 561E Relative brightness 1 2 1 0 0 8 0 6 0 4 0 2 TEN 80 40 50 60 70 80 90 100 110 Forward current IF mA Figure 15 Forward Current Brightness Characteristics Ta 25 C 2 Circuit Example 2 Using a thermo sensitive device such as a thermister and a transistor set them to approximately IF 100 mA at 25 C and design the circuit so that IF becomes less as the temperature rises to assure the brightness at 25 C 2 nit LEDA R2 Vu eps LEDC G121C Tr A SCH R3 B Thermistor R1 R4 Figure 16 LED Backlight Driver Example 2 26 AN No G121C C 561E 5 PRECAUTIONS Safety
4. Wilting into Memory display memory Control MREAD 101 01000011 43a Reading display Sg memory data Note 1 A command is executed every time each parameter is input to the LCD controller and completed when the following parameters P or command C is entered Consequently the MPU can abort sending the parameters and send the following command In this case the parameters which have been sent are effective and the values of the remaining parameters which have not been sent remain unchanged Note that 2 byte parameters are handled as follows 1 CSRW and CSRR commands Parameters are executed per byte Consequently only the lower bytes can be changed or checked 2 All the commands but CSRW and CSRR commands Executed after the second byte of the parameter is entered SYSTEM SET SCROLL CGRAM ADR 2 byte parameter indicates 1 data with 2 bytes such as APL and APH For a description of commands and their parameters refer to SED1335F 1336F LCD Controller IC Application Manual Seiko Epson Corporation 3 6 3 7 AN No G121C C 561E Display Data RAM The built in LCD controller can control 512 Kbit 0000H to FFFFH of the VRAM area However because the G121C has only 64 Kbit of built in VRAM the upper 3 bits are not effective Consequently when you define the addresses over 2000H the display data is destroyed because the data is mapped to the VRAM area defined by the lower 13 bits Do not map the data onto
5. 16 addresses 4 SCROLL C 44H P1 00H Sets the start address of the first block screen to 0000H P2 00H P3 7FH Sets the display lines of the first block screen to 128 P4 00H Sets the start address of the second block screen to 0100H P5 01H P6 7FH Sets the display lines of the second block screen to 128 Diplay memory 0000H OOFFH r First block display memory 0100H r Second block display memory O8FFH 20 AN No G121C C 561E No Command Operation 5 HDOT SCR C 5AH P1 00H Sets the dot shift in the X direction to 0 6 OVLAY C 5BH MX1 MXO Simple overlay OR P1 00H DM1 First block screen Character mode DN2 Third block screen Character mode OV Combination of character mode and graphics mode 7 DISP ON OFF C 58H D All screen display OFF P1 2 16H FC1 FCO Blinking with cursor ON Approx 2 Hz FP1 FPO First block screen display ON FP3 FP2 Second block screen display ON FP5 FP4 Third block screen display OFF 8 CLEAR FIRST LAYER Writes space character code 20H onto the corresponding first DISPLAY DATA CSRW C 46H P1 00H P2 00H CSR DIR C 4CH MWRITE C 42H P1 20H P2 20H Pn 20H n 256 layer memory character screen Sets the VRAM address corresponding to the start address of the first block screen home address Sets 1 to the automatic shift direction of the address counter Sets
6. CL2 lt generator Segment Segment driver 1 driver 2 Common driver 1 128x128 full dot matrix LCD Bias voltage Common genertor driver 2 Va Vb Ve Vi Vopr Va to Vi control circuit G121CB1P00C module with backlight only LCD controller SED1335F Common driver HD66205TF Segment driver HD66204TF Figure 3 Block Diagram 8 2 2 2 3 2 4 AN No G121C C 561E LCD Controller SEIKO EPSON SED1335F The LCD controller SED1335F is located between the MPU and the LCD panel The LCD controller stores the character codes and the bit mapped graphics data from the MPU in the display data RAM 8KB and then periodically reads out the stored data converts it and sends the converted signal to the LCD module Also through many command functions it is possible to overlap the character screen with the graphics screen and scroll the screen in all directions Common Driver HITACHI HD66205TF The common driver CD is an 80 drive output CMOS IC Two CDs are used in conjunction with each other in the G121C and operate as follows The CDs read the input one frame timing signal FLM into the internal register at the one common line timing signal CL1 fall edge trigger and shift it sequentially The common drive waveform is formed by the contents of this shift register and the si
7. If the LCD panel is damaged be careful not to get the liquid crystal in your mouth and not to be injured by crushed glasses If you should swallow the liquid crystal first wash your mouth thoroughly with water then drink a lot of water and induce vomiting and then consult a physician If the liquid crystal should get in your eye flush your eye with running water for at least fifteen minutes If the liquid crystal touches your skin or clothes remove it and wash the affected part of your skin or clothes with soap and running water Use the LCD module within the rated voltage to prevent overheating and or damage Also take steps to ensure that the connector does not come off Handing Avoid static electricity as it will damage the CMOS LSI The LCD panel is made of plate glass Do not hit crush or bend it Do not remove the panel or frame from the module The polarizer of the display is very fragile Handle it with care Mounting and design Mount the module using the specified mounting parts and holes e To protect the module against external pressure place a transparent plate e g acrylic or glass on the module leaving a small gap between the display surface and transparent plate X Example Small gap Exterior face Transparent plate Module A P J Screw CP a2 Keep the module dry Avoid cond
8. 20 0 19 0 18 0 Vopr Vpp Vo D re AN No G121C C 561E 2 6 Bias Voltage Generator Six levels of voltage Va to Vf are applied to the drivers as a bias voltage This voltage is generated from Vopr by dividing the resistance and driven by a voltage follower through an operational amplifier Von O MV O Va 4 Ri z C A O Vb e Mr Ri T R e gt O Ve i Vopr R2 B UU C A O Va e 4 Ri rt E hg O Ve b J Operational Jj Ri Amplifier TC Q e bd O Vi 1 10 bias Re 10 4 Ri 6R Figure 5 Bias Voltage Generator 2 7 M Generator M generator outputs the Ex ORed signal between the divided signal of the one common line timing signal CL1 to A and the divided signal of the one frame timing signal FLM to B as M which makes up the LC drive waveform AC The values of A and B are set according to the LC panel to allow for the best quality display and to allow the drive voltage to be converted to AC CL1 l A division M FLM B division Ex OR gate ege eher ee A EE E E Figure 6 M generator i AN No G121C C 561E OPERATING INSTRUCTIONS 3 1 Terminal Functions Table 3 Terminal Functions 1 Signal Q ty y o Functions RES 1 Input Active L Executes initial reset to the LCD controller by hardware RD 1 Input 80 series MPU Active L Strobe signal when MPU rea
9. at the one common line timing signal CL1 fall edge trigger The segment drive waveform is formed by the display data and the signal to make the liquid crystal drive waveform AC M The INH signal and the YDIS signal from the LCD controller control SEG output When the INH signal or the YDIS signal is set to L Va is output to SEG output regardless of the contents of the shift register and M signal Consequently when the INH at the input terminal or the YDIS signal from the LCD controller is set to L Va is applied to COM output and SEG output OV 1s applied to the liquid crystal and the display is set to off Vopr control circuit The viewing angle of the LCD panel and the shade of the screen depends on the liquid crystal operating voltage Vopr With the G121C VLC is applied from outside This VLC as shown in Figure 4 is supplied with an operational amplifier and the voltage Vopr Va to Vf applied to the LCD panel is generated Vop 5V Ra 12kQ Vopr Va to Vi vR 100k9 Z Ve e o i Operational Vic 24V Q E T eer Cee eS Cee Te Sore ee eee EE eh TO G121C ee er Tr ree ere Figure 4 Vopr Control Circuit Also the viewing angle of the LCD panel and shade of the screen depend on the ambient temperature The recommended values of the Vopr for the ambient temperature are as follows Table 2 LC operating voltage Temperature C 20 0 25 50 70 Voltage Vopr V 22 0 21 5
10. the space code Sets the space code Sets the space code Display J i Assigns space character code 20H to all addresses First layer 1 B Second layer Assigns blank data OOH to all addresses p AN No G121C C 561E No Command Operation 9 CLEAR SECOND LAYER Writes blank data 00H dot light OFF onto the corresponding DISPLAY DATA memory of the second layer graphics screen CSRW Sets the VRAM address corresponding to the start address of the C 46H second block screen home address P1 00H P2 01H MWRITE C 42H P1 00H Sets the blank data P2 00H Sets the blank data Pm 00H m 2048 Sets the blank data 10 CSRW C 46H P1 00H Sets the cursor address to the start address of the first block screen P2 00H home position 11 CSR FORM C 5DH CRX Cursor size in the X direction 5 dots P1 04H CRY Cursor size in the Y direction 7 dots P2 86H CM Block cursor 12 DISP ON OFF C 59H Cancels All screen display OFF Screen 13 CSR DIR C 4CH Sets the cursor shift direction to right 14 MWRITE C 42H P1 20H Sets the space code P2 53H Sets the character code of S P3 49H Sets the character code of I P4 49H Sets the character code of I SIL Screen ls 3 8 3 8 1 80 series IORQ AO A1 A2 to Example of the MPU Interface Decoder
11. time icvca ai ns WR RD Control pulse width tcc 120 ns Data hold time Tous 5 ns Data setup time tose 120 ns Do to D7 RD access time taccs 50 ns Output disable time ous 10 50 ns tcvca 785 Applies to Memory control command and System control command tcycs 2tc tcc tcEA 75 gt tacT 245 tcycs 820 Applies to all the commands except the commands above icycs 4tc tcc 30 Timing Chart taws tans N A0 CS tcvca gt tcc gt WR BD toss tos Do to D7 NM WRITE yV taccs tous Do to D7 UM READ m 14 AN No G121C C 561E 3 2 2 Read Write Characteristics 68 series MPU Ta 20 C 70 C Vop 5 0V 5 Vss 0V Signal Item Symbol Min Typ Max Unit Address hold time Late 0 ns A0 CS WR Address setup time tawe 0 ns System cycle time icvce s ns Data hold time tDH6 0 ns Data setup time tose 100 ns Do to D7 Access time tacce 85 ns Output disable time toHe 10 50 ns RD Enable pulse width tRDW 120 ns tcvce 785 Applies to Memory control command and System control command tcyce 2tc tROW tCEA 75 gt tacv 245 tcyc 820 Applies to all the commands except the commands above tcvce 4tc tcc 30 NEN Note tcvce indicates the cy
12. AN No G121C C 561E LIQUID CRYSTAL DISPLAY MODULE G121CO00P00C G121CB1P00C USER S MANUAL Seiko Instruments Inc NOTICE AN No G121C C 561E This manual provides technical information covering functions and operational instructions for the G121C liquid crystal display modules with a built in LCD controller Please read through this manual before operating the product Distribution of this manual to third parties for any purpose other than operation of the product is prohibited The descriptions herein are subject to change without prior notice Application information is intended solely for general guidance Use of the information contained herein for the user s application is done at the user s risk Revision Record Version Revision Date 1 Original September 1994 2 June 1995 Copyright 1994 by Seiko Instruments Inc Printed in Japan AN No G121C C 561E CONTENTS e G121C00PO00C G121CB1P00C 1 SPECIFICATIONS LI soient iode dede sn meret t et 1 1 2 Features E 1 1 8 Absolute Maximum Ratings excluding LED backlight 2 14 Mechanical Characterist es secerat siecsatcvesxesusiasesseanstedccenacexdoviies 2 1 5 Electrical Characteristics excluding LED backlight eeesesssss 3 16 Optical Characteristics eee EECH 4 L7 CCD ME 6 LS EE 7 2 CIRCUIT CONFIGURATION 2 1 Block Dia crani EE 8 2 2 LCD Controller SEIKO EPSON SE
13. D1385F seen 9 2 8 Common Driver HITACHI HD66205TP sssesseeeeerenennnen enne 9 2 4 Segment Drivers HITACHI HD66204TF sess 9 2 5 Vopr Control CIGQuib s iiis e ta ive meer Eee eer rie co tor ERE i rrt 10 2 6 Bias Voltage Generator cccccscsscscccsccececceccecscessessnseauccecceceececceccseseessesssnees 11 KE NEE 11 3 OPERATING INSTRUCTIONS 9 1 Terminal OR ee 12 3 2 Timing Chatact risties ieeiii eerie teret ie ee dedo e e eebe dee 14 KSC 16 3 4 Setting the Power Supply and the Signals to On or Off ssssss 16 AE EE 17 3 6 Display Data E ME 18 3 7 Example of an Initial Setting sse ssas Esis N rrr en nein 18 3 8 Example of MPU Interface 23 e G121CB1P00C 4 LED BACKLIGHT 4 1 Absolute Maximum Ratings EE 24 4 2 Electro optical Characteristics sessssseseseeeeeseeeene eene enne nnne 24 43 LED Backlight Diagrart ciere ete ene cs Erde eerie Nees 24 4 4 Brightness Top surface of LCD 24 uM DEI UE 25 4 6 Examples of LED Backlight Drivers eene 25 e G121C00PO00C G121CB1P00C REN KR 27 INDEX AN No G121C C 561E 1 SPECIFICATIONS 1 1 1 2 General The G121C is a very thin LCD module which incorporates a full dot matrix LCD panel and CMOS IC driver G121C can be used within a wide temperature range The built in LCD controller SED1335F also interfaces easily with an MPU This full dot configuratio
14. GND s t GND Ge Mee 06 3 ms min gt 5V e 06 GND H 1 ms min Em t 5V GND HV d GND t20ms t223ms t2 Initializing period of LCD controller Figure 8 Timing of setting the power supply and the signals to on and off 16 AN No G121C C 561E 3 5 Commands Table 5 Commands Code eu Purpose Command HEX Description Parameters Remarks RD WR AO D7 De Ds D4 D3 D2 Di Do Setting the SYSTEMSET 101010000004 40 initial operation P1 to P8 Note 1 System and the window Control SLEEP IN 101 0101001 1 53 Sleep Operation 0 DISPONOFF 101 0101100D 28 Display on oft P1 59 flashing screen Setting display SCROLL 10101000100 44 start address P1 to P10 Note 1 and the display area CSRFORM 101 01011101 sp Setting the shape of pi po thecursor etc Display GGRAMADR 101 01011100 sc Setting CG RAM P1 P2 Note 1 Control start address CD CD 4C Setting the cursor EPI pa 01001110 bs movement direction S Setting the scrolling HDOT SCR 101 01011010 5A position per dot in the P1 horizontal direction OVLAY 101 01011011 sg Disblayoverayng P1 mode CSRW 101 01000110 46 Setting cursor P1 P2 Note 1 Drawi ng address Control CSRR 101 01000111 47 Reading cursor P1 P2 Note 1 address MWRITE 101 01000010 42
15. a ex ee sev ped 24 ENEE EE 1 8 9 17 Segment drive waveform sessssesseresseessssessererreeeessessossosereeeressesssseeseseeeeesessessossesereees 10 Segment EE 8 9 EE 27 Storace BUrniddby 6i oiii EE 2 Storage temperature cccsccssssssssccecceccececceccecesessessnssnnssaeceeccesecceccsessessessessnsnaeeees 2 24 dree e 14 15 16 STEE 4 Ve 2 Vopr COBLFODOHQUI EE 8 10 Seiko Instruments Inc Head Office Components Sales Division 1 8 Nakase Mihama Ku Chiba shi Chiba 261 8507 Japan Phone 043 211 1216 FAX 043 211 8032 Seiko Instruments U S A Inc Electronic Components Division 2990 W Lomita Blvd Torrance Calif 90505 USA Phone 310 517 7770 FAX 310 517 8131 Seiko Instruments GmbH Siemensstrasse 9b 63263 Neu Isenburg Germany Phone 49 6102 297 122 FAX 49 6102 297 116 Seiko Instruments H K Ltd Sales Division 4 5 F Wyler Centre 2 200 Tai Lin Pai Road Kwai Chung N T Kowloon Hong Kong Phone 852 24218611 FAX 852 24805479 Seiko Instruments Taiwan Inc 4FL No 40 Sec 2 Min Chuan E Taipei Taiwan R O C Phone 886 2 563 5001 FAX 886 2 521 9519 Seiko Instruments Singapore Pte Ltd 2 Marsiling Lane Singapore 739144 Phone 65 2691370 FAX 65 2699729
16. addresses over 2000H When you define 65 or more customized character fonts max 256 characters on CGRAM and display them simultaneously you must map them onto VRAM addresses FOOOH through FFFFH Note that this corresponds to 1000H through 1FFFH in VRAM of the G121C Because all the character codes are assigned to CGRAM the built in CGROM cannot be used together with CGRAM LCD controller VRAM 0000H 0000H 1000H 1FFFH F000H FFFFH Figure 9 Display Data RAM Example of an Initial Setting C START POWER ON CLEAR FIRST Set the cursor address to the beginning of the frame memory corresponding to each layer and SYSTEM SET LAYER MEMORY write the space character code 20H character display or 00H graphics display with MWRITE uh CLEAR SECOND command ROLL LAYER MEMORY Refer to Display and memory for the exact memory area to be cleared HDOT SCR CSRW OVLAY CSR FORM DISP OFF DISP ON WRITE DISPLAY DATA 18 In the combination of characters and graphics Requirements 128 x 128 dots 1 screen driving method 1 128 duty First layer Character screen Second layer Graphics screen Character font 8 x 8 dots CG RAM unused e fosc 6 MHz Frame frequency 71 2 Hz Assigning display memory First layer Character screen Characters in the horizontal direction 128 8 16 Cha
17. cle of RD E signal while CS RD E H It doesn t unconditionally indicate the cycle of RD E signal Timing Chart gt RD E E trow M gt tawe WR R W X tans lt gt A0 CS tose toe gt gt Do to D7 F N WRITE A Y tacce tons Do to D7 READ 15 3 msec or more M 0 7 xVop 0 3xVop 2 Reset status 1 msec or more gt Figure 7 Reset AN No G121C C 561E Note It takes 3 msec max to stabilize the operation after Vpp H and RES gt H Inputting reset pulse resets the internal status of the LCD controller after powering on The width of the pulse input must be 1 msec or more The control signal for the LCD is cut off when in the reset status Consequently the LCD is driven by DC and the display quality deteriorates Therefore set INH to L to reset in the status in which DC is not applied to LCD The instructions from the CPU cannot be accepted during this period After resetting set the default values immediately in order to set the internal registers after resetting 3 3 Reset d RES 3 4 Setting the Power Supply and the Signals to On or OFF Set the power supply and the signals to on or off according to the following timing chart list to avoid malfunctions of the drive circuit and the LC panel Von RES Input signal INH 5V eue 06
18. ds out the data or the status flag from the LCD controller The data bus of LCD controller is set to the output status during L 68 series MPU Active H Enable clock input terminal of 68 series MPU WR 1 Input 80 series MPU Active L Strobe signal when 80 series MPU writes the data or the parameters into LCD controller LCD controller fetches the data bus signal at the WR rise edge 68 series MPU R W control signal input terminal of 68 series MPU R W H READ R W L WRITE SEL1 1 Input MPU interface can be switched by the combination of SEL1 and SEL2 and SEL2 1 Input can be connected directly to both 80 series MPU Z80 8085 etc data bus and 68 series MPU 6809 6802 data bus SEL1 SEL2 Interface A0 RD WR CS 0 0 80 series AO RD WR CS 1 0 68 series AO E RW CS 0 1 x x 1 1 x x x x x Prohibited Normally SEL1 and SEL2 are directly connected to either power supply VDD or VSS to prevent noise CS 1 Input Active L Inputs the chip select signal normally acquired by decoding the address bus signal when the MPU accesses the LCD controller 12 AN No G121C C 561E Table 4 Terminal Functions 2 Signal Q ty UO Functions A0 1 Input Normally connected to the least significant bit of MPU address The data bu
19. ensation to prevent the transparent electrodes from being damaged Storage Store the module in a dark place where the temperature is 25 C 10 C and the relative humidity is below 65 Do not store the module near organic solvents or corrosive gases Keep the module including accessories safe from vibration mechanical shock and external pressure Black or white air bubbles may be produced if the module is stored for a long time in the lower temperature or mechanical shocks are applied onto the module Cleaning Do not wipe the polarizer with a dry cloth as it may scratch the surface Wipe the module gently with a soft cloth soaked with a petroleum benzine Do not use ketonic ketone solvents ketone and acetone or aromatic solvents toluene and xylene as they may damage the polarizer Index AN No G121C C 561E Adjustment terminal for liquid crystal driving voltage sess 7 Allowable dissipation iine rer er eeneg eren vests 24 lise 1 4 11 Bias yoltage EE 8 11 E E EE 8 IEN el GE 24 25 26 OCG RAM WEE 18 19 CO RON E 1 18 Cleaning erinan aen naa e E E OA E a e ER S ea 27 Commands TC 13 14 15 17 18 20 Common driye wavefoEm EE 9 COTM OY CIETY C1 oe dos sac dee ts ee 8 9 CORNEAS GE EE 4 5 Corrent consump E 3 Definition of angle rnaar ree rrr E E E EE 5 Defrmition of COntrbAasb erret rerit hee beoe t EEEE E ESETRE EEEE R Ee EEEE 5 Definitiomwof res
20. gnal to make the liquid crystal drive waveform AC M There are six voltage levels Va to Vf in the waveform Table 1 shows the description of each level Note that FLM signal and CL1 signal are input from LCD controller After CL1 is input 128 times the next FLM is input and the same operation is repeated Table 1 Description of each voltage level Va Common segment selection level Vb Common non selection level Ve Segment non selection level Vd Segment non selection level Ve Common non selection level Vi Common segment selection level INH signal and YDIS signal from the LCD controller control COM output When INH signal or YDIS signal is set to L Vais output to COM output regardless of the contents of the shift register and M signal Segment Driver HITACHI HD66204TF The segment driver is an 80 drive output CMOS IC Two segment drivers are used in the G121C and operate as follows 4 bit input display data is read sequentially into the internal register at the display data shift clock CL2 fall edge trigger This display data and CL2 signal are input from the LCD controller Because a chip enable function is built into the segment driver when the 80 bit 9 2 5 AN No G121C C 561E display data is input to SD1 the next data is automatically sent to segment driver 2 The two segment drivers read 128 bit display data Thus the input display data in the internal register is latched
21. ightness Center part of LCD panel Bp 10 d B i Measurement conditions and measuring instruments a2 25 r e 30 to 8596 RH e IF 100mA e fFLM 71 4Hz e VLC Optimum LCD driving voltage e Display OFF All display data L The measurements must be made after LED lights for 30 minutes Measuring instrument BM 7 TOPCON 24 4 5 4 6 1 AN No G121C C 561E Lifetime Item Measurement conditions Standard Unit RC Ta 25 C 10 C Lifetime Ic 100mA 50 000 or more hrs Definition of lifetime Time required for the brightness to be reduced to 1 2 of the initial brightness Examples of LED Backlight Drivers Circuit Example1 Figure 14 shows an example of a basic LED backlight driver LEDA _ R2339 21 4W Vin 5V eg LEDC G121C Figure 14 LED Backlight Driver Example 1 The resistance R in the figure is a limiting resistor for the LED forward current and determines the current that flows into the LEDs The forward current is temperature dependent Therefore the current must be reduced especially at higher temperatures Refer to Forward Current reduction characteristics in 4 1 for the temperature dependency Because the operating temperature range of the G121C is 20 C through 70 C the limiting resistance must be determined so that the forward current is 50 mA or less at 70 C Table 6 shows forward voltage VF of LED backlight at each temperature
22. n allows a wide variety of patterns to be displayed depending upon the input data There is no distortion or displacement in the display because the display position is the point on the matrix where the transparent electrodes intersect Features G121C00P00C G121CB1PO00C 128 x 128 full dot matrix configuration 1 128 duty 1 10 bias Built in LCD controller SED1335F Selectable interface between an 80 series MPU and a 68 series MPU 8KB internal display data RAM Built in 160 character 5 x 7 dots CGROM STN LCD with a wide operating temperature range and gray mode Positive display Display data H Display ON blue display color Display data L Display OFF gray background color G121CO00P00C e Dual power supplies VDD 5V VLC 24V LCD driving voltage Reflective Weight Approximately 64g G121CBIPOOC e Triple power supplies VDD 5V VLC 24V LCD driving voltage LEDA LED anode Transflective Built in LED backlight color yellow green Weight Approximately 81g 1 3 1 4 AN No G121C C 561E Absolute Maximum Ratings excluding LED backlight Vss 0V Item Symbol Conditions Min Max Unit VoD 0 3 7 0 V Power supply voltage Vic Vpp 30 0 VDD V Vo Vo gt Vic Vpp 30 0 VDD V Input voltage VIN 0 3 Vop 0 3 V Operating temperature Topr lt 65 RH 20 70 C Storage temperature Tstg 30 80 C lt 48 hr
23. ponse E 5 Definition of viewing angles nennen enne EEEO NE EEEa EREE ES 5 Display data RAM ssssessseeeeeeen eene REA EEEN SNEEN EERENS 1 8 18 Display data shift Clo 2e c eee ct rto etre eae Lira Le eta cba erede e E eode en eo iu 9 Display OnfOff E 7 Dot dimensio EE 2 Dot EE 2 Drive waveform E 9 De EE 24 25 26 Forward volbage EE 24 25 UI EE E 3 5 19 20 WO terminal FanctioE8 so eot P e ee ee Uber Oed eie tro sies 7 WATT TAZ Cesc ETT LETTER 7 16 18 AN No G121C C 561E Input Voltage t etna ct ctr ERR EET e euer 3 25 IR 1 12 13 24 LCD controller tte eee ete ect n eee eret denen 1 7 8 9 10 12 13 16 17 18 Se E 7 10 13 Mete iti e A 6 25 Limiting Yeelgbor i e eer ters e tte eee eee et deren eerte eer eee ux eye veda ete rv ean euer 25 EE 8 11 One common line timing signal 5 5 e ttane esee teet oe epp te REIR Peso Ree KAREK PEAS e Ede Ros 9 11 Otie frame timing signal ree e eee epe ete laa dee 9 11 Operating temperature e e tee erbes tes eb ten EE che COUR dE Decet devksancedgtdanvoenscadaeeeede 2 24 Operational amplifIGE x5 odere veo iere obese Eesen 10 11 Power supply voltage ed eec eet tereti tre eee est etate oda n reo eee Ue ee Ug 2 25 Forward current reduction characteristics eene 24 25 hern 7 16 Resistance division E 11 Response Oe TE 4 5 Reverse QUrrent za 5e eie n o E ie cete er veo tee dea ede teure Debe ee yv e v
24. racters in the vertical direction 128 8 16 Consequently the required memory size is 16 x 16 256 bytes Second layer Graphics screen Characters in the horizontal direction 128 8 16 Characters in the vertical direction 128 1 128 Consequently the required memory size is 16 x 128 2048 bytes Display and memory 0100H Second layer Graphics 2048 bytes 0000H First layer Character screen 256 bytes 08FFH 00FFH Figure 11 Display and memory 19 AN No G121C C 561E AN No G121C C 561E No Command Operation 1 POWER ON 2 WAIT FOR POWER SUPPLY Sets VDD 2 4 5V and waits more than 3 msec after completing TO BE STABILIZED external resetting 3 SYSTEM SET Initializes LCD controller C 40H P1 30H MO Internal CG ROM M1 No compensation in bit D6 CG RAM 32 characters MAX M2 Character font size in the Y direction 8 dots W S 1 screen driving method IV No compensation in the top line P2 87H FX Character field in the X direction 8 dots WF 2 frame AC drive P3 07H FY Character field in the Y direction 8 dots P4 OFH C R Characters in the X direction Number of addresses 16 characters line P5 49H TC R Total characters in the X direction Number of addresses 73 characters line fosc 6 MHz Frame frequency 71 2Hz P6 7FH L F Display lines in the Y direction 128 P7 10H AP Addresses in the X direction of virtual screen P8 00H
25. ristics 1 6 1 G121C00P00C 1 128 duty 1 10 bias feLmM 71 4Hz Vopr VDD Vo Item Sym Conditions Temp Min Typ Max Unit Remark 5 Ge Refer to Notes Viewing angle 02 2 0 25 C 50 Degree 1 and 2 Vopr 20 0V TTT 02 01 55 020 Contrast C 2 0 25 C 2 5 3 5 Note 3 Vopr 20 0V ton 9 0 150 240 0 25 C toff Vopr 20 0V 110 180 ton 0 0 1060 1700 Response time 2 0 10 C ms Note 4 toft Vopr 21 5V 500 800 ton 9 0 2860 4600 O 0 20 C toff Vopr 22 0V 780 1300 Measuring instrument Canon illuminometer LC 3S 1 6 2 G121CB1P00C 1 128 duty 1 10 bias feLmM 71 4Hz Vopr2 Vpp Vo backlight ON Item Sym Conditions Temp Min Typ Max Unit Remark 20 2 Gig Refer to Notes Viewing angle 02 2 0 25 C 30 Degree 1 and2 Vopr 20 0V 02 01 50 020 Contrast C O 0 25 C 2 0 2 4 Note 3 Vopr 20 0V ton 9 0 150 240 0 25 C toff Vopr 20 0V 110 180 ton 0 0 1060 1700 Response time 2 0 10 C ms Note 4 toft Vopr 21 5V 500 800 ton 9 0 2860 4600 0 20 C toff Vopr 22 0V 780 1300 Measuring instrument Canon illuminometer LC 3S Note 1 Definition of angle 0 and
26. s 20 85 RH SE lt 1000 hrs 20 65 9c RH Mechanical Characteristics Item Standard Dot configuration 128x128 dot ERE EIE ECH DEI Viewing area H x V mm 67 4x67 4 Active display area H x V mm 62 69x62 69 Dot dimensions H x V mm 0 46x0 46 Dot pitch H x V mm 0 49x0 49 Weight g G121C00P00C 75 max G121CB1P00C 100 max H Horizontal V Vertical T Thickness max AN No G121C C 561E 1 5 Electrical Characteristics excluding LED backlight Vop 5V 5 Vss 0V Ta 20 C to 70 C Item Symbol Conditions Min Typ Max Unit VDD 4 75 5 00 5 25 V Power supply voltage Vic Vpp 5V 24 5 24 0 23 5 V Vo Vo2Vic 23 0 5 0 V Input voltage High VIHC 0 8VDD VDD V CMOS Low Vic 0 0 2Vop V Input voltage High VIHT 0 5Vpp VDD V TTL Low Vur 0 0 2Vpp V Input voltage High VT 0 5Vpp 0 7VpD 0 8Vpp V RES Low VT 0 2Vpp 0 3Vpp 0 5Vpp V Outubveltaget High VoH loH 5 0MA 2 4 V Low VoL lo 5 0mA 0 4 V IDD Vpp 5V Ta 25 C 10 0 15 0 mA Current consumption Vo 15 0V ILc fru uz 71 4Hz 4 1 6 2 mA Frame frequency fFLM 71 4 Hz OD E Go Applied to SEL1 and SEL2 Applied to INH Ao CS RD WR and Do to Dr Applied to RES Applied to Do to D7 Display patterns Checkered patterns Display data shift clock frequency fcL2 6 0MHz AN No G121C C 561E 1 6 Optical Characte
27. s signal is identified by the combination of RD and WR or R W and E as shown in the following tables 80 series interface AO RD WR functions 0 0 1 Reads out the status flag 1 0 1 Reads out the data display data cursor address 0 1 0 Writes the data display data parameters 1 1 O0 Writes commands only codes 68 series interface RD WR AO E RW functions 0 1 1 Reads out the status flag 1 1 1 Reads out the data display data cursor address 0 1 0 Writes the data display data parameters 1 1 0 Writes commands only codes DO 8 UO Active H to Tristate input output terminal D7 8 bit bidirectional data bus Connected to 8 bit or 16 bit MPU data bus VDD 1 Power supply for logic circuit 5V Vss 1 GND 0V Vo 1 Adjustment terminal for liquid crystal driving voltage VLC 1 Power supply terminal for driving liquid crystal display 24V INH 1 Input When INH H the display is ON and when INH L the display is OFF LCD YDIS Controller LEDA 1 G121C00P00C NC G121CB1P00C LED backlight anode terminal LEDC 1 G121C00P00C NC G121CB1P00C LED backlight cathode terminal el AN No G121C C 561E 3 2 Timing Characteristics 3 2 1 Read Write Characteristics 80 series MPU Ta 20 C 70 C Vop 5 0V 5 Vss 0V Signal Item Symbol Min Typ Max Unit Address hold time tAH8 10 ns Address setup time taws 0 ns SS System cycle
28. s to 30 of the initial value Current consumption becomes three times the initial value Orientation deteriorates significantly The display malfunctions AN No G121C C 561E Unit mm 1 8 Dimensions General tolerance 0 5 86 0 325 79 5 0 3 3 25 8 0max 10 0 max 6 05 67 4 Viewing area 6 05 5 0max 7 0max J m 8 405 62 69 Active display area 8 405 1 2 0 2 3 0max 1 2 0 2 3 0max al 285 S TT TT NI 4 i d d Laer JEN i i oO 1 aS CH ol Up Uy M Se Ge S n m od HE OE S j i To i 2 E i c c A e e Sg 1 amp 8 E ni 2 22 e i GS E e 515 i 3 o E x H H SIS JH TH ji Y HE UM Z Z O A 22 0 1 00 15 x dE 8 e d 1 0 0 ZA S qx mRNA S NS 22 ai i E wi 1 U U N i i xD o xc 6 92 0 2 2 54x21 53 34 0 2 19 24 WW 8 825 T 79 5403 3 25 G121COO0POOC G121CB1P00C 19 82 2 110 9 046 0 03 gH I SS Ge SS ILU 5 i d T o Figure 2 Dimensions I O terminal functions No Sym Functions No Sym Functions 1 RES Reset signal input 11 D3 Data bus line gt AD 80 series MPU Read signal 12 Da Da
29. ta bus line 68 series MPU E clock 13 Ds Data bus line 3 WR 80 series MP Write signal 14 De Data bus line 68 series MP RW signal 15 D7 Data bus line 4 SEL2 Ge MAD DiS SNIIERINS 16 VDD Power supply for logic circuit 5V 80 68series MPU bus switching 17 Vss GND OV 5 SEL1 terminal Adjustment terminal for liquid AA 18 Vo i 6 CS Chip select input crystal driving voltage Identifying signal for data bus Power supply terminal for driving 7 AO 19 Vic ae signal liquid crystal display 24V 8 Do Data bus line 20 NH Display on off control terminal 9 D Data bus line 21 NC LEDA 2 10 De Data bus line 22 NC LEDC 1 After powering on DC voltage is not applied to LCD by setting INH L until the initialization of LCD controller is completed After DISP ON command is executed the display is set to on by setting INH H and set to off by setting INH L 2 G121C00P00C NC G121CB1P00C Power supply for LED backlight No 21 LEDA No 22 LEDC AN No G121C C 561E 2 CIRCUIT CONFIGURATION 2 1 Block Diagram G121C P C consists of an LCD controller display data RAM common drivers segment drivers a Vopr control circuit a bias voltage generator M generator and so forth Figure 3 shows the block diagram Ee RB WRCS AD VAO to VA12 VRD VWR VCE Display data VDO to VD7 SEL1 SEL2 Lop PAM controller Do to D7 Do to Ds
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