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Standard ICs LCD controller driver for dot matrix displays BU97701 / BU97702 The BU97701 and BU97702 are controller drivers used in dot matrix liquid crystal displays that display English-language characters, Japanese kana characters, and symbols. These products can be controlled by a 4-bit or an 8-bit MPU. All of the functions necessary to drive dot matrix displays are contained on a single chip, enabling liquid crystal displays to be configured with a small number of chips. These products are available in QFP-T80 (BU97701) and SQFP-T80 (BU97702) packages. *Applicationsdisplay systems for character displays Liquid crystal *Features 1) Can accommodate 5 x 7 and 5 x 10 dot matrix LCDs. 2) Equipped with an internal display data RAM of 80 x 8 bits; an expansion driver (BU9706KS) can be used to expand the display up to 80 characters. 3) Internal display data ROM of 12,000 bits 4) Diverse variety of functions includes display clear, cursor home, display on / off, display character blink, display shift, and others. *Absolute maximum ratings (Ta = 25C) Parameter Power supply voltage Power dissipation BU97701 BU97702 Symbol VDD Pd Topr Tstg Limits - 0.3 ~ + 7.0 9001 8002 - 20 ~ + 75 - 55 ~ + 125 Unit V mW C C Operating temperature Storage temperature 1 Reduced by 9.0mW for each increase in Ta of 1C over 25C (QFP-T80). 2 Reduced by 8.0mW for each increase in Ta of 1C over 25C (SQFP-T80). *Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol VDD Min. 4.5 Typ. -- Max. 5.5 Unit V *Model names Model Number BU97701-00 / BU97702-00 BU97701-01 / BU97702-01 BU97701-02 / BU97702-02 Built-in font ROM Ver.00 ROM Ver.01 ROM Ver.02 1 Standard ICs BU97701 / BU97702 *Block diagram COM16 COM15 COM14 COM13 COM12 COM11 COM10 SEG39 SEG40 COM9 COM8 COM7 COM6 COM5 COM4 COM3 COM2 COM1 DB7 DB6 DB5 DB4 DB3 42 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 41 DB2 SEG38 SEG37 SEG36 SEG35 SEG34 SEG33 SEG32 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Parallel dataserial data conversion 5 5 40-bit shift register 40-bit latch 40-bit segment driver Character generator RAM (CG RAM) 64 x 8 bits Timing generator 7 7 7 8 Character generator ROM (CG ROM) 1200 bits Cursor link control 8 8 16-bit shift register 16-bit common driver 7 Instruction decoder 8 Instruction register (IR) 8 7 8 Data register (IR) 8 Busy flag 40 39 38 Parallel I / F 37 36 35 34 33 32 31 30 29 28 27 26 25 DB1 DB0 E R/W RS D DF VDD CP LOAD V5 V4 V3 V2 V1 OSC2 Address counter 7 Display data RAM (DD RAM) 80 x 8 bits 1 SEG22 2 SEG21 3 SEG20 4 SEG19 5 SEG18 6 SEG17 7 SEG16 8 SEG15 9 SEG14 10 SEG13 11 SEG12 12 SEG11 13 SEG10 14 SEG9 15 SEG8 16 SEG7 17 SEG6 18 SEG5 19 SEG4 20 SEG3 21 SEG2 22 SEG1 23 VSS 24 OSC1 BU97701 (QFP-T80) 2 Standard ICs BU97701 / BU97702 COM16 COM15 COM14 COM13 COM12 COM11 COM10 *Pin assignments SEG40 61 SEG39 62 SEG38 63 SEG37 64 SEG36 65 SEG35 66 SEG34 67 SEG33 68 SEG32 69 SEG31 70 SEG30 71 SEG29 72 SEG28 73 SEG27 74 SEG26 75 SEG25 76 SEG24 77 SEG23 78 SEG22 79 SEG21 80 COM9 COM8 COM7 COM6 COM5 COM4 COM3 COM2 COM1 DB7 DB6 DB5 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 DB3 39 DB2 38 DB1 37 DB0 36 E 35 R / W 34 RS 33 D 32 DF DB4 31 VDD 30 CP 29 LOAD 28 V5 27 V4 26 V3 25 V2 24 V1 23 OSC2 22 OSC1 21 VSS SEG1 TOP VIEW BU97702 (SQFP-T80) 1 SEG20 2 SEG19 3 SEG18 4 SEG17 5 SEG16 6 SEG15 7 SEG14 8 SEG13 9 SEG12 10 11 12 13 14 15 16 17 18 19 20 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 3 Standard ICs BU97701 / BU97702 *Pin descriptions Pin No. Pin name Function Selects the register used to read / write instructions and data. If RS = 0 and R / W = 0: Instruction register If RS = 0 and R / W = 1: Busy flag and address counter If RS = 1: Data register Signal that selects the read or write operation. This sends and receives data between the BU97701-00 (BU97702) and host computer. R / W = 0: Write R / W = 1: Read Signal which enables reading / writing. Highest four bits of 3-state bi-directional bus. These send and receive data between the BU97701 (BU97702) and host MPU. These are not used with 4-bit operation. Lowest four bits of 3-state bi-directional bus. These send and receive data between the BU97701 (BU97702) and host MPU. Signal output which latches the serial data of the external segment driver. Signal output which shifts the serial data of the external segment driver. AC signal output of the LCD drive waveform. Outputs the data corresponding to the character pattern to an external segment register. 0: OFF data 1: ON data Commons: these are common drive signals. At 1 / 8 duty, COM9 to COM16 are de-selected waveforms. At 1 / 11 duty, COM12 to COM16 are de-selected waveforms. 36 (34) RS 37 (35) R/W 38 (36) 39 ~ 42 (37 ~ 40) 43 ~ 46 (41 ~ 44) 31 (29) 32 (30) 34 (32) 35 (33) 47 ~ 62 (45 ~ 60) 22 ~ 1 (20 ~ 1) 80 ~ 63 (80 ~ 61) 30 (28) 26 ~ 29 (24 ~ 27) 33, 23 (31, 21) 24, 25 (22, 23) E DB0 ~ DB3 DB4 ~ DB7 LOAD CP DF D COM1 ~ COM16 SEG1 ~ SEG40 V5 V1 ~ V4 VDD, VSS Segments: segment drive signals. LCD power supply LCD power supply for external driver. These must satisfy the following relationship: VDD V1 V2 V3 V4 V5 VSS Power supply pins; VDD = 5.0 10%, VSS = 0V When the internal clock is operating, the resistance is connected to these pins. When an external clock is operating, the clock is input to OSC1. (OSC2 is open.) OSC1, OSC2 The 97702 pin numbers are indicated within parentheses. 4 Standard ICs BU97701 / BU97702 *Input / output circuits VDD VDD PMOS E NMOS NMOS PMOS CP, LOAD, D, DF GND GND VDD VDD PMOS PMOS RS, R / W NMOS OSC1 NMOS NMOS NMOS PMOS PMOS PMOS OSC2 GND GND VDD PMOS DB0 ~ 7 PMOS NMOS VDD Data GND PMOS NMOS Enable GND 5 Standard ICs BU97701 / BU97702 *Electrical characteristics (unless otherwise noted, Ta = 25C, VDD = 5V, VSS = 0V) Parameter Input high level voltage 1 Input low level voltage 1 Input high level voltage 2 Input low level voltage 2 Output high level voltage 1 Output low level voltage 1 Output high level voltage 2 Output low level voltage 2 COM driver ON resistance SEG driver ON resistance Input current 1 Input current 2 Current dissipation External clock operating frequency External clock duty External clock rise time External clock fall time Internal clock oscillation frequency Enable cycle time Enable pulse width Enable rise / fall times Address setup time Address hold time Data setup time Data hold time (writing) Data delay time Data hold time (reading) CP cycle time CP pulse time CP rise / fall times D delay time LOAD pulse width CPLOAD time LOADCP time DF delay time Symbol VIH1 VIL1 VIH2 VIL2 VOH1 VOL1 VOH2 VOL2 RCOM RSEG IIN1 IIN2 IDD fIN fDuty tr tf fOSC tEC tEP tEr, tEf tAS tAH tDS tDH tDD1 tOH tCC tWH, tWL tCr, tCf tDD2 tWCP tCL tLC tDFD Min. 0.8 x VDD 0 2.2 -- VDD - 0.3 -- 2.4 -- -- -- -1 50 -- 125 45 -- -- 190 500 220 -- 40 10 60 10 -- 20 1800 800 -- -- 800 125 0 - 100 Typ. -- -- -- -- -- -- -- -- -- -- -- 125 350 250 50 -- -- 270 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Max. VDD 0.2 x VDD -- 0.8 -- 0.3 -- 0.4 20 30 1 250 600 350 55 200 200 350 -- -- 20 -- -- -- -- 250 -- -- -- 100 100 -- -- -- 100 Unit V V V V V V V V k k A A A kHz % ns ns kHz ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 IOH = - 0.625mA IOL = 0.625mA IOH = - 1.2mA IOL = 2.0mA Id = 50A Id = 50A VIN = 0 ~ VDD Note 1 VDD = 5V, VIN = 0V Note 2 Note 3 Note 4 Note 5 Note 6 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 -- -- -- -- Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 6 Standard ICs Note 1: Current does not include pull-up MOS current. BU97701 / BU97702 Note 2: External resistance oscillation or external clock input- * * * VDD = 5.0V, fOSC = fcp = 270kHz Note 3: External clock operating OSC1 External clock OSC2 Open Note 4: Applies to OSC1 pin tHW tLW VDD / 2 VDD / 2 VDD / 2 fDuty = tHW / (tHW + tLW) x 100 (%) Note 5: Applies to OSC1 pin 0.8VDD 0.8VDD 0.2VDD tr 0.2VDD tf Note 6: Internal oscillation caused by external resistance OSC1 Rf OSC2 7 Standard ICs BU97701 / BU97702 *Measurement circuits V 1 SW1 2 ANY INPUT COM OUT SEG OUT 16 40 1 SW4 2 A 1 2 3 4 VDD V1 V2 V3 V4 V5 OSC1 VSS SW6 EXPAND OUTPUT OSC2 100k 1 SW5 PG SW2 6 5 2 SW3 V GND SW1 1: ON resistance, output voltage measurement 2: Input voltage, input current measurement 1: ON resistance (in relation to VDD) measurement 2: ON resistance (in relation to V1) measurement SW3 ON: ON resistance measurement OFF: Current consumption measurement SW4 1: ON resistance (COM output) measurement 2: ON resistance (COM output) measurement SW2 3: ON resistance (in relation to V2) measurement 4: ON resistance (in relation to V3) measurement 5: ON resistance (in relation to V4) measurement 6: ON resistance (in relation to V5) measurement SW5 ON: Output voltage measurement OFF: Current consumption measurement SW6 1: Current consumption, ON resistance measurement 2: Input voltage measurement Fig. 1 DC characteristics measurement circuit ANY INPUT VDD (I / O) 2.4k 8 DB0 ~ 7 10k V5 OSC2 100k OSC1 VSS GND 50pF COM OUT SEG OUT 16 40 COM1 ~ 16 SEG1 ~ 40 PG 130pF EXPAND OUTPUT CP, LOAD, D, DF Fig. 2 Switching characteristics measurement circuit 8 Standard ICs BU97701 / BU97702 *Timing charts VIH2 RS VIL2 VIL2 VIH2 VIH2 R/W VIL2 tAS tEr E tEP tEr VIH2 VIH2 VIL2 tAH VIL2 tDS VIH2 VIH2 VIL2 tOH VIH2 VIH2 VIL2 tEC tDH Write data VIL2 tDD1 Read data VIL2 Fig. 3 Bus read / write timing tCr CP VOL1 tWH VOH1 D VOL1 tDD2 LOAD tCL tWLP VOH1 tLC VOH1 VOL1 tWL tCC tCf VOH1 VI H2 tDFD VOH1 DF VOL1 Fig. 4 Output to expansion driver 9 Standard ICs character codes and character patterns *Correspondence between00 Rohm Standard: ROM Ver. Upper bit Lower bit BU97701 / BU97702 0000 CGRAM 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 XXXX0000 (1) XXXX0001 (2) XXXX0010 (3) XXXX0011 (4) XXXX0100 (5) XXXX0101 (6) XXXX0110 (7) XXXX0111 (8) XXXX1000 (1) XXXX1001 (2) XXXX1010 (3) XXXX1011 (4) XXXX1100 (5) XXXX1101 (6) XXXX1110 (7) XXXX1111 (8) 10 Standard ICs Rohm Standard: ROM Ver. 01 Upper bit Lower bit BU97701 / BU97702 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 CGRAM XXXX0000 (1) XXXX0001 (2) XXXX0010 (3) XXXX0011 (4) XXXX0100 (5) XXXX0101 (6) XXXX0110 (7) XXXX0111 (8) XXXX1000 (1) XXXX1001 (2) XXXX1010 (3) XXXX1011 (4) XXXX1100 (5) XXXX1101 (6) XXXX1110 (7) XXXX1111 (8) 11 Standard ICs Rohm Standard: ROM Ver. 02 Upper bit Lower bit BU97701 / BU97702 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 CGRAM XXXX0000 (1) XXXX0001 (2) XXXX0010 (3) XXXX0011 (4) XXXX0100 (5) XXXX0101 (6) XXXX0110 (7) XXXX0111 (8) XXXX1000 (1) XXXX1001 (2) XXXX1010 (3) XXXX1011 (4) XXXX1100 (5) XXXX1101 (6) XXXX1110 (7) XXXX1111 (8) 12 Standard ICs BU97701 / BU97702 *Application circuit ,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,, LCD Panel (16Common x 120Segment) O40 BU9706KS COM16 COM1 SEG40 SEG1 D DI1 LOAD DF V2 V3 V5 DO20 DI21 DO40 CP DI1 BU9706KS LOAD DO20 DI21 DO40 CP GND BU97701 or BU97702 OSC1 DF LOAD CP V2 V3 V5 OSC2 100k The BU9706KS is a segment expansion LSI. Fig. 5 INPUT CURRENT (WITH Pull-up MOS): - Ip (uA) *Electrical characteristic curves 300 Ta = 25C 1500 Rf = 100k Ta = 25C Pin: V5 = "OPEN" 200 CIRCUIT CURRENT: IDD (uA) 1000 100 500 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 DF V2 V3 V5 7 POWER SUPPLY VOLTAGE: VDD (V) POWER SUPPLY VOLTAGE: VDD (V) Fig. 6 Input current vs. power supply voltage Fig. 7 Current consumption vs. power supply voltage O40 O1 O1 13 Standard ICs BU97701 / BU97702 *External dimensions (Units: mm) BU97701 BU97702 24.0 0.3 20.0 0.2 64 65 18.0 0.3 14.0 0.2 41 40 61 16.0 0.3 14.0 0.2 40 60 16.0 0.3 14.0 0.2 41 1.2 80 1 2.15 0.1 24 25 80 1 1.4 0.1 21 20 0.15 0.1 0.125 0.1 0.1 0.1 0.05 0.8 0.35 0.1 0.15 0.65 0.3 0.1 0.15 QFP-T80 SQFP-T80 14 0.5 |
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