16COM/40SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD

Transcription

1 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD INTRODUCTION is a dot matrix LCD driver & controller LSI which is fabricated by low power CMOS technology It can display, 2-line with 5 x 8 or 5 x dots format FUNCTIONS Character type dot matrix LCD driver & controller Internal driver: 6 common and 4 segment signal output Easy interface with 4-bit or 8-bit MPU Display character pattern : 5 x 8 dots format (24 kinds), 5 x dots format (32 kinds) The special character pattern can be programmable by Character Generator RAM directly A customer character pattern can be programmable by mask option It can drive a maximum 8 characters by using the S6A65 or S6A267 externally Various instruction functions Automatic power on reset FEATURES Internal Memory Character Generator ROM (CGROM):,8 bits (24 characters x 5 x 8 dot) & ( 32 characters x 5 x dot) Character Generator RAM (CGRAM): 64 8 bits (8 characters 5 8 dot) Display Data RAM (DDRAM): 8 x 8 bits (8 characters max) Low Power Operation Power supply voltage range: 27 to 55V (V DD ) LCD drive voltage range: 3 to 3V (V DD V5) CMOS process Programmable duty cycle: /8, /, /6 Internal oscillator with an external resistor Low power consumption 8 QFP or bare chip available

2 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Precautions for Light Light has characteristics to move electrons in the integrated circuitry of semiconductors, therefore may change the characteristics of semiconductor devices when irradiated with light Consequently, the users of the packages which may expose chips to external light such as COB, COG, TCP and COF must consider effective methods to block out light from reaching the IC on all parts of the surface area, the top, bottom and the sides of the chip Follow the precautions below when using the products Consider and verify the protection of penetrating light to the IC at substrate (board or glass) or product design stage 2 Always test and inspect products under the environment with no penetration of light 2

3 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD BLOCK DIAGRAM GND V V2 V3 V4 V5 Parallel to Serial Data Conversion Circuit 5 5 Busy Flag Character Generator ROM (CGROM) 8 bits Character Generator RAM (CGRAM) 52 bits Cursor & Blink Controller R/W RS E DB- DB3 DB4- DB7 Input/ Output Buffer 8 8 Data Register (DR) Instruction Register (IR) Instruction Decoder (ID) Display Data RAM (DDRAM) 8x8 bits 4-bit Shift Register 4-bit Latch Circuit Segment Driver 6 S-S4 D 7 7 Address Counter 6-bit Shift Register Common Driver 6 C-C6 OSC OSC2 Timing Generator Circuit CLK CLK2 M Figure Block Diagram 3

4 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD 4 PIN CONFIGURATION S38 S37 S36 S35 S34 S33 S32 S3 S3 S29 S28 S27 S26 S25 S24 S S39 S4 C6 C5 C4 C3 C2 C C C9 C8 C7 C6 C5 C4 C3 C2 C DB7 DB6 DB5 DB4 DB3 DB S22 S2 S2 S9 S8 S7 S6 S5 S4 S3 S2 S S S9 S8 S7 S6 S5 S4 S3 S2 S GND OSC DB DB E R/W RS D M CLK2 CLK V5 V4 V3 V2 V OSC2 Figure 2 Pin Configuration

5 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD PAD CONFIGURATION S22 S2 S2 S9 S8 S7 S6 S5 S4 S3 S2 S S S9 S8 S7 S6 S5 S4 S3 S2 S GND OSC Y (, ) X Chip size: Pad size: Unit: µm OSC2 V V2 V3 V4 V5 CLK CLK2 M D RS R/W E DB DB S23 S24 S25 S26 S27 S28 S29 S3 S3 S32 S33 S34 S35 S36 S37 S38 S39 S4 C6 C5 C4 C3 C2 C C C9 C8 C7 C6 C5 C4 C3 C2 C DB7 DB6 DB5 DB4 DB3 DB2 Figure 3 Pad Configuration 5

6 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD PAD CENTER COORDINATES Table Pad Center Coordinates [Unit: um] PAD PAD COORDINATE PAD PAD COORDINATE PAD PAD COORDINATE NUM NAME X Y NUM NAME X Y NUM NAME X Y S V C S V C S V C S CLK C S CLK C S C S M C S D C S RS S S R/W S S E S S DB S S DB S S DB S S DB S S DB S S DB S S DB S S DB S S C S S C S S C S GND C S OSC C S OSC C S V C S V C

7 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD PIN DESCRIPTION Table 2 Pin Description PIN No I/O NAME DESCRIPTION INTERFACE V DD 33 Supply For logical circuit (+3V ±%,+5V ±%) Power Supply GND 23 Voltage V (GND) V - V Bias voltage level for LCD driving S - S4-22, 63-8 O Segment output Segment signal output for LCD drive LCD C - C O Common output Common signal output for LCD drive LCD OSC 24 I Oscillator When use internal oscillator, connect external Rf resistor If external clock is used, connect it to OSC External Resistor/ Oscillator OSC2 25 O Oscillator OSC CLK 3 O Extension driver Latch clock CLK2 32 O Extension driver Shift clock M 34 O Alternated signal for LCD driver output D 35 O Display data interface extension driver latch clock extension driver shift clock Outputs the alternating signal to convert LCD driver waveform to AC Outputs extension driver data (the 4th dot's data) RS 36 I Register select Used as register selection input When RS = "High", Data register is selected When RS = "Low", Instruction register is selected R/W 37 I Read/Write Used as read/write selection input When R/W = "High", read operation When R/W = "Low", write operation Extension driver Extension driver Extension driver MPU MPU E 38 I Read/write enable Read/write enable signal MPU DB- DB3 DB4- DB O Data bus -7 When 8-bit bus mode, used as low order bi-directional data bus During 4-bit bus mode open these pins When 8-bit bus mode, used as high order bi-directional data bus In case of 4-bit bus mode, used as both high and low order DB7 is used for Busy Flag output MPU MPU 7

8 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD FUNCTION DESCRIPTION System Interface This chip has all two kinds of interface type with MPU : 4-bit bus and 8-bit bus 4-bit bus and 8-bit bus is selected by DL bit in the instruction register During read or write operation, two 8-bit registers are used one is data register (DR), the other is instruction register(ir) The data register(dr) is used as temporary data storage place for being written into or read from DDRAM/CGRAM, target RAM is selected by RAM address setting instruction Each internal operation, reading from or writing into RAM, is done automatically So to speak, after MPU reads DR data, the data in the next DDRAM/CGRAM address is transferred into DR automatically Also after MPU writes data to DR, the data in DR is transferred into DDRAM/CGRAM automatically The instruction register (IR) is used only to store instruction code transferred from MPU MPU cannot use it to read instruction data To select register, use RS input pin in 4-bit/8-bit bus mode Table 3 Various Kinds of Operations according to RS and R/W Bits RS R/W Operation L L Instruction Write operation (MPU writes Instruction code into IR) L H Read Busy Flag (DB7) and address counter (DB - DB6) H L Data Write operation (MPU writes data into DR) H H Data Read operation (MPU reads data from DR) Busy Flag (BF) When BF = "High", it indicates that the internal operation is being processed So during this time the next instruction cannot be accepted BF can be read, when RS = Low and R/W = High (Read Instruction Operation), through DB7 port Before executing the next instruction, be sure that BF is not High Address Counter (AC) Address Counter(AC) stores DDRAM/CGRAM address, transferred from IR After writing into (reading from) DDRAM/CGRAM, AC is automatically increased (decreased) by When RS = "Low" and R/W = "High", AC can be read through DB - DB6 ports 8

9 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Display Data RAM (DDRAM) DDRAM stores display data of maximum 8 x 8 bits (8 characters) DDRAM address is set in the address counter (AC) as a hexadecimal number (refer to Figure4) MSB AC6 AC5 AC4 AC3 AC2 AC AC LSB ) -line Display Figure 4 DDRAM Address In case of line display, the address range of DDRAM is H - 4FH Extension driver will be used Figure 5 shows the example that 4 segment extension driver is added Display position COM COM SEG SEG A B C D E F SEG Extension driver (4 SEG) SEG4 SEG Extension driver (4 SEG) SEG4 DDRAM Address COM COM SEG SEG A B C D E F SEG Extension driver (4 SEG) SEG4 SEG Extension driver (4 SEG) SEG4 (After Shift Left) 8 COM COM8 4F SEG SEG A B C D E F SEG Extension driver (4 SEG) SEG4 SEG Extension driver (4 SEG) SEG4 (After Shift Right) Figure 5 -line x 24 Character Display with 4 Segment Extension Driver 9

10 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD 2) 2-line Display In case of 2 line display, the address range of DDRAM is H - 27H, 4H - 67H Extension driver will be used Figure 3 shows the example that 4 segment extension driver is added COM COM8 COM9 COM A B C D E F 7 Display position DDRAM Address A 4B 4C 4D 4E 4F SEG SEG4 SEG Extension driver (4 SEG) SEG4 SEG Extension driver (4 SEG) SEG4 COM COM A B C D E F COM9 COM A 4B 4C 4D 4E 4F SEG SEG4 SEG Extension driver (4 SEG) SEG4 SEG Extension driver (4 SEG) SEG4 (After Shift Left) 58 COM COM A B C D E F COM9 COM A 4B 4C 4D 4E 4F SEG SEG4 SEG Extension driver (4 SEG) SEG4 SEG Extension driver (4 SEG) SEG4 (After Shift Right) Figure 6 2-line x 24 Character Display with 4 Segment Extension Driver

11 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD CGROM (Character Generator ROM) CGROM has a 5 x 8 dots 24 characters pattern and a 5 x dots 32 characters pattern CGROM has 24 character patterns of 5 x 8 dots, and 32 character patterns of 5 x dots CGRAM (Character Generator RAM) CGRAM has up to 5 8 dot, 8 characters By writing font data to CGRAM, user defined characters can be used Timing Generation Circuit Timing generation circuit generates clock signals for the internal operations LCD Driver Circuit LCD Driver circuit has 6 common and 4 segment signals for LCD driving Data from CGRAM/CGROM is transferred to 4 bit segment latch serially, and then it is stored to 4 bit shift latch When each common is selected by 6 bit common register, segment data also output through segment driver from 4 bit segment latch In case of -line display mode, COM COM8 have /8 duty or COM COM have /duty, and in 2-line mode, COM COM6 have /6 duty ratio Cursor/Blink Control Circuit It controls cursor/blink ON/OFF at cursor position Table 4 Relationship between Character Code (DDRAM) and Character Pattern (CGRAM)

12 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Character Code (DDRAM data) CGRAM Address CGRAM Data Pattern D7 D6 D5 D4 D3 D2 D D A5 A4 A3 A2 A A P7 P6 P5 P4 P3 P2 P P number x x x x x x x x Pattern Pattern 8 2

13 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD INSTRUCTION DESCRIPTION OUTLINE To overcome the speed difference between internal clock of and MPU clock, performs internal operation by storing control information to IR or DR The internal operation is determined according to the signal from MPU, composed of read/write and data bus Instruction can be divided largely four kinds, () function set instructions (set display methods, set data length, etc) (2) Address set instructions to internal RAM (3) Data transfer instructions with internal RAM (4) Others The address of internal RAM is automatically increased or decreased by NOTE During internal operation, Busy Flag (DB7) is read High Busy Flag check must precede the next instruction When an MPU program with checking the Busy Flag (DB7) is made, it must be necessary /2 fosc for executing the next instruction by the falling edge of the 'E' signal after the Busy Flag (DB7) goes to "LOW" CONTENTS Clear Display RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB Clear all the display data by writing "2H" (space code) to all DDRAM address, and set DDRAM address to "H" into AC (address counter) Return cursor to the original status, namely, bring the cursor to the left edge on first line of the display Make entry mode increment (I/D = "") Return Home RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB Return Home is cursor return home instruction Set DDRAM address to "H" into the address counter Return cursor to its original site and return display to its original status, if shifted Contents of DDRAM does not change 3

14 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Entry Mode Set RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB I/D SH Set the moving direction of cursor and display I/D : Increment/decrement of DDRAM address (cursor or blink) When I/D = "High", cursor/blink moves to right and DDRAM address is increased by When I/D = "Low", cursor/blink moves to left and DDRAM address is decreased by * CGRAM operates the same as DDRAM, when read from or write to CGRAM SH: Shift of entire display When DDRAM read (CGRAM read/write) operation or SH = "Low", shift of entire display is not performed If SH = "High" and DDRAM write operation, shift of entire display is performed according to I/D value (I/D = "" : shift left, I/D = "" : shift right) Display ON/OFF Control RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB D C B Control display/cursor/blink ON/OFF bit register D : Display ON/OFF Control Bit When D = "High", entire display is turned on When D = "Low", display is turned off, but display data is remained in DDRAM C : Cursor ON/OFF Control Bit When C = "High", cursor is turned on When C = "Low", cursor is disappeared in current display, but I/D register remains its data B : Cursor Blink ON/OFF Control Bit When B = "High", cursor blink is on, that performs alternate between all the high data and display character at the cursor position When B = "Low", blink is off Cursor or Display Shift RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB S/C R/L Shifting of right/left cursor position or display without writing or reading of display data This instruction is used to correct or search display data (Refer to table 5) During 2-line mode display, cursor moves to the 2nd line after the 4th digit of the st line Note that display shift is performed simultaneously in all the lines When displayed data is shifted repeatedly, each line is shifted individually When display shift is performed, the contents of the address counter are not changed 4

15 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Table 5 Shift Patterns According to S/C and R/L Bits S/C R/L Operation Shift cursor to the left, AC is decreased by Shift cursor to the right, AC is increased by Shift all the display to the left, cursor moves according to the display Shift all the display to the right, cursor moves according to the display Function Set RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB DL N F DL : Interface Data Length Control Bit When DL = "High", it means 8-bit bus mode with MPU When DL = "Low", it means 4-bit bus mode with MPU So to speak, DL is a signal to select 8-bit or 4-bit bus mode When 4-bit bus mode, it needs to transfer 4-bit data by two times N : Display Line Number Control Bit When N = "Low", it means -line display mode When N = "High", 2-line display mode is set F : Display Font Type Control Bit When F = "Low", it means 5 8 dots format display mode When F = "High", 5 dots format display mode Set CGRAM Address RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB AC5 AC4 AC3 AC2 AC AC Set CGRAM address to AC This instruction makes CGRAM data available from MPU Set DDRAM Address RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB AC6 AC5 AC4 AC3 AC2 AC AC Set DDRAM address to AC This instruction makes DDRAM data available from MPU When -line display mode (N = ), DDRAM address is from "H" to "4FH" In 2-line display mode (N = ), DDRAM address in the st line is from "H" to "27H", and DDRAM address in the 2nd line is from "4H" to "67H" Read Busy Flag & Address RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB BF AC6 AC5 AC4 AC3 AC2 AC AC This instruction shows whether is in internal operation or not If the resultant BF is High, it means the internal operation is in progress and you have to wait until BF to be Low, and then the next instruction can be performed In this instruction you can read also the value of address counter 5

16 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Write Data to RAM RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB D7 D6 D5 D4 D3 D2 D D Write binary 8-bit data to DDRAM/CGRAM The selection of RAM from DDRAM, CGRAM, is set by the previous address set instruction (DDRAM address set, CGRAM address set) RAM set instruction can also determine the AC direction to RAM After write operation, the address is automatically increased/decreased by, according to the entry mode Read Data from RAM RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB D7 D6 D5 D4 D3 D2 D D Read binary 8-bit data from DDRAM/CGRAM The selection of RAM is set by the previous address set instruction If address set instruction of RAM is not performed before this instruction, the data that read first is invalid, because the direction of AC is not determined If you read RAM data several times without RAM address set instruction before read operation, you can get correct RAM data from the second, but the first data would be incorrect, because there is no time margin to transfer RAM data In case of DDRAM read operation, cursor shift instruction plays the same role as DDRAM address set instruction : it also transfers RAM data to output data register After read operation address counter is automatically increased/decreased by according to the entry mode After CGRAM read operation, display shift may not be executed correctly NOTE In case of RAM write operation, after this AC is increased/decreased by like reading operation In this time, AC indicates the next address position, but you can read only the previous data by read instruction 6

17 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Table 6 Instruction Table Instruction Instruction Code Description Execution RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB Instruction Code time(fsoc=27) Clear Display Write "2H" to DDRAM and set DDRAM address to "H" from AC Return Home X Set DDRAM address to "H" from AC and return cursor to its original position if shifted The contents of DDRAM are not changed 53ms 53ms Entry Mode Set Display ON/OFF Control Cursor or Display Shift I/D SH Assign cursor moving direction and make shift of entire display enable D C B Set display(d), cursor(c), and blinking of cursor(b) on/off control bit S/C R/L X X Set cursor moving and display shift control bit, and the direction, without changing DDRAM data 39µs 39µs 39µs Function Set DL N F X X Set interface data length (DL : 4-bit/8-bit), numbers of display line (N : -line/2-line), display font type (F : 5 X 8 dots/ 5 X dots) 39µs Set CGRAM Address Set DDRAM Address Read Busy Flag and Address Write Data to RAM Read Data from RAM AC5 AC4 AC3 AC2 AC AC Set CGRAM address in address counter AC6 AC5 AC4 AC3 AC2 AC AC Set DDRAM address in address counter BF AC6 AC5 AC4 AC3 AC2 AC AC Whether during internal operation or not can be known by reading BF The contents of address counter can also be read D7 D6 D5 D4 D3 D2 D D Write data into internal RAM (DDRAM/CGRAM) D7 D6 D5 D4 D3 D2 D D Read data from internal RAM (DDRAM/CGRAM) 39µs 39µs µs 43µs 43µs NOTE: When an MPU program with checking the Busy Flag (DB7) is made, it must be necessary /2 fosc is necessary for executing the next instruction by the falling edge of the 'E' signal after the Busy Flag (DB7) goes to "LOW" 7

18 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD INTERFACE WITH MPU Interface with 8-bit MPU When interfacing data length is 8-bit, transfer is performed at a time through 8 ports, from DB to DB7 Example of timing sequence is shown below RS R/W E Internal signal Internal Operation DB7 DATA Busy Busy No Busy DATA Instruction Busy Flag Check Busy Flag Check Busy Flag Check Instruction Figure 7 Example of 8-bit Bus Mode Timing Diagram 8

19 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Interface with 4-bit MPU When interfacing data length is 4-bit, only 4 ports, from DB4 to DB7, are used as data bus At first higher 4-bit (in case of 8-bit bus mode, the contents of DB4 - DB7) are transferred, and then lower 4-bit (in case of 8-bit bus mode, the contents of DB - DB3) are transferred So transfer is performed by two times Busy Flag outputs "High" after the second transfer are ended Example of timing sequence is shown below RS R/W E Internal signal DB7 D3 Internal Operation No D7 AC3 Busy AC3 D7 D3 Busy Instruction Busy Flag Check Busy Flag Check Instruction Figure 8 Example of 4-bit Bus Mode Timing Diagram 9

20 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD APPLICATION INFORMATION ACCORDING TO LCD PANEL LCD Panel: 8 Character -line Character format; 5 7 dots + -cursor line (/4 bias, /8 duty) C C7 C8 S S S38 S39 S4 LCD Panel: 8 Character -line Character Format; 5 dots + cursor line (/4 bias, / duty) C C C S S S38 S39 S4 2

21 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD LCD Panel: 8 Character 2-line Character Format; 5 7 dots + cursor line (/5 bias, /6 duty) C C7 C8 C9 C5 C6 S S S38 S39 S4 2

22 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD LCD Panel: 6 Character -line Character Format; 5 7 dots + cursor line (/5 bias, /6 duty) C C7 C8 S S S39 S4 C9 C6 22

23 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD LCD Panel: 4 Character 2-line Character Format; 5 7 dots + cursor line (/4 bias, /8 duty) S S S8 S9 S2 C C7 C8 S2 S3 S38 S39 S4 23

24 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD APPLICATION CIRCUIT Figure 9 Application Circuit LCD Panel C-C6 S-S4 D OSC OSC2 DL FCS SHL SHL2 VSS SC-S4C S6A65 DL2 DL DR2 CL CL2 M V6 V5 V4 V3 V2 V VEE DL FCS SHL SHL2 VSS SC-S4C S6A65 DL2 DL DR2 CL CL2 M V6 V5 V4 V3 V2 V VEE DL FCS SHL SHL2 VSS SC-S4C S6A65 DL2 DL DR2 CL CL2 M V6 V5 V4 V3 V2 V VEE VSS M CLK CLK2 V V2 V3 V4 V5 DB-DB7 To MPU GND or Other voltage V V2 V3 V4 V5 VLCD (/5 bias) NOTE: When S6A65 is externally connected to the, you can increase the number of display digits up to 8 characters BIAS VOLTAGE DIVIDE CIRCUIT R R R R GND or Other voltage V V2 V3 V4 V5 R R R R R GND or Other voltage V V2 V3 V4 V5 Figure /4 bias, /8 or / duty Figure /5 bias, /6 duty 24

25 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD INITIALIZING When the power is turned on, is initialized automatically by power on reset circuit During the initialization, the following instructions are executed, and BF(Busy Flag) is kept "High"(busy state) to the end of initialization () Display Clear instruction: Write "2H" to all DDRAM (2) Set Functions instruction DL = : 8-bit bus mode N = : 2-line display mode F = : 5 X 8 font type (3) Control Display ON/OFF instruction D = : Display OFF C = : Cursor OFF B = : Blink OFF (4) Set Entry Mode instruction I/D = : Increment by SH = : No entire display shift FRAME FREQUENCY Programmable Driving Method by the same font mask option: Display waveform A-Type, B-Type -line selection period V COM V4 V5 Figure 2 /8 Duty Cycle (A-Type Waveform) V COM V4 V5 Frame Frame Figure 3 /8 Duty Cycle (B-Type Waveform) Line selection period One Frame Frame frequency = 4 clocks = 4 x 8 x 37µs = 85 µs = 9 ms ( clock = 37 µs, fosc = 27kHz) = /9ms = 843Hz 25

26 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD -line selection period V COM V4 V5 Figure 4 / Duty Cycle (A-Type Waveform) V COM V4 V5 Frame Frame Figure 5 / Duty Cycle (B-Type Waveform) Line selection period One Frame Frame frequency = 4 clocks = 4 x x 37µs = 63µs = 63ms ( clock = 37µs, fosc = 27kHz) = /63 ms = 64 Hz 26

27 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD -line selection period V COM V4 V5 Figure 6 /6 Duty Cycle (A-Type Waveform) V COM V4 V5 Frame Frame Figure 7 /6 Duty Cycle (B-Type Waveform) Line selection period One Frame Frame frequency = 2 clocks = 2 x 6 x 37µs = 85 µs = 9 ms ( clock = 37µs, fosc = 27kHz) = /9ms = 843Hz 27

28 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD INITIALIZING BY INSTRUCTION 8-bit Interface Mode (Condition: f OSC = 27 khz) Power On Wait for more than 3ms after rises to 45 V Wait for more than 4ms after rises to 27 V Function Set N -line mode 2-line mode RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB N F X X F Display off Display on Wait for more than 39 µs Display ON/OFF Control D Display off Display on RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB D C B C Cursor off Cursor on Wait for more than 39 µs B Blink off Blink on Display Clear RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB Wait for more than 53 ms Entry Mode Set I/D Decrement mode Increment mode RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB I/D SH SH Entire shift off Entire shift on Initialization End 28

29 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD 4-bit Interface Mode (Condition: f OSC = 27 khz) Power On Wait for more than 3ms after rises to 45V Wait for more than 4ms after rises to 27V Function Set (4-bit mode chage) RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB DL 4-bit mode 8-bit mode DL x x x x Wait for more than 39 µs N -line mode 2-line mode Function Set (display mode set) F Display off Display on x x x x N F x x x x x x Wait for more than 39 µs Display ON/OFF Control D Display off Display on RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB x x x x C Cursor off Cursor on D C B x x x x Wait for more than 39 µs B Blink off Blink on Display Clear RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB x x x x x x x x Wait for more than 53 µs Entry Mode Set RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB DB I/D Decrement mode Increment mode I/D SH x x x x x x x x SH Entire shift off Entire shift on Initialization End 29

30 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD MAXIMUM ABSOLUTE LIMIT Maximum Absolute Power Ratings Characteristic Symbol Unit Value Power Supply Voltage V DD V -3 to +7 Operating Voltage V LCD V V DD -5 to V DD +3 Input Voltage V IN V -3 to V DD + 3 NOTE: Voltage greater than above may damage the circuit (V DD V V2 V3 V4 V5) Temperature Characteristics Characteristic Symbol Unit Value Operating Temperature T OPR C -3 to +85 Storage Temperature T STG C -55 to +25 3

31 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD ELECTRICAL CHARACTERISTICS DC Characteristics (V DD = 45V to 55V, T A = -3 to +85 C) Characteristic Symbol Condition Min Typ Max Unit Operating Voltage V DD V Operating Current I DD Internal oscillation or external clock (V DD = 5V, fosc = 27kHz) 35 6 ma Input Voltage () V IH 22 V DD V (except OSC) V IL -3 6 Input Voltage (2) V IH2 V DD - V DD V (OSC) V IL2-2 Output Voltage () V OH I OH = -25mA 24 V (DB to DB7) V OL I OL = 2mA - 4 Output Voltage (2) V OH2 I O = -4µA 9V DD V (except DB to DB7) V OL2 I O = 4µA V DD Voltage Drop Vd COM I O = ±ma V Vd SEG Input Leakage Current I LKG V IN = V to V DD - µa Input Low Current I IL V IN = V, V DD = 5V (pull up) Internal Clock (external Rf) f OSC Rf = 9kΩ ± 2% (V DD = 5V) khz External Clock f OSC khz duty % t R, t F 2 µa LCD Driving Voltage V LCD V DD -V5 (/5, /4 bias) 3 3 V 3

32 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD DC Characteristics (V DD = 27V to 45V, T A = -3 to +85 C) Characteristic Symbol Condition Min Typ Max Unit Operating Voltage V DD V Operating Current I DD Internal oscillation or external clock (V DD = 3V, fosc = 27kHz) 5 3 ma Input Voltage () V IH 7 V DD V DD V (except OSC) V IL Input Voltage (2) V IH2 7V DD V DD V (OSC) V IL2 2 V DD Output Voltage () V OH I OH = -ma 75 V DD V (DB to DB7) V OL I OL = ma 2 V DD Output Voltage (2) V OH2 I O = -4µA 8V DD V (except DB to DB7) V OL2 I O = 4µA 2V DD Voltage Drop Vd COM I O = ± ma V Vd SEG Input Leakage Current I LKG V IN = V V DD - µa Input Low Current I IL V IN = V, V DD = 3V (pull up) Internal Clock (external Rf) f OSC Rf = 75kΩ ± 2% (V DD = 3V) khz External Clock f OSC khz duty % t R, t F 2 µs LCD Driving Voltage V LCD V DD -V5 (/5, /4 bias) 3 3 V NOTE: LCD Driving Voltage Power Duty /8, / Duty /6 Duty Bias /4 Bias /5 Bias V DD V DD V DD V V DD - V LCD /4 V DD - V LCD /5 V2 V DD - V LCD /2 V DD - 2V LCD /5 V3 V DD - V LCD /2 V DD - 3V LCD /5 32

33 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD V4 V DD - 3V LCD /4 V DD - 4V LCD /5 V5 V DD - V LCD V DD - V LCD AC Characteristics (V DD = 45 to 55V, T A = -3 to +85 C) Mode Characteristics Symbol Min Typ Max Unit Write Mode E Cycle Time tc 5 ns (refer to Figure-6) E Rise/Fall Time t R, t F 2 E Pulse Width (High, Low) tw 23 R/W and RS Setup Time tsu 4 R/W and RS Hold Time t H Data Setup Time tsu2 8 Data Hold Time t H2 Read Mode E Cycle Time tc 5 ns (refer to Figure-7) E Rise/Fall Time t R, t F 2 E Pulse Width (High, Low) tw 23 R/W and RS Setup Time tsu 4 R/W and RS Hold Time t H Data Output Delay Time td 2 Data Hold Time tdh 5 (V DD = 27 to 45V, T A = -3 to +85 C) Mode Characteristic Symbol Min Typ Max Unit Write Mode E Cycle Time tc ns (refer to Figure-6) E Rise/Fall Time t R, t F 25 E Pulse Width (High, Low) tw 45 R/W and RS Setup Time tsu 6 R/W and RS Hold Time t H 2 Data Setup Time tsu2 95 Data Hold Time t H2 Read Mode E Cycle Time tc ns (refer to Figure-7) E Rise/Fall Time t R, t F 25 E Pulse Width (High, Low) tw 45 R/W and RS Setup Time tsu 6 R/W and RS Hold Time t H 2 33

34 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD Data Output Delay Time t D - 36 Data Hold Time t DH 5 (V DD = 27 to 45V, T A = -3 to +85 C) Mode Characteristic Symbol Min Typ Max Unit Interface Mode with Clock Pulse Width (High, Low) tc 8 ns Extension Driver Clock Rise/Fall Time t R, t F 25 (refer to Figure-8) Clock Setup Time tsu 5 Data Setup Time tsu2 3 Data Hold Time t DH 3 M Delay Time t DM - RS VIH VIL tsu th R/W VIL VIL tw th E DB-DB7 tr VIH VIL VIH VIL tf tsu2 th2 Valid Data tc VIH VIL VIL Figure 8 Write Mode Timing Diagram 34

35 6COM/4SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD RS VIH VIL tsu th R/W VIH VIH tw th tf E tr VIH VIL td tdh VIL DB-DB7 VOH VOL Valid Data VOH VOL tc Figure 9 Read Mode Timing Diagram tf CLK VOH2 VOH2 tw VOL2 tr tw CLK2 VOL2 VOH2 VOH2 VOL2 tw tsu D VOH2 VOL2 tsu2 tdh M VOL2 tdm Figure 2 Interface Mode with Extension Driver Timing Diagram 35