HD66724/HD66725
(Graphics LCD Controller/Driver with Key Scan Function)
ADE-207-309(Z) Rev 1.2 '99.8 Description
The HD66724/HD66725, dot-matrix graphics LCD controller and driver LSI incorporating a key scan function up to a 4-by-8 key matrix, display characters such as alphanumerics, katakana, hiragana and symbols as well as graphics such as kanji and pictograms. They can be configured to drive a dot-matrix liquid crystal display and control key scan functions under the control of the microprocessor connected via the clock-synchronized serial or 4/8-bit bus. The HD66724 is capable of displaying up to three 12character lines, 72-by-24 dot graphics and 144 segments. The HD66725 is capable of displaying up to three 16-character lines, 96-by-24 dot graphics and 192 segments. Of the 144 (192) segments displayed, 48 (64) segments can be grayscaled. The HD66724/HD66725 have a smooth horizontal/vertical scroll display and double-height display so that the user can easily see a variety of information within a small LCM. The HD66724/HD66725 have various functions to reduce the power consumption of an LCD system such as low-voltage operation of 1.8 V or less, a booster to generate maximum triple LCD drive voltage from the supplied voltage, and voltage-followers to decrease the direct current flow in the LCD drive bleederresistors. Combining these hardware functions with software functions such as standby and sleep modes allows fine power control. The HD66724/HD66725 are suitable for any portable battery-driven product requiring long-term driving capabilities and small physical dimensions such as cellular phones, pagers, portable audio devices, or electronic wallets.
Features
• • • • • • Control and drive of a character and graphics LCD with built-in key scan functions Three 12- (16-) character lines, 72 (96) -by-24 dot graphics, and 144 (192) segments 48 (64) grayscale segments Control up to a 4 × 8 (32 key) matrix key scan. 3 general ports built-in Low-power operation support:
1
HD66724/HD66725
Vcc = 1.8 to 5.5 V (low voltage) VLCD = 3.0 to 6.5 V (liquid crystal drive voltage) Single, double or triple booster for liquid crystal drive voltage Contrast adjuster and voltage followers to decrease direct current flow in the LCD drive bleederresistors Wake-up feature using key scan interrupt Programmable drive duty ratios and bias values displayed on LCD Clock-synchronized serial interface 4-/8-bit bus interface capability (except when key scan circuit is used) 80 × 8-bit display data RAM (80 characters max) 20,736-bit (6 × 8 dots : 432 characters) character generator ROM 384 × 8-bit (64 characters) character generator RAM 96 × 2-bit (192 segment-icons and marks max) segment RAM 72- (96-) segment × 26-common-signal liquid crystal display driver Programmable display sizes and duty ratios Vertical and horizontal smooth scrolls Vertical double-height display Selectable CGROM memory bank (max. 432 fonts) Wide range of instruction functions: Clear display, display on/off control, icon and mark control, character blink, black-white reversed blinking cursor, return home, cursor on/off, black-white reversed raster-row No wait time for instruction execution and RAM access (zero instruction) Internal oscillation (with external or built-in resistor) hardware reset Shift change of segment and common driver Slim chip with bumps for chip-on-glass (COG) mounting, and tape carrier package (TCP) Progammable Display Sizes and Duty Ratios
Character Display Duty Optimum Ratio Drive Bias 1/2 1/10 1/18 1/26 1/2 1/4 1/5 1/6 HD66724 Unavailable 1 line x 12 characters 2 lines x 12 characters 3 lines x 12 characters HD66725 Unavailable 1 line x 16 characters 2 lines x 16 characters 3 lines x 16 characters Graphics Display HD66724 Unavailable 72 x 8 dots HD66725 Unavailable 96 x 8 dots HD66724: 144 Segment Display Scanned General Keys Ports 32 (4 x 8) 3
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Table 1
72 x 16 dots 96 x 16 dots HD66725: 192 72 x 24 dots 96 x 24 dots
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HD66724/HD66725
Total Current Consumption Characteristics (Vcc = 3 V, fosc = 32 kHz, TYP Conditions, LCD Drive Power Current Included)
Total Power Consumption Normal Display Operation Character Display Size Duty Ratio Optimum Frame Drive Bias Frequency 1/2 1/4 1/5 1/6 80 Hz 80 Hz 74 Hz 77 Hz Internal Logic (14 µA) (20 µA) (20 µA) (20 µA) LCD Power (12 µA) (17 µA) (17 µA) (17 µA) Total* (26 µA) (54 µA) (54 µA) (54 µA) Sleep Mode (11 µA) (11 µA) (11 µA) Standby Mode
Segment only 1/2 1-line display 2-line display 3-line display 1/10 1/18 1/26
(11 µA) 0.1 µA
Note : When duty ratio = 1/2 and a double booster is not used: the total power consumption = Internal logic current + LCD power current When duty ratio = 1/10 and a double booster is used: the total power consumption = Internal logic current + LCD power current x 2
Type Name
Types HD66724RA03TA0L HCD66724RA03BP HD66725A03TA0L HCD66725A03BP External Dimensions TCP Au-bumped chip TCP Au-bumped chip Operation Voltages 1.8 V to 5.5 V Internal Fonts Katakana, alphanumerics, symbols and European fonts
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HD66724/HD66725
LCD-II Family Comparison
Items Character display sizes Graphic display sizes Multiplexing icons Annunciator Key scan control LED control ports General output port Operating power voltages Liquid crystal drive voltages Serial bus Parallel bus Expansion driver control Liquid crystal drive duty ratios Liquid crystal drive biases Liquid crystal drive waveforms Liquid crystal voltage booster Bleeder-resistor for liquid crystal drive Liquid crystal drive operational amplifier Liquid crystal contrast adjuster Horizontal smooth scroll Vertical smooth scroll Double-height display DDRAM CGROM CGRAM SEGRAM No. of CGROM fonts No. of CGRAM fonts Font sizes Bit map area R-C oscillation resistor/oscillation frequency Reset function Low power control HD66712U 12 characters x 4 lines — 60 — — — — 2.7 V to 5.5 V 3 V to 13 V Clock-synchronized serial 4 bits, 8 bits Possible 1/17, 33 1/4 to 1/6, 7 B Double or triple External — — Dot unit — — 80 x 8 9,600 64 x 8 16 x 8 240 8 5x8 — External resistor (270 kHz) Incorporated, external LP display mode HD66720 8 characters x 2 lines — 42 — 5x6 2 — 2.7 V to 5.5 V 3 V to 11 V Clock-synchronized serial — Possible 1/9, 17 1/4 to 1/5 B Double or triple External — — Dot unit — — 40 x 8 9,600 64 x 8 16 x 8 240 8 5x8 — External resistor (150 kHz) Incorporated, external LP display mode Simple standby HD66705U 12 characters x 2 lines — 40 Static: 10 — — — 2.4 V to 5.5 V 3 V to 9 V Clock-synchronized serial 4 bits, 8 bits Impossible 1/10, 18 1/4 B Double or triple Incorporated (external) Incorporated Incorporated — Line unit Yes 60 x 8 9,600 32 x 5 8x5 240 4 5x8 — External resistor (40, 80 kHz) External Partial display off Display off Oscillation off Liquid crystal power off SEG only — — TCP-153 Yes Yes 153 9.69 x 2.73 120 µm
SEG/COM direction switching QFP package TQFP package TCP package Bare chip Bumped chip No. of pins Chip sizes Pad intervals
— (S mask) — TCP-128 Yes Yes 128 4.95 x 5.27 128 µm
— QFP-1420 TQFP-1414 — Yes — 100 5.60 x 6.00 160 µm
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HD66724/HD66725
LCD-II Family Comparison (cont)
Items Character display sizes Graphic display sizes Multiplexing icons Annunciator Key scan control LED control ports General output ports Operating power voltages Liquid crystal drive voltages Serial bus Parallel bus Expansion driver control Liquid crystal drive duty ratios Liquid crystal drive biases Liquid crystal drive waveforms Liquid crystal voltage booster Bleeder-resistor for liquid crystal drive Liquid crystal drive operational amplifier Liquid crystal contrast adjuster Horizontal smooth scroll Vertical smooth scroll Double-height display DDRAM CGROM CGRAM SEGRAM No. of CGROM fonts No. of CGRAM fonts Font sizes Bit map area R-C oscillation resistor/ oscillation frequency Reset function Low power control HD66717 12 characters x 4 lines — 40 Static: 10 — — — 2.4 V to 5.5 V 3 V to 13 V I2C, Clock-synchronized serial 4 bits, 8 bits Impossible 1/10, 18, 26, 34 1/4, 1/6 B Double or triple Incorporated (external) Incorporated Incorporated — Line unit Yes 60 x 8 9,600 32 x 5 8x5 240 4 5x8 — External resistor (40-160 kHz) External Partial display off Display off Oscillation off Liquid crystal power off SEG only — — TCP-153 Yes Yes 153 10.88 x 2.89 120 µm HD66727 12 characters x 4 lines — 40 Static: 12 4x8 3 3 2.4 V to 5.5 V 3 V to 13 V I2C, Clock-synchronized serial — Impossible 1/10, 18, 26, 34 1/4, 1/6 B Double or triple Incorporated (external) Incorporated Incorporated — Line unit Yes 60 x 8 11,520 32 x 6 8x6 240 4 5 x 8, 6 x 8 — External resistor (40-160 kHz) External Partial display off Display off Oscillation off Liquid crystal power off Key wake-up interrupt SEG, COM — — TCP-158 Yes Yes 158 11.39 x 2.89 120 µm HD66724 12 characters x 3 lines 72 x 26 dots 144 1/2 duty: 144 8x4 — 3 1.8 V to 5.5 V 3 V to 6 V Clock-synchronized serial 4 bits, 8 bits Impossible 1/2, 10, 18, 26 1/4 to 1/6.5 B Single, double or triple Incorporated (external) Incorporated Incorporated 3-dot unit Line unit Yes 80 x 8 20,736 384 x 8 72 x 8 240 + 192 64 6x8 72 x 26 External resistor, incorporated (32 kHz) External Partial display off Display off Oscillation off Liquid crystal power off Key wake-up interrupt SEG, COM — — TCP-146 — Yes 146 10.34 x 2.51 80 µm
SEG/COM direction switching QFP package TQFP package TCP package Bare chip Bumped chip No. of pins Chip sizes Pad intervals
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HD66724/HD66725
LCD-II Family Comparison (cont)
Items Character display sizes Graphic display sizes Multiplexing icons Annunciator Key scan control LED control ports General output ports Operating power voltages Liquid crystal drive voltages Serial bus Parallel bus Expansion driver control Liquid crystal drive duty ratios Liquid crystal drive biases Liqu
