HD66724 Datasheet, PDF(2/117 Page) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

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HD66724 Datasheet, PDF (2/117 Pages) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

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HD66724/HD66725

ï£§ Vcc = 1.8 to 5.5 V (low voltage)

ï£§ VLCD = 3.0 to 6.5 V (liquid crystal drive voltage)

ï£§ Single, double or triple booster for liquid crystal drive voltage

ï£§ Contrast adjuster and voltage followers to decrease direct current flow in the LCD drive bleeder-

resistors

ï£§ Wake-up feature using key scan interrupt

ï£§ Programmable drive duty ratios and bias values displayed on LCD

â¢ Clock-synchronized serial interface

â¢ 4-/8-bit bus interface capability (except when key scan circuit is used)

â¢ 80 Ã 8-bit display data RAM (80 characters max)

â¢ 20,736-bit (6 Ã 8 dots : 432 characters) character generator ROM

â¢ 384 Ã 8-bit (64 characters) character generator RAM

â¢ 96 Ã 2-bit (192 segment-icons and marks max) segment RAM

â¢ 72- (96-) segment Ã 26-common-signal liquid crystal display driver

â¢ Programmable display sizes and duty ratios

â¢ Vertical and horizontal smooth scrolls

â¢ Vertical double-height display

â¢ Selectable CGROM memory bank (max. 432 fonts)

â¢ Wide range of instruction functions:

ï£§ 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

â¢ No wait time for instruction execution and RAM access (zero instruction)

â¢ Internal oscillation (with external or built-in resistor) hardware reset

â¢ Shift change of segment and common driver

â¢ Slim chip with bumps for chip-on-glass (COG) mounting, and tape carrier package (TCP)

Table 1 Progammable Display Sizes and Duty Ratios

Character Display

Duty Optimum

Ratio Drive Bias HD66724

HD66725

1/2 1/2

Unavailable Unavailable

1/10 1/4

1 line x 12 1 line x 16

characters characters

1/18 1/5

2 lines x 12 2 lines x 16

characters characters

1/26 1/6

3 lines x 12 3 lines x 16

characters characters

Graphics Display

HD66724

HD66725

Segment Scanned General

Display Keys Ports

Unavailable Unavailable

32 (4 x 8) 3

72 x 8 dots 96 x 8 dots HD66724:

144

72 x 16 dots 96 x 16 dots HD66725:

192

72 x 24 dots 96 x 24 dots

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