HD66720 Datasheet | Hitachi Semiconductor

Description The HD66720 dot-matrix liquid crystal display controller (LCD) and driver LSI incorporates a key-scan function and an LED display function, and displays alphanumeric character and symbols. A single HD66720 is capable of displaying a single 10-character line or two 8-character lines. In addition, a single line of up to 40 characters can be displayed with extension drivers. Since the HD66720 incorporates a 5 × 6 matrix key scan circuit and two LED drive circuits, it can control front panels of telephone, car stereos, audio equipment, printers, or facsimiles with a single chip. A three-line clock synchronous serial transfer method is adopted for interfacing with a microputer, which greatly decreases the number of interface signals and makes it easy to miniaturize systems. This LSI is especially suitable for panels which can display five European languages (English, French, German, Italian, and Spanish), as used in new media products including car tuners for the radio data system (RDS), mini disc players (MD), and digital pact cassette players (DCC), personal handly phone, cellular phone. Features - Control and drive of a dot matrix LCD with built-in scanning - Wide field-of-division display with low duty cycle of 1/9 (1 line) and 1/17 (2 lines) - 10-character single line (5 × 8-dot font) and 50-segment display with a single chip (two 8-character line display by setting a register) - Maximum 40-character single line display with extension drivers (see list 1) - Built-in key scan matrix buffer circuit: 5 × 6 (30 keys) input (at strobe cycle: 5 ms to 40 ms, fosc = 160 k Hz) - Wake-up function with IRQ signal after key stroke - Two general purpose output ports (for LED displays, etc.) - Serial bus interface: Three-line clock synchronous serial transfer - Booster for liquid crystal drive voltage: Two/ three times power supply - Maximum 40-character display RAM - Character generator ROM: 240 5 × 8-dot char- acters - Character generator RAM: 8 user characters -...