HD44780 LCD Controller

Description

Description The HD44780U dot-matrix liquid crystal display controller and driver LSI displays alphanumerics, Japanese kana characters, and symbols. It can be configured to drive a dot-matrix liquid crystal display under the control of a 4- or 8-bit microprocessor. Since all the functions such as display RAM, character generator, and liquid crystal driver, required for driving a dot-matrix liquid crystal display are internally provided on one chip, a minimal system can be interfaced with this controller/driver. A single HD44780U can display up to one 8-character line or two 8-character lines. The HD44780U has pin function compatibility with the HD44780S which allows the user to easily replace an LCD-II with an HD44780U. The HD44780U character generator ROM is extended to generate 208 5 × 8 dot character fonts and 32 5 × 10 dot character fonts for a total of 240 different character fonts. The low power supply (2.7V to 5.5V) of the HD44780U is suitable for any portable battery-driven product requiring low power dissipation. Features 5 × 8 and 5 × 10 dot matrix possible Low power operation support: — 2.7 to 5.5V Wide range of liquid crystal display driver power — 3.0 to 11V Liquid crystal drive waveform — A (One line frequency AC waveform) Correspond to high speed MPU bus interface — 2 MHz (when VCC = 5V) 4-bit or 8-bit MPU interface enabled 80 × 8-bit display RAM (80 characters max.) 9,920-bit character generator ROM for a total of 240 character fonts — 208 character fonts (5 × 8 dot) — 32 character fonts (5 × 10 dot) 64 × 8-bit character generator RAM — 8 character fonts (5 × 8 dot) — 4 character fonts (5 × 10 dot) 16-common × 40-segment liquid crystal display driver Programmable duty cycles — 1/8 for one line of 5 × 8 dots with cursor — 1/11 for one line of 5 × 10 dots with cursor — 1/16 for two lines of 5 × 8 dots with cursor Wide range of instruction functions: — Display clear, cursor home, display on/off, cursor on/off, display character blink, cursor shift, display shift Pin function compatibility with HD44780S Automatic reset circuit that initializes the controller/driver after power on Internal oscillator with external resistors Low power consumption HD44780U Pin Arrangement (FP-80B) HD44780 Datasheet

From the supplier's page.