HD44780U

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


Pinout

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.