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The Hitachi HD44780 LCD controller is an alphanumeric dot matrix liquid crystal display (LCD) controller developed by Hitachi in the 1980s. The character set of the controller includes ASCII characters, Japanese Kana characters, and some symbols in two 40 character lines.
LCD Smartie is open-source software for Microsoft Windows which allows a character LCD to be used as an auxiliary display device for a PC. Supported devices include displays based on the Hitachi HD44780 LCD controller, the Matrix Orbital Serial/USB LCD, and Palm OS devices (when used in conjunction with PalmOrb).
Hitachi also improved the viewing angle dependence further by optimizing the shape of the electrodes (Super IPS). NEC and Hitachi became early manufacturers of active-matrix addressed LCDs based on the IPS technology. This is a milestone for implementing large-screen LCDs having acceptable visual performance for flat-panel computer monitors and ...
The documentation for the notable example of a display driver IC given in this article, the Hitachi HD44780 LCD controller, calls it a "dot-matrix liquid crystal display controller and driver LSI". I assume that LSI means large scale integration, i.e., a type of integrated circuit.
After searching for it in the data sheet, I discovered that the HD44780 has Pull-Up MOSFETs at DB0–DB7, RS, and R/ W: see pp. 48 and 51 (where the pull-up current is specified) as well as page 54 which shows the internal structure behind the pins. So DB0–DB3 should, if in 4-bit mode, left unconnected and will be read as 1s.
The following is a list of CMOS 4000-series digital logic integrated circuits.In 1968, the original 4000-series was introduced by RCA.Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (3V to 18V recommended range for "B" series) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue ...
DataSheets.com is a searchable database of electronic component data sheets and purchasing information. [1] The website is intended for Design engineers and Electronics purchasing agents. [ 2 ] DataSheets.com was developed by UBM in conjunction with SiliconExpert Technologies .
The Hitachi H8 is a large family of 8-bit, 16-bit and 32-bit microcontrollers made by Renesas Technology, originating in the early 1990s within Hitachi Semiconductor. The original design, the H8/300 , was an 8-bit processor that had a 16-bit registers and ALU that allowed some 16-bit operations.