GENERAL DESCRIPTION

The ML9042 used in combination with an 8-bit or 4-bit microcontroller controls the operation of a character type dot matrix LCD.

FEATURES

? Easy interfacing with an 8-bit or 4-bit microcontroller

? Switchable between serial and parallel interfaces

? Dot-matrix LCD controller driver for a 5 × 8 dot font

? Built-in circuit allowing automatic resetting at power-on

? Built-in 17 common signal drivers and 100 segment signal drivers

? Two built-in character generator ROMs each capable of generating 240 characters (5 × 8 dots)

The character generator ROM can be selected by bank switching (ROM1S) pin.

? Creation of character patterns by programming: up to 8 character patterns (5 × 8 dots)

? Built-in RC oscillation circuit using external or internal resistors

? Program-selectable duties

When ABE bit is “L”: 1/8 duty (1 line: 5 × 8 dots), or 1/16 duty (2 lines: 5 × 8 dots)

When ABE bit is “H”: 1/9 duty (1 line: 5 × 8 dots + arbitrator), or 1/17 duty (2 lines: 5 × 8 dots + arbitrator)

? Cursor display

? Built-in bias dividing resistors to drive the LCD

? Bi-directional transfer of segment outputs

? Bi-directional transfer of common outputs

? 100-dot arbitrator display

? Line display shifting

? Built-in voltage multiplier circuit

? Gold Bump Chip

ML9042-xx CVWA/DVWA