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ML9042

DOT MATRIX LCD CONTROLLER DRIVER

LAPIS Semiconductor Co., Ltd. 

LAPIS Semiconductor

ML9042-xx

DOT MATRIX LCD CONTROLLER DRIVER

FEDL9042-01

Issue Date: Nov. 19, 2003

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

*xx indicates a character generator ROM code number.

*01, 11 and 21 indicate general character generator ROM code numbers.

CVWA indicates a bump chip with high hardness, and DVWA indicates a bump chip with low

hardness.

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