GENERAL DESCRIPTION

ST7038 dot-matrix liquid crystal display controller can display alphanumeric, Japanese kana characters and symbols. It can be configured to drive a dot-matrix liquid crystal display under the control of a microprocessor with 4/8-bit 6800-series or 8080-series, 3/4-line serial or fast I2C interface. Since all the functions (such as display RAM, character generator ROM/RAM and liquid crystal driver) required for driving a dot-matrix liquid crystal display are internally embedded in this chip, a minimal system can be used with this controller/driver.

FEATURES

• 5 x 8 dot matrix possible

• Support low voltage single power operation:

  - VDD, VDD2: 1.8 to 3.3V

• LCD Voltage Operation Range (V0/Vout)

  - Programmable V0: 3 to 7V(V0)

  - External power applied: Max. 12V(Vout)

• Interface

  - 6800-4bit / 8bit interface

  - 8080-4bit / 8bit interface

  - 3-line serial interface

  - 4-line serial interface

  - I2C interface

• Support display mode:

  - 8-COM x 100-SEG and 80 ICON

  - 16-COM x 100-SEG and 80 ICON

  - 24-COM x 80-SEG and 80 ICON

• 10,240-bit Character Generator ROM (CGROM) stores 256 character fonts

• 64 x 8-bit Character Generator RAM (CGRAM)

• 80 x 8-bit Display RAM (80 characters max.)

• 16 x 5 bit ICON RAM

• Variable instruction functions:

  clear display, return home, display ON/OFF,

  cursor ON/OFF, character blink, cursor shift,

  display shift, double height font, ICON control and character generation RAM

• Reset circuit through an external reset pin

• Internal oscillator or external clock

• Built-in low power consumption voltage booster, regulator and follower circuit

• Built-in high-accuracy voltage regulator:

  - Programmable output range: 3~7V

• COM/SEG direction selectable by instruction

• Selectable CGRAM/CGROM size

• Package Type: COG