ST7070
16Cx80S Dot Matrix LCD Controller/Driver
Product Description
The ST7070 dot-matrix liquid crystal display controller and driver LSI displays alphanumeric, 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. With high speed serial interface(3-line SPI , 4-line SPI), the external MCU can control ST7070 directly. 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.
The ST7070 has function partial compatibility with the HD44780, KS0066 and SED1278 that allows the user to easily replace it with an ST7070. The ST7070 character generator ROM is extended to generate 496 5x8 dot character fonts for a total of 496 different character fonts. The low power supply (2.7V to 5.5V) of the ST7070 is suitable for any portable battery-driven product requiring low power dissipation.
The ST7070 LCD driver consists of 16 common signal drivers and 80 segment signal drivers which can extend display size by cascading segment driver ST7921. The maximum display size can be either 80 characters in 1-line display or 40 characters in 2-line display. A single ST7070 can display up to one 16-character line or two 16-character lines.
Features - 5 x 8 dot matrix possible
- Low power operation support:
- 2.7 to 5.5V
- Wide range of LCD driver power
- 3.0 to 7.0V
- Support high speed serial interface
- Correspond to high speed MPU bus interface
- 2 MHz (when VCC = 5V)
- 80 x 9-bit display RAM (80 characters max.)
- 19840-bit character generator ROM for a total of 496 character fonts(5 x 8 dot)
- 64 x 8-bit character generator RAM
- 8 character fonts (5 x 8 dot)
- 16-common x 80-segment liquid crystal display driver
- Programmable duty cycles
- 1/8 for one line of 5 x 8 dots with cursor
- 1/16 for two lines of 5 x 8 dots & cursor
- Wide range of instruction functions:
Display clear, cursor home, display on/off, cursor on/off, cursor blink, cursor shift, display shift
- Automatic reset circuit that initializes the controller/driver after power on
- Internal oscillator with external resistors
- Low power consumption
Bare chip available
Downloads
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