ST
Sitronix
ST7070
Dot Matrix LCD Controller/Driver
ꢀ Features
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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
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16-common x 80-segment liquid crystal
display driver
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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 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 (ST7070-XX-B)
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-- 2 MHz (when VCC = 5V)
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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)
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ꢀ 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.
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.
The ST7070 has function partial compatibility with the
HD44780, KS0066 and SED1278 that allows the user
Product Name
Support Character
ST7070-0B
Standard code
V1.4
1/51
2009/04/29
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
