GENERAL DESCRIPTION
The ST7533 is a single-chip dot matrix LCD drivers that can be connected directly to a microprocessor bus. 8-bit parallel or serial display data sent from the microprocessor is stored in the internal display data RAM and the chip generates a LCD drive signal independent of the microprocessor. Because the chips in the ST7533 contain 33x96 bits of display data RAM and there is a 1-to-1 correspondence between the LCD panel pixels and the internal RAM bits, these chips enable displays with a high degree of freedom.

FEATURES
• Direct display of RAM data through the display data RAM.
• RAM capacity : 33 x 96 = 3168 bits
• Display duty selectable by select pin
   1/33 duty : 33 common x 96 segment
   1/17 duty : 17 common x 96 segment
• High-speed 8-bit MPU interface (The chip can be connected directly to the both the 80x86 series MPUs and the 68000 series MPUs)/Serial interfaces are supported.
• Abundant command functions
   Display data Read/Write, display ON/OFF, Normal/
   Reverse display mode, page address set, display start
   line set, column address set, status read, display all
   points ON/OFF, LCD bias set, electronic volume,
   read/modify/write, segment driver direction select,
   power saver, static indicator, common output status
   select, V5 voltage regulation internal resistor ratio set.
• Static drive circuit equipped internally for indicators.
   (1 system, with variable flashing speed.)
• Low-power liquid crystal display power supply circuit equipped internally.
   Booster circuit (with Boost ratios of 2X/3X/4X, where the step-up voltage reference powersupply can be input externally).
   High-accuracy voltage adjustment circuit (Thermal
   gradient –0.15%/°C ) V5 voltage regulator resistors
   equipped internally, V1 to V4 voltage divider resistors
   equipped internally, electronic volume function
   equipped internally, voltage follower.
• CR oscillator circuit equipped internally (external clock can also be input)
• Extremely low power consumption Operating power
   when the built-in power supply is used (an example)
   70uA (VDD – VSS = VDD – VSS2 =3.0 V, Quad voltage,
   V5 – VDD = – 11.0 V).
   Conditions: When displays pattern OFF and the
   normal mode is selected.
• Power supply operate on the low 1.8 voltage
   Logic power supply
   VDD – VSS = 1.8V to 3.3V (+10% Range)
   Boost reference voltage: VDD – VSS2 = 1.8V to 3.3V
   Booster maximum voltage limited
   VOUT= -13V (+10% Range)
   Liquid crystal drive power supply: VDD – V5 = 4.0V to 13.0 V
• Wide range of operating temperatures: –40 to 85°C
• CMOS process
• These chips not designed for resistance to light or resistance to radiation.