OVERVIEW
The ST7522 family of dot matrix LCD drivers are designed for the display of characters and graphics. The drivers generate LCD drive signals derived from bit mapped data stored in an internal RAM. The drivers are available in two configurations The ST7522 family drivers incorporate innovative circuit design strategies to achieve very low power dissipation at a wide range of operating voltages. These features give the designer a flexible means of implementing small to medium size LCD displays for compact, low power systems. The ST7522 which is able to drive 1 line of 6 Chinese characters or 2 lines of 12 Chinese characters each line with two ST7522.

FEATURES
● Fast 8-bit MPU interface compatible with 80- and 68- family microcomputers and serial interface
● Clock synchronous serial interface
● Many command set
   Display data Read/Write, display ON/OFF,
   Normal/Reverse display mode, page address 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, adjustable OSC
   frequency, booster input voltage select, follower
   input voltage and amplified ratio selectable
● 4 static indicator and 96 icon available
● Total 118 (segment + common + static) drive sets
● Wide range of supply voltages
   VDD – VSS： 2.7 to 5.5 V
   VDD – V5： 3.5 to 7.0 V
   VDD – VCAP3 ： 3.5 to 7.0 V
● Low-power CMOS
● 64 level digital contrast control