• For Medium-Scale LCD
• Low Operating Voltage 2.7 to 5.0V
• On-Chip Character Generator ROM

■ DESCRIPTION
The SED1335 is a CMOS low-power dot matrix liquid crystal graphic display controller. The device stores in external RAM display data sent by an 8-bit microcomputer, and generates all the signals required by the LCD drivers. The LSI incorporates an internal character generator ROM which supports user-defined characters (also an external CGROM can be supported). The SED1335 can be interfaced to high-speed microprocessors such as the Intel family or Motorola family. The controller supports a set of rich commands that will allow the user to create a layered display of characters and graphics. Also, the controller functions as a pipeline buffer between the MPU and display memory so that low-cost, medium-speed SRAM can be used.

■ FEATURES
• CMOS low-power graphic and character display controller
• Selectable MPU interface is compatible with both the Intel family and the Motorola family
• Smooth scrolling support: Horizontal and vertical scroll Scrolling of selected areas of the display
• Multimode display:
2 layers of overlapping characters and graphics
3 layers of overlapping graphics
• Selectable display synthesis:
   Inverse video
  Flashing display, cursor on/off/blink
   Under and bar cursor, block cursor
  Simple animation
• Programmable cursor
• Internal character generator ROM
• Supports external character generator ROM:
  8 × 8 or 8 × 16 pixel characters
  Allowing mixing of ROM and RAM character sets
• Supports 64K bytes of memory:
  4K bytes of user-definable characters
  60K bytes of display memory
  in 2 of 32K × 8 100ns SRAM
  or in 8 of 8K × 8 100ns SRAM
• Display duty .................... 1/2 to 1/256
• Low power dissipation
   5mA (typical)
   0.05µA (typical), standby
• Logic power supply .......................... 2.7 to 5.5V
• Package: .................. Plastic QFP5-60 pin (F0A)
   Plastic QFP6-60 pin (F0B)