PROGRAMMABLE LCD CONTROLLER/DRIVER

The µPD7225 is a software-programmable LCD (Liquid Crystal Display) controller/driver. The µPD7225 can be serially interfaced with the CPU in a microcomputer and can directly drive 2, 3, or 4-time division LCD. The µPD7225 contains a segment decoder which can generate specific segment patterns. In addition, the µPD7225 can be used to control on/off (blinking) operation of a display.

FEATURES
• Can directly drive LCD
• Programmable time-division multiplexing
   • Static drive
   • Divide-by-2, 3, or -4 time division multiplexing
• Number of digits displayed
   • 7-segment
      Divide-by-4 time division ............... 16 digits
      Divide-by-3 time division ............... 10 2/3 digits
      Divide-by-2 time division ............... 8 digits
      Static................................................. 4 digits
   • 14-segment
      Divide-by-4 time division ............... 8 digits
• Bias method
   Static, 1/2, 1/3
• Segment decoder output
   • 7-segment : Numeric characters 0 to 9, six symbols
   • 14-segment: 36 alphanumeric characters, 13 symbols
• Blinking operation
• Multi-chip configuration possible
• 8-bit serials interface
   75X series and 78K series compatible
• CMOS
• Single power supply