Block Diagram

Display Control Commands

Display control commands have an 8-bit format and are transferred using the serial input function. Commands consist of

a command identification code in the first byte and command data in the following bytes. The following commands are

supported.

1 COMMAND 0: Display memory (VRAM) write address setup command

2 COMMAND 1: Display character data write command

3 COMMAND 2: Vertical display start position and vertical character size setup command

4 COMMAND 3: Horizontal display start position and horizontal character size setup command

5 COMMAND 4: Display control setup command

6 COMMAND 5: System 2 (BLK2 and CHA2) output control (lines 1 to 6) and line size setting command

7 COMMAND 6: System 2 (BLK2 and CHA2) output control (lines 7 to 12) and general-purpose port setting command

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LC74770M