Datasheet

• Set Offset Register
The offset register is used to determine the external character generator RAM area. The RA6963 has a 16-bit
address bus as follows:
RA6963 assign External character generator, when character code set 80h to FFh in using
Internal character generator. Character code 00h to 80h assign External character generator,
when External generator mode
The senior five bits define the start address in external memory of the CG RAM area. The next
eight bits represent the character code of the character. In internal CG ROM mode, character
Codes 00h to 7Fh represent the predefined “internal” CG ROM characters, and codes 80h to FFh
Represent the user’s own “external” characters. In external CG RAM mode, all 256 codes from
00h to FFh can be used to represent the user’s own characters. The three least significant bits
indicate one of the eight rows of eight dots that define the character’s shape.
The Relationship between Display RAM Address and Offset Register