FD2000

Rev1.0

11/37

6.4. CGROM (CHARACTER GENERATOR ROM)

CGROM is ROM used to generate the 240 kinds of 5 x 7, 5 x 8, or 5 x 9 dot matrix character patterns from the 8-

bit character codes. CGROM has a capacity of 240 x 45 bits. When a character code is written to DCRAM, the

character pattern stored in CGROM corresponding to the character code is displayed at the position on the LCD

corresponding to the DCRAM address loaded into AC.

6.5. CGRAM (CHARACTER GENERATOR RAM)

CGRAM is RAM to which user programs can freely write arbitrary character patterns. Up to 16 kinds of 5 x 7, 5 x 8,

or 5 x 9 dot matrix character patterns can be stored. CGRAM has a capacity of 16 x 45 bits.