HD66730 Datasheet, PDF (20/131 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display

HD66730/HD66731
Character Generator ROM for a Full-Size Font (FCGROM)
The character generator ROM for a full-size font (FCGROM) generates 3,840 11 × 12 dot full-size
character patterns from a 12-bit character code. This includes 2,965 kanji according to the JIS Level-1
Kanji Set and 524 JIS non-kanji. Table 4 shows the relationship between character codes set in DDRAM
and full-size font patterns. Refer to Combined Display of Full-Size and Half-Size Characters for the
relationship between JIS codes and the character codes to be set in the DDRAM.
Character Generator ROM for a Half-Size Font (HCGROM)
The character generator ROM for a half-size font (HCGROM) generates 128 6 × 12 dot character patterns
from 7-bit character codes. A half-size font (alphanumeric characters and symbols) can be displayed
together with a full-size font. Refer to Combined Display of Full-Size and Half-Size Characters for details.
Character Generator RAM (CGRAM)
The character generator RAM (CGRAM) allows the user to display arbitrary full-size font patterns. It can
display 8 12 × 13 dot fonts.
This RAM can also display double-size characters and figures by combining multiple CGRAM fonts.
Specify character codes from H'000 to H'007 in a full size of character code when displaying font patterns
stored in the CGRAM.
Segment RAM (SEGRAM)
The segment RAM (SEGRAM) is used to control icons and marks in segment units by the user program.
Bits in SEGRAM corresponding to segments to be displayed are directly set by the MPU, regardless of the
contents of DDRAM and CGRAM. The SEGRAM is read and displayed when the COMS output pin is
selected.
Up to 71 icons can be displayed using a single HD66730. Up to 96 icons can be displayed by expanding the
drivers on the segment side. SEGRAM data is stored in eight bits. The lower six bits control the display of
each segment, and the upper two bits control segment blinking.
HD66731 can display 96 icons without the expanding driver.
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