SED1330F Datasheet, PDF (97/148 Pages) List of Unclassifed Manufacturers – LCD Controller ICs

6.0 – 6.1.3
6.0 Character Generator
6.1 CG Characteristics
6.1.1 Internal Character Generator
The internal character generator is recommended for
minimum system configurations containing a
SEDSED1330F/1335F/1336F, display RAM, LCD
panel, single-chip microprocessor and power supply.
Since the internal character generator uses a CMOS
mask ROM, it is also recommended for low-power
applications.
• 5 × 7-pixel font (See Section 10)
• 160 JIS standard characters
• Can be mixed with character generator RAM
(maximum of 64 CG RAM characters)
• Can be automatically spaced out up to 8 × 16
pixels
6.1.2 External Character Generator ROM
The external CG ROM can be used when fonts other
than those in the internal ROM are needed. Data is
stored in the external ROM in the same format used
in the internal ROM. (See Section 6.3.)
• Up to 8 × 8-pixel characters (M2 = 0) or 8 × 16-
pixel characters (M2 = 1)
• Up to 256 characters (192 if used together with
the internal ROM)
6.0 Character Generator
• Mapped into the display memory address space
at F000H to F7FFH (M2 = 0) or F000H to
FFFFH (M2 = 1)
• Characters can be up to 8 × 16-pixels; how-
ever, excess bits must be set to zero.
6.1.3 Character Generator RAM
The user can freely use the character generator RAM
for storing graphics characters. The character gen-
erator RAM can be mapped by the microprocessor
anywhere in display memory, allowing effective use of
unused address space.
• Up to 8 × 8-pixel characters (M2 = 0) or 8 × 16
characters (M2 = 1)
• Up to 256 characters if mapped at F000H to
FFFFH (64 if used together with character
generator ROM)
• Can be mapped anywhere in display memory
address space if used with the character gen-
erator ROM
• Mapped into the display memory address space
at F000H to F7FFH if not used with the charac-
ter generator ROM (more than 64 characters
are in the CG RAM). Set SAG0 to F000H and
M1 to zero when defining characters number
193 upwards.
268-0.4 _{S-MOS Systems, Inc. • 2460 North First Street • San Jose, CA 95131 • Tel: [phone] • Fax: [phone]}