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S1D13706F00A Datasheet(PDF) 60 Page - Epson Company |
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S1D13706F00A Datasheet(HTML) 60 Page - Epson Company |
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60 / 94 page  54 EPSON S1D13305 Series Technical Manual 10. CHARACTER GENERATOR 10.1. CG Characteristics 10.1.1. Internal character generator The internal character generator is recommended for minimum system configurations containing a S1D13305 series, display RAM, LCD panel, single-chip micropro- cessor and power supply. Since the internal character generator uses a CMOS mask ROM, it is also recom- mended for low-power applications. •5 × 7-pixel font (See Section 17.) • 160 JIS standard characters • Can be mixed with character generator RAM (maxi- mum of 64 CG RAM characters) • Can be automatically spaced out up to 8 × 16 pixels 10.1.2. 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 10.3.) • 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) • 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; however, excess bits must be set to zero. 10.1.3. Character generator RAM The user can freely use the character generator RAM for storing graphics characters. The character generator RAM can be mapped by the microprocessor anywhere in dis- play 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 generator ROM • Mapped into the display memory address space at F000H to F7FFH if not used with the character gen- erator ROM (more than 64 characters are in the CG RAM). Set SAG0 to F000H and M1 to zero when defining characters number 193 upwards. CHARACTER GENERATOR |
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