SED1330F Datasheet, PDF (128/148 Pages) List of Unclassifed Manufacturers – LCD Controller ICs

9.0 Application Notes
9.1.3
9.1.3 Display Mode Setting Example 1: Combining Text and Graphics
• Conditions
• 320 × 200 pixels, single-panel drive (1/
200 duty cycle)
• First layer: text display
• Second layer: graphics display
• 8 × 8-pixel character font
• CG RAM not required
• Display memory allocation
• First layer (text): 320/8 = 40 characters
per line, 200/8 = 25 lines. Required
memory size = 40 × 25 = 1000 bytes.
• Second layer (graphics): 320/8 = 40 char-
acters per line, 200/1 = 200 lines. Re-
quired memory size = 40 × 200 = 8000
bytes.
03E8H
2nd graphics layer
(8000 bytes)
0000H
1st character layer
(1000 bytes)
2327H
03E7H
Figure 81. Character over graphics layers
• Register setup procedure
SYSTEM SET
TC/R calculation
SCROLL
C=
40H
C=
44H
P1 =
30H
P2 =
87H
P3 =
07H
f_OSC = 6 MHz
f_FR = 70 Hz
P1 =
P2 =
P3 =
00H
00H
C8H
P4 =
27H
P5 =
2FH
(1/6) × 9 × [TC/R] × 200 = 1/70
[TC/R] = 48, so TC/R = 2FH
P4 =
E8H
P5 =
03H
P6 =
P7 =
C7H
28H
P6 =
P7 =
C8H
XH
P8 =
00H
P8 =
XH
P9 =
XH
P10 = XH
128 _{S-MOS Systems, Inc. • 2460 North First Street • San Jose, CA 95131 • Tel: [phone] • Fax: [phone]}