7220 Datasheet, PDF (175/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
5.1 Example of multi-line display
5.1 Example of multi-line display
The M37221Mx-XXXSP/FP is used as a general example in describing this application for the 7220 group.
The M377221Mx-XXXSP/FP ordinarily displays 2 lines on a CRT screen by displaying 2 blocks at different
vertical positions. In addition to this, it can display 3 lines or more (multi-line display) by rewriting both
character data and display positions during interrupt processing, using CRT interrupts. An example of the
software processing for implemention this multi-line display is described below. This example is 12-line
multi-line display using blocks 1 and 2.
For CRT display details, refer to “2.11 CRT display function.”
5.1.1 Specifications
qPins required: R, G, B, OUT1, HSYNC, and VSYNC
qH /V SYNC SYNC input polarity: positive polarity input
qR/G/B/OUT1 output polarity: positive polarity output
qCharacter colors: red, blue, white, and cyan
qNo character background color
qBordering (OUT) is available
qCharacter size: minimum size
q12-line display
5.1.2 Connection example
P52/R
P53/G
P54/B
P55/OUT1
HSYNC
VSYNC
M37221Mx-XXXSP/FP
Color TV signal processor
Fig. 5.1.1 Connection example
Blue (B)
Monitor
Cyan
(R+G)
CALENDAR
JAN
Sun. Mon. Tues. Wed. Thur.
3
10
Red (R) _{1 7}
24
31
4
5
6
7
11 12 13 14
18 19 20 21
25 26 27 28
Fri. Sat.
1
2
8
9
15 16
22 23
29 30
←The 1st line
← The 2nd line
← The 3rd line
← The 4th line
Block 1
Block 2
Block 1
Block 2
← The 5th line
← The 6th line
← The 7th line
← The 8th line
← The 9th line
← The 10th line
← The 11th line
← The 12th line
Block 1
Block 2
Block 1
Block 2
Block 1
Block 2
Block 1
Block 2
White (R+G+B)
Fig. 5.1.2 Display example
5-2
7220 Group User’s Manual