
86
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37272M6/M8–XXXSP/FP, M37272MA–XXXSP
M37272E8SP/FP, M37272EFSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.3
8.11.12 Window Function
This function sets the top and bottom boundary of display limit on a
screen. The window function is valid only in the CC mode. The top
boundary is set by the window registers 1 and bit 7 of block control
register 1. The bottom boundary is set by window registers 1 and bit
7 of block control register 2. This function is turned on and off by bit
2 of the OSD control register (refer to Figure 8.11.3).
The window registers 1 and 2 is shown in Figures 8.11.26 and 8.11.27.
Fig. 8.11.25 Example of Window Function
OSD mode
Window
FGHIJ
CC mode
KLMNO
CC mode
PQRST
CC mode
OSD mode
Bottom
boundary
of window
Top
boundary
of window
Screen
ABCDE
UVWXY
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