
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
FG H
I
J
CC mode
KL
M NO
CC mode
PQ R
ST
CC mode
OSD mode
Bottom
boundary
of window
Top
boundary
of window
Screen
A BCD E
UV
W X
Y