m37280eksp Mitsumi Electronics, Corp., m37280eksp Datasheet - Page 104

• Manufacturer Part Number: m37280eksp
• Description: Single-chip 8-bit Cmos Microcomputer With Closed Caption Decoder And On-screen Display Controller
• Manufacturer: Mitsumi Electronics, Corp.

12.11.14 Window Function
The window function can be set windows on-screen, and output OSD
within only the area where the window is set.
The ON/OFF for vertical window function is performed by bit 5 of
OSD control register 1 and is used to select vertical window function
or vertical blank function by bit 6 of OSD control register 2. Accord-
ingly, the vertical window function cannot be used simultaneously
with the vertical blank function. The display mode to validate the win-
dow function is selected by bits 5 to 7 of OSD control register 3. The
top boundary is set by top border control registers 1 and 2 (TB1,
TB2) and the bottom boundary is set by bottom border control regis-
ters 1 and 2 (BB1, BB2).
The ON/OFF for horizontal window function is performed by bit 4 of
OSD control register 2 and is used interchangeably for the horizontal
blank function with bit 5 of OSD control register 2. Accordingly, the
horizontal blank function cannot be used simultaneously with the
horizontal window function. The display mode to validate the window
function is selected by bits 5 to 7 of OSD control register 3. The left
boundary is set by left border control registers 1 and 2 (LB1 and
LB2), and the right boundary is set by right border control registers 1
and 2 (RB1 and RB2).
Fig. 12.11.38 Example of window function (When CC Mode Is Valid)
104
Left boundary
of window
A B C D E
F
K L M N O
P Q R S T
U V W X Y
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
G H
Window
I
Screen
M37280MF–XXXSP, M37280MK–XXXSP
J
Right boundary
of window
CDOSD mode
CC mode
OSD mode
Notes 1: When using vertical window, do not set “00
2: When using horizontal window, do not set LB1 = LB2 = “00
3: Horizontal blank and horizontal window, as well as vertical blank and
4: When using horizontal window, set as follows:
5: When using vertical window, set as follows:
6: When the window function is ON by OSD control registers 1 and 2,
= “00
vertical window can not be used simultaneously.
(LB1 + LB2
(TB1 + TB2
the window function of OUT2 is valid in all display mode regardless
of setting value of OSD control register 3 (bits 5 to 7). For example,
even when make the window function valid in only CC mode, the
function of OUT2 is valid in OSD and CDOSD modes.
16
.”
and ON-SCREEN DISPLAY CONTROLLER
16
16
MITSUBISHI MICROCOMPUTERS
2
2
) < (RB1 + RB2
) < (BB1 + BB2
Top boundary
of window
Window
Bottom boundary
of window
M37280EKSP
16
16
2
2
).
).
16
” or “01
16
” to TB1 at TB2
Rev. 1.0
16
.”