M37280MF Datasheet, PDF (109/178 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

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MITSUBISHI MICROCOMPUTERS
M37280MF–XXXSP, M37280MK–XXXSP
M37280EKSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
12.11.15 Blank Function
The blank function can output blank (OUT1) area on all sides (verti-
cal and horizontal) of the screen.
The ON/OFF for vertical blank function is performed by bit 5 of the
OSD control register 1 and is used to select vertical window function
or vertical blank function by bit 6 of the OSD control register 2. Ac-
cordingly, the vertical blank function cannot be used simultaneously
with the vertical window function. The top border is set by the top
border control registers 1 and 2 (TB1, TB2), and the bottom border is
set by the bottom border control registers 1 and 2 (BB1, BB2), in 1H
units.
The ON/OFF for horizontal blank function is performed by bit 4 of the
OSD control register 2 and is used interchangeably for the horizontal
window function with bit 5 of the OSD control register 2 . Accordingly,
the horizontal blank function cannot be used simultaneously with the
horizontal window function. The left border is set by the left border
control registers 1 and 2 (LB1, LB2) and the right border is set by the
right border control registers 1 and 2 (RB1, RB2), in 1TOSC units.
The OSD output (except raster) in area with blank output is not de-
leted.
These blank signals are not output in the horizontal/vertical blanking
interval.
Notes 1: When using vertical blank, do not set “0016” and “0116” to TB1 at TB2
= “0016.”
2: When using horizontal blank, do not set LB1 = LB2 = “0016.”
3: Horizontal blank and horizontal window, as well as vertical blank
and vertical window can not be used simultaneously.
4: When using horizontal blank, set as follows:
(LB1 + LB2 ! 16²) < (RB1 + RB2 ! 16²).
5: When using vertical blank, set as follows:
(TB1 + TB2 ! 16²) < (BB1 + BB2 ! 16²).
6: When all-blocks display is OFF (bit 0 of OSD control register 1 = “0”),
do not use vertical blank.
A
4 ^A'
H
OUT1
L
H
B
L
Blank output
H
signal in
microcomputer
L
Output example of horizontal blank
A
4
Blank output
signal in
OUT1 B microcomputer
A'
LHL H LH
Output example of top and vertical blank
Fig. 12.11.47 Blank Output Example (When OSD Output is B + OUT1)
Rev. 1.0
109