M3727GM6 Datasheet, PDF (64/129 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

M3727GM6/M8–XXXSP/FP M37272E8SP/FP
8.11.1 Display Position
The display positions of characters are specified in units called a
“block.” There are 2 blocks, blocks 1 and 2. Up to 32 characters can
be displayed in each block (refer to “8.11.5 Memory for OSD”).
The display position of each block can be set in both horizontal and
vertical directions by software.
The display start position in the horizontal direction can be selected
for all blocks in common from 128-step display positions in units of
4TOSC (TOSC = OSD oscillation cycle).
The display start position in the vertical direction for each block can
be selected from 512-step display positions in units of 1 TH ( TH =
HSYNC cycle).
Blocks are displayed in conformance with the following rules:
• When the display position of block 1 is overlapped with that of block
2 (Figure 8.11.5 (b)), the block 1 is displayed on the front.
• When another block display position appears while one block is
displayed (Figure 8.11.5 (c)), the block with a larger set value as
the vertical display start position is displayed.
(HP)
VP1
VP2
(a) Example when each block is separated
Block 1
Block 2
(HP)
VP1 = VP2
(b) Example when block 2 overlaps with block 1
Block 1
(Block 2 is not displayed)
(HP)
VP1
VP2
Block 1
Block 2
(c) Example when block 2 overlaps in process of block 1
Note: VP1 or VP2 indicates the vertical display start position of display block 1 or 2.
Fig. 8.11.5 Display Position
Rev.1.00 Apr 01, 2001 page 64 of 127
REJ03B0132-0100Z