6V7 Datasheet, PDF (185/298 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

M306V7MG/MH/MJ/MJA-XXXFP, M306V7FG/FH/FJ/FJAFP
2.16.2 Display Position
The display positions of characters are specified by a block. There are 16 blocks, blocks 1 to 16. Up to 32
characters (32-character mode)/42 characters (42-character mode)/ can be displayed in each block (re-
fer to 2.16.6 Memory for OSD).
The display position of each block can be set in both horizontal and vertical directions by software.
The display position in the horizontal direction can be selected for all blocks in common from 256-step
display positions in units of 4 TOSC (TOSC = OSD oscillation cycle).
The display position in the vertical direction for each block can be selected from 1024-step display posi-
tions in units of 1 TH ( TH = HSYNC cycle).
Blocks are displayed in conformance with the following rules:
• When the display position is overlapped with another block in the same layer (Figure 2.16.8 (b)), a low
block number (1 to 16) is displayed on the front.
• When another block display position appears while one block is displayed in the same layer (Figure
2.16.8 (c)), the block with a larger set value as the vertical display start position is displayed. However,
do not display block with the dot size of 2TC ✕ 2H or 3TC ✕ 3H during display period (✽) of another block.
✽ In the case of OSDS/P mode block: 20 dots in vertical from the vertical display start position.
✽ In the case of OSDL mode block: 32 dots in vertical from the vertical display start position.
✽ In the case of CC or CDOSD mode block: 26 dots in vertical from the vertical display start position.
HP
VP1
Block 1
VP2
Block 2
VP3
Block 3
(a) Example when each block is separated
HP
VP1 = VP2
(b) Example when block 2 overlaps with block 1
HP
Block 1
(Block 2 is not displayed)
VP1
VP2
Block 1
Block 2
(c) Example when block 2 overlaps in process of block 1
Note: VPi (i = 1 to 16) indicates the vertical display start position of display block i.
Figure 2.16.8 Display position
Rev.1.00 May 18, 2004 page 185 of 296