M37271MF-252SP datasheet(52/97 Pages) MITSUBISHI

52 / 97 page

MITSUBISHI MICROCOMPUTERS

M37271MF-XXXSP

M37271EF-XXXSP, M37271EFSP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER

and ON-SCREEN DISPLAY CONTROLLER

(2) Display Position

The display positions of characters are specified in units called a

“block.” There are 16 blocks, blocks 1 to 16. Up to 40 characters can

be displayed in each block (refer to (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 = oscillating cycle for OSD).

The display position in the vertical direction for each block can be

selected from 1024-step display positions in units of 1 TH ( TH = HSYNC

cycle).

Blocks are displayed in conformance with the following rules:

1 When the display position is overlapped with another block

(Figure 56, (b)), a lower block number (1 to 16) is displayed on

the front.

2 When another block display position appears while one block is

displayed (Figure 56 (c)), the block with a larger set value as the

vertical display start position is displayed. However, do not dis-

play block with the dot size of 2TC ! 2H or 3TC ! 3H during dis-

play period (V) of another block.

V In the case of OSD mode block: 20 dots in vertical from the verti-

cal display start position.

V In the case of CCD or EXOSD mode block: 26 dots in vertical from

the vertical display start position.

Fig. 56. Display position

(HR)

VP12, VP22

Block 1

Block 2

(a) Example when each block is separated

VP13, VP23

Block 3

(HR)

VP11, VP21

VP12, VP22

Block 1

(b) Example when block 3 overlaps with block 1

(Block 3 is not displayed)

(HR)

VP11, VP21

VP12, VP22

Block 1

Block 3

Note: VP1i or VP2i (i : 1 to 6) indicates the contents of vertical position registers 1i or 2i.

VP11, VP21

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