Renesas PCA7429G02 Informations techniques télécharger pdf (Page 87)

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

and ON-SCREEN DISPLAY CONTROLLER

M37272M6/M8–XXXSP/FP, M37272MA–XXXSP

M37272E8SP/FP, M37272EFSP

MITSUBISHI MICROCOMPUTERS

Rev. 1.3

8.11.10 Multiline Display

This microcomputer can ordinarily display 2 lines on the CRT screen

by displaying 2 blocks at different vertical positions. In addition, it can

display up to 16 lines by using OSD interrupts.

An OSD interrupt request occurs at the point at which display of each

block has been completed. In other words, when a scanning line

reaches the point of the display position (specified by the vertical

position registers) of a certain block, the character display of that

block starts, and an interrupt occurs at the point at which the scan-

ning line exceeds the block.

Notes 1: An OSD interrupt does not occur at the end of display when the block

is not displayed. In other words, if a block is set to off display by the

display control bit of the block control register (addresses 00D2

16,

00D3

16), an OSD interrupt request does not occur (refer to Figure

8.11.23 (A)).

2: When another block display appeares while one block is displayed,

an OSD interrupt request occurs only once at the end of the another

block display (refer to Figure 8.11.23 (B)).

3: On the screen setting window, an OSD interrupt occurs even at the

end of the CC mode block (off display) out of window (refer to Figure

8.11.23 (C)).

Fig. 8.11.23 Note on Occurence of OSD Interrupt

(B) (C)

Block 1 (on display)

Block 2 (on display)

Block 1’ (on display)

Block 2’ (on display)

Block 1 (on display)

Block 2 (on display)

Block 1’ (off display)

Block 2’ (off display)

“OSD interrupt request”

Block 1

Block 2

“OSD interrupt request”

Block 1

Block 2

Block 1’

On display (OSD interrupt request occurs

at the end of block display)

Off display (OSD interrupt request does

not occur at the end of block display)

In CC mode

Window

“OSD interrupt request”

(A)

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 144 145

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Renesas PCA7429G02 Informations techniques Page 87

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