MSM7652 datasheet(14/36 Pages) OKI

14 / 36 page

MSM7652

¡ Semiconductor

VALID DATA RANGE

According to the ITU Rec.656 standard, the pixel data immediately from SAV (4th word) to a

fixed value before EVA is valid.

The following figure shows the relationship between the input data at the CCIR Rec.656 format

and the sync, luminance, chrominance signals which are processed inside the encoder.

Y00

8'h10

Luminance signal separated from

input data

Y01 Y10 Y11

8'h10

ITU Rec.656 standard input data

Note) The values in parenthesis indicate values in PAL mode.

Cb0, Y00, Cr0, Y01, Cb1, Y10, Cr1, Y11....

BLANK_L internally generated to

assure the horizontal and vertical

periods

Cb0

8'h80

Chrominance signal separated

from input data

Composite signal

Cr0 Cb1 Cr1

8'h80

711Tclkx1 (702Tclkx1)

20Tclkx1 (20Tclkx1)

127Tclkx1 (142Tclkx1)

Sync signal BLANK_L generated

by input data

711Tclkx1 (702Tclkx1)

20Tclkx1 (20Tclkx1)

127Tclkx1 (142Tclkx1)

9Tclkx1 (16Tclkx1)

Sync signal HSYNC_L generated

by input data

63Tclkx1 (63Tclkx1) <Normal>

67Tclkx1 (67Tclkx1) <Colorstripe>

4Tclkx1

(4Tclkx1)

Sync signal VSYNC_L (1/2)

generated by input signal

1/2H

Sync signal VSYNC_L (0H)

generated by input signal

11Tclkx1 (4Tclkx1)

4Tclkx2

1716Tclkx2 (NTSC)/1728clkx2 (PAL)

1440T (NTSC/PAL)

136Tclkx1 (146Tclkx1)

4Tclkx2

Relationship between input data and sync signal, luminance signal, chrominance signals

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