CAT6611 データシートの表示（PDF） - Unspecified

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CAT6611

Single-Link HDMI Transmitter

Unspecified 

CAT6611

CCIR-656 Format

The CCIR-656 format is yet another variation of the YCbCr formats. The bus width is further reduced

by half compared from the previous YCbCr 4:2:2 formats, to either 8-bit, 10-bit or 12-bit. To

compensate for the halving of data bus, PCLK is doubled. With the double-rate input clock, luminance

channel (Y) and chroma channels (Cb or Cr) are alternated. CAT6611 supports CCIR-656 format of up

to 720p or 1080i, with the doubled-rate clock running at 148.5MHz. CCIR-656 format supports

embedded syncs only. Figure 8 gives an example of 8-bit CCIR-656. 10-bit and 12-bit versions are

similar.

Pin Name

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

D12

D13

D14

D15

D16

D17

D18

D19

D20

D21

D22

D23

HSYNC

VSYNC

DE

CCIR-656 8-bit

1st PCLK 2nd PCLK

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

C0

Y0

C1

Y1

C2

Y2

C3

Y3

C4

Y4

C5

Y5

C6

Y6

C7

Y7

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

CCIR-656 10-bit

1st PCLK 2nd PCLK

grounded grounded

grounded grounded

C0

Y0

C1

Y1

grounded grounded

grounded grounded

grounded grounded

grounded grounded

C2

Y2

C3

Y3

C4

Y4

C5

Y5

C6

Y6

C7

Y7

C8

Y8

C9

Y9

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

Table 7. Mappings of CCIR-656

CCIR-656 12-bit

Pixel#2N Pixel#2N+1

C0

Y0

C1

Y1

C2

Y2

C3

Y3

grounded grounded

grounded grounded

grounded grounded

grounded grounded

C4

Y4

C5

Y5

C6

Y6

C7

Y7

C8

Y9

C9

Y9

C10

Y10

C11

Y11

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

grounded grounded

SAV

Pixel0

Pixel1

Pixel2

...

blank

D[23:16]

D[15:8]

FF

00

00

XY

Cbpix0

[7:0]

Ypix0

[7:0]

Crpix0

[7:0]

Ypix1

[7:0]

Cbpix2

[7:0]

Ypix2

[7:0]

....

val

D[7:0]

PCLK

DE

H/VSYNC

Figure 8. 8-bit CCIR-656

The CAT logo is a registered trademark of Chip Advanced Technology

2007 Chip Advanced Technology Inc. – All Right Reserved.

June-2007 Rev:1.0a 21/29

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