ADV601

–22–

REV. 0

• Active Area Control

Four registers HSTART (horizontal start), HEND (horizon-

tal end), VSTART (vertical start) and VEND (vertical end)

determine the active video area. The maximum active video

area is 768 by 288 pixels for a single field.

• Video Format

This control determines the video format that is supported. In

general, the goal of the various video formats is to support

glueless interfaces to the wide variety of video formats periph-

eral components expect. This control is maintained by the

host processor. Table VII shows a synopsis of the supported

video formats. Definitions of each format can be found later

in this section. For Video Interface pins descriptions, see the

Pin Function Descriptions.

Table VII. Component Digital Video Formats

Nominal

Bit/

Color

Data Rate

Master/

Format

Name

Component

Space

Sampling

(MHz)

Slave

I/F Width

Number

CCIR-656

8 or 10

YCrCb

4:2:2

27

Master

8 or 10

0x0

Multiplex Philips

8 or 10

YUV

4:2:2

<=29.5

Either

8 or 10

0x2

Philips

8 or 10

YUV

4:2:2

29.5

Either

8 or 10

0x3

Gray Scale

8, 10 or 12

Luma

4:0:0

13.5

Either

8, 10, or 12

0x8

Clocks and Strobes

All video data, whether 1 or 2 “lanes” of video are used, are

synchronous to the video clock (VCLK). The rising edge of

VCLK is used to clock all data into the ADV601.

Synchronization and Blanking Pins

Three signals, which can be configured as inputs or outputs, are

used for video frame and field horizontal synchronization and

blanking. These signals are VSYNC, HSYNC, and FIELD.

VDATA Pins Functions With Differing Video Interface Formats

The functionality of the Video Interface pins depends on the

current video format. Table VIII defines how Video data pins

are used for the various formats.

Table VIII. VDATA[0:19] Pin Functions Under CCIR-656, Multiplex Philips, Philips, and Gray Scale Video Interfaces

1

VDATA[19:0] Pins

CCIR-656

Multiplex Philips

Philips

Gray Scale

19

N/C

N/C

Chrominance Data9

N/C

18

N/C

N/C

Chrominance Data8

N/C

17

N/C

N/C

Chrominance Data7

N/C

16

N/C

N/C

Chrominance Data6

N/C

15

N/C

N/C

Chrominance Data5

N/C

14

N/C

N/C

Chrominance Data4

N/C

13

N/C

N/C

Chrominance Data3

N/C

12

N/C

N/C

Chrominance Data2

N/C

11

N/C

N/C

Chrominance Data1

Data11

10

N/C

N/C

Chrominance Data0

Data10

9

Data9

Data9

Luminance Data9

Data9

8

Data8

Data8

Luminance Data8

Data8

7

Data7

Data7

Luminance Data7

Data7

6

Data6

Data6

Luminance Data6

Data6

5

Data5

Data5

Luminance Data5

Data5

4

Data4

Data4

Luminance Data4

Data4

3

Data3

Data3

Luminance Data3

Data3

2

Data2

Data2

Luminance Data2

Data2

1

Data1

Data1

Luminance Data1

Data1

0

Data0

Data0

Luminance Data0

Data0

NOTE

through a resistor to ground. Also, N/C for an entry in this table indicates that the pin is never used for a particular video format. This nomenclature is consistent

with the Video Format Descriptions found later in this section. Note that Data0 is always the LSB for all formats.