ADV7189BKSTZ datasheet(49/104 Pages) AD

Part #	ADV7189BKSTZ

Description	Multiformat SDTV Video Decoder

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ADV7189B

Rev. B | Page 49 of 104

CRC_ENABLE CRC CGMS-A Sequence, Address 0xB2[2]

For certain video sources, the CRC data bits can have an invalid

format. In such circumstances, the CRC checksum validation

procedure can be disabled. The CGMSD bit goes high if the

rising edge of the start bit is detected within a time window.

When CRC_ENABLE is 0, no CRC check is performed.

The CGMSD bit goes high if the rising edge of the start bit

is detected within a time window.

When CRC_ENABLE is 1 (default), CRC checksum is used to

validate the CGMS sequence. The CGMSD bit goes high for a

valid checksum. ADI recommended setting.

Wide Screen Signaling Data

WSS1[7:0], Address 0x91[7:0], WSS2[7:0], Address

0x92[7:0]

217H

Figure 31 shows the bit correspondence between the analog

video waveform and the WSS1/WSS2 registers. WSS2[7:6]

are undetermined and should be masked out by software.

EDTV Data Registers

EDTV1[7:0], Address 0x93[7:0],

EDTV2[7:0], Address 0x94[7:0],

EDTV3[7:0], Address 0x95[7:0]

218H

Figure 32 shows the bit correspondence between the analog

video waveform and the EDTV1/EDTV2/EDTV3 registers.

EDTV3[7:6] are undetermined and should be masked out by

software. EDTV3[5] is reserved for future use and, for now,

contains a 0. The three LSBs of the EDTV waveform are

currently not supported.

ACTIVE

VIDEO

WSS2[5:0]

WSS1[7:0]

RUN-IN

SEQUENCE

START

CODE

0

1

2

3

4

5

6

7

0

1

2

3

4

5

11.0

μs

38.4

μs

42.5

μs

Figure 31. WSS Data Extraction

Table 58. WSS Access Information

Signal Name

Register Location

Address

Register Default Value

WSS1[7:0]

WSS 1[7:0]

145d

0x91

Readback Only

WSS2[5:0]

WSS 2[5:0]

146d

0x92

Readback Only

EDTV1[7:0]

EDTV2[7:0]

EDTV3[5:0]

NOT SUPPORTED

01

3

4

5

6

7

0

1

2 3 4

5

6

7

0

1

2

345

2

Figure 32. EDTV Data Extraction

Table 59. EDTV Access Information

Signal Name

Register Location

Address

Register Default Value

EDTV1[7:0]

EDTV 1[7:0]

147d

0x93

Readback Only

EDTV2[7:0]

EDTV 2[7:0]

148d

0x94

Readback Only

EDTV3[7:0]

EDTV 3[7:0]

149d

0x95

Readback Only

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