ADV7180WBSTZ datasheet(67/120 Pages) AD

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Data Sheet

ADV7180

Rev. G | Page 67 of 120

Table 85. GS/VPS/PDC/UTC Readback Registers1

Signal Name

Dec Address (User Sub Map)

Hex Address (User Sub Map)

GS_VPS_PDC_UTC_BYTE_0[7:0]

VDP_GS_VPS_PDC_UTC_0[7:0]

132

0x84

GS_VPS_PDC_UTC_BYTE_1[7:0]

VDP_GS_VPS_PDC_UTC_1[7:0]

133

0x85

GS_VPS_PDC_UTC_BYTE_2[7:0]

VDP_GS_VPS_PDC_UTC_2[7:0]

134

0x86

GS_VPS_PDC_UTC_BYTE_3[7:0]

VDP_GS_VPS_PDC_UTC_3[7:0]

135

0x87

VPS_PDC_UTC_BYTE_4[7:0]

VDP_VPS_PDC_UTC_4[7:0]

136

0x88

VPS_PDC_UTC_BYTE_5[7:0]

VDP_VPS_PDC_UTC_5[7:0]

137

0x89

VPS_PDC_UTC_BYTE_6[7:0]

VDP_VPS_PDC_UTC_6[7:0]

138

0x8A

VPS_PDC_UTC_BYTE_7[7:0]

VDP_VPS_PDC_UTC_7[7:0]

139

0x8B

VPS_PDC_UTC_BYTE_8[7:0]

VDP_VPS_PDC_UTC_8[7:0]

140

0x8C

VPS_PDC_UTC_BYTE_9[7:0]

VDP_VPS_PDC_UTC_9[7:0]

141

0x8D

VPS_PDC_UTC_BYTE_10[7:0]

VDP_VPS_PDC_UTC_10[7:0]

142

0x8E

VPS_PDC_UTC_BYTE_11[7:0]

VDP_VPS_PDC_UTC_11[7:0]

143

0x8F

VPS_PDC_UTC_BYTE_12[7:0]

VDP_VPS_PDC_UTC_12[7:0]

144

0x90

The default value does not apply to readback registers.

VBI System 2

The user has an option of using a different VBI data slicer called

VBI System 2. This data slicer is used to decode Gemstar and

closed caption VBI signals only.

Using this system, the Gemstar data is available only in the

ancillary data stream. A special mode enables one line of data to

be read back through I2C.

Gemstar Data Recovery

The Gemstar-compatible data recovery block (GSCD) supports

1× and 2× data transmissions. In addition, it can serve as a closed

caption decoder. Gemstar-compatible data transmissions can

occur only in NTSC. Closed caption data can be decoded in

both PAL and NTSC.

The block can be configured via I2C as follows:

•

GDECEL[15:0] allows data recovery on selected video lines

on even fields to be enabled or disabled.

•

GDECOL[15:0] enables the data recovery on selected lines

for odd fields.

•

GDECAD[0] configures the way in which data is

embedded in the video data stream.

The recovered data is not available through I2C but is inserted into

the horizontal blanking period of an ITU-R BT.656-compatible

data stream. The data format is intended to comply with the

recommendation by the International Telecommunications

Union, ITU-R BT.1364. For more information, visit the

International Telecommunication Union website. See Figure 50.

GDE_SEL_OLD_ADF, Address 0x4C[3], User Sub Map

The ADV7180 has a new ancillary data output block that

can be used by the VDP data slicer and the VBI System 2

data slicer. The new ancillary data formatter is used by setting

GDE_SEL_OLD_ADF to 0 (default). See Table 74 and Table 75

for information about how the data is packaged in the ancillary

data stream when this bit is set low.

To use the old ancillary data formatter (to be backward compatible

with the ADV7183B), set GDE_SEL_OLD_ADF to 1. The ancillary

data format in this section refers to the ADV7183B-compatible

ancillary data formatter.

Setting GDE_SEL_OLD_ADF to 0 (default) enables a new

ancillary data system for use with the VDP and VBI System 2.

Setting GDE_SEL_OLD_ADF to 1 enables the old ancillary

data system for use with the VBI System 2 only (ADV7183B

compatible).

The format of the data packet depends on the following criteria:

•

Transmission is 1× or 2×.

•

Data is output in 8-bit or 4-bit format (see the description

of the bit).

•

Data is closed caption (CCAP) or Gemstar compatible.

Data packets are output if the corresponding enable bit is set

(see the GDECEL[15:0], Gemstar Decoding Even Lines,

Address 0x48[7:0], Address 0x49[7:0] and the GDECOL[15:0],

Gemstar Decoding Odd Lines, Address 0x4A[7:0], Address

0x4B[7:0] sections), and the decoder detects the presence of data.

For video lines where no data is decoded, no data packet is output,

even if the corresponding line enable bit is set.

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