ADV7188BSTZ Analog Devices Inc, ADV7188BSTZ Datasheet - Page 44

• Manufacturer Part Number: ADV7188BSTZ
• Description: IC DECODER VID MULTIFORM 80LQFP
• Manufacturer: Analog Devices Inc
• Type: Video Decoderr

Specifications of ADV7188BSTZ

• Applications: Set-Top Boxes, Video Players, Recorders
• Voltage - Supply, Analog: 3.15 V ~ 3.45 V
• Voltage - Supply, Digital: 1.65 V ~ 2 V
• Mounting Type: Surface Mount
• Package / Case: 80-LQFP
• Resolution (bits): 12bit
• Input Format: Analog
• Output Format: Digital
• Adc Sample Rate: 54MSPS
• No. Of Input Channels: 12
• Supply Voltage Range: 3V To 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

ADV7188
In a 16-/20-bit output interface where Y and Cr/Cb are delivered
via separate data buses, the AV code is over the whole 16/20 bits.
The SD_DUP_AV bit allows the user to replicate the AV codes
on both buses; therefore, the full AV sequence can be found on
the Y data bus and on the Cr/Cb data bus (see Figure 25).
0 (default)—The AV codes are in single fashion (to suit 8-/10-bit
interleaved data output).
1—The AV codes are duplicated (for 16-/20-bit interfaces).
VBI_EN, Vertical Blanking Interval Data Enable,
Address 0x03 [7]
The VBI enable bit allows data such as intercast and closed
caption data to be passed through the luma channel of the
decoder with a minimal amount of filtering. All data for Line 1
to Line 21 is passed through and available at the output port.
The ADV7188 does not blank the luma data, but automatically
switches all filters along the luma data path into their widest
bandwidth. For active video, the filter settings for YSH and YPK
are restored.
Cr/Cb DATA BUS
Y DATA BUS
FF
FF
16-/20-BIT INTERFACE
AV CODE SECTION
SD_DUP_AV = 1
00
00
00
00
AV
AV
Figure 25. AV Code Duplication Control
Cb
Y
Rev. A | Page 44 of 112
AV CODE SECTION
00
FF
16-/20-BIT INTERFACE
Refer to the BL_C_VBI, Blank Chroma During VBI,
Address 0x04 [2] section for information on the chroma path.
0 (default)—All video lines are filtered and scaled.
1—Only the active video region is filtered and scaled.
BL_C_VBI, Blank Chroma During VBI, Address 0x04 [2]
Setting BL_C_VBI high, blanks the Cr and Cb values of all
VBI lines. This is done to prevent data that arrives during VBI
from being decoded as color and output through Cr and Cb. As
a result, it is possible to send VBI lines into the decoder, and
then output them undistorted through an encoder. Without this
blanking, any incorrectly decoded color would be encoded by
the video encoder and therefore the VBI lines would be distorted.
0—Decodes and outputs color during VBI.
1 (default)—Blanks Cr and Cb values during VBI.
AV
00
Cb
Y
SD_DUP_AV = 0
INTERLEAVED
Cb/Y/Cr/Y
FF
AV CODE SECTION
8-/10-BIT INTERFACE
00
00
AV
Cb