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AD7183 bảng dữ liệu(PDF) 31 Page - Analog Devices

tên linh kiện AD7183
Giải thích chi tiết về linh kiện  Advanced Video Decoder with 10-Bit ADC and Component Input Support
PDF  40 Pages
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nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
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AD7183 bảng dữ liệu(HTML) 31 Page - Analog Devices

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ADV7183
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Table XXXVI. Auto Clock Control Register (Subaddress 2B)
Bit Description Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Register Setting
RESERVED
00000
Set to Zero
ACLKN[2:0]
*
0
0
0
Color Burst Line
0
0
1
Start Line 24 Color Burst Line
0
1
0
Active Video
0
1
1
Active Video (<304) PAL, (<264) NTSC
1
0
0
Active Video (<304) PAL, (<256) NTSC
1
0
1
Active Video (<319/320) PAL, (<273/274) NTSC
1
1
0
Invalid
1
1
1
Invalid
*Automatic Clock Generator Mode. Influences the mode of operation for the LLC. Only when not in Manual Mode.
Table XXXVII. AGC Mode Control Register (Subaddress 2C)
Bit Description
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0Register Setting
CAGC[1:0]
1
0
0
Manual Fixed Gain; use CMG [11:0]
0
1
Use Luma Gain for Chroma
1
0
Automatic Gain; Based on Color Burst
1
1
Freeze Chroma Gain
RESERVED
1
1
Set to One
LAGC[2:0]
2
000
Manual Fixed Gain
3
0
0
1
AGC No Override through White Peak; Manual IRE
Control4
0
1
0
AGC Auto Override through White Peak; Manual
IRE Control
4
0
1
1
AGC No Override through White Peak; Manual IRE
Control
4
1
0
0
AGC Auto Override through White Peak; Manual
IRE Control
4
1
0
1
AGC Active Video with White Peak
1
1
0
AGC Active Video with Average Video
1
1
1
Freeze Gain
RESERVED
1
Set to One
NOTES
1Chroma Automatic Gain Control. Selects the basic mode of operation for the AGC in the chroma path.
2Luma Automatic Gain Control. Selects the mode of operation for the gain control in the luma path.
3Use LMG[11:0].
4Blank level to sync tip.
Table XXXVIII. Chroma Gain Control 1 Register (Subaddress 2D)
Bit Description
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0Register Setting
CMG[11:8]
1
XXXX
RESERVED
1
1
Set to One
CAGT[1:0]
2
0
0
Slow (TC = 2 sec)
01
Medium (TC = 1 sec)
10
Fast (TC = 0.2 sec)
11
Dependent on VID_QUAL
NOTES
1Chroma Manual Gain. Can be used to program a desired manual chroma gain or read back the actual used gain value. CAGC[1:0] settings will decide in which mode
CMG[11:0] will operate.
2Chroma Automatic Gain Timing. Allows adjustment of the Chroma AGC tracking speed. Will only have effect if CAGC[1:0] is set to auto gain (10b).
Table XXXIX. Chroma Gain Control 2 Register (Subaddress 2E)
Bit Description Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Register Setting
CMG[7:0]
*
XXXXXXXX
*Chroma Manual Gain. Lower 8 bits, see CMG [11:8] for description.



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