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參數資料
| 型號： | AD7183 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Advanced Video Decoder with 10-Bit ADC and Component Input Support |
| 中文描述： | 先進的視頻解碼器，10位ADC和組件輸入支持 |
| 文件頁數： | 31/41頁 |
| 文件大?。?/td> | 484K |
| 代理商： | AD7183 |
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REV. 0
ADV7183
–31–
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
0
ACLKN[2:0]
*
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
0
0
0
0
Set to Zero
Color Burst Line
Start Line 24 Color Burst Line
Active Video
Active Video (<304) PAL, (<264) NTSC
Active Video (<304) PAL, (<256) NTSC
Active Video (<319/320) PAL, (<273/274) NTSC
1
1
1
1
0
1
Invalid
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
CAGC[1:0]
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Register Setting
1
0
0
1
1
0
1
0
1
Manual Fixed Gain; use CMG [11:0]
Use Luma Gain for Chroma
Automatic Gain; Based on Color Burst
Freeze Chroma Gain
Set to One
Manual Fixed Gain
AGC No Override through White Peak; Manual IRE
Control
4
AGC Auto Override through White Peak; Manual
IRE Control
AGC No Override through White Peak; Manual IRE
Control
4
AGC Auto Override through White Peak; Manual
IRE Control
4
AGC Active Video with White Peak
AGC Active Video with Average Video
Freeze Gain
Set to One
RESERVED
LAGC[2:0]
1
1
2
0
0
0
0
0
1
3
0
1
0
4
0
1
1
1
0
0
1
1
1
0
1
1
1
0
1
RESERVED
1
NOTES
1
Chroma Automatic Gain Control. Selects the basic mode of operation for the AGC in the chroma path.
2
Luma Automatic Gain Control. Selects the mode of operation for the gain control in the luma path.
3
Use LMG[11:0].
4
Blank level to sync tip.
Table XXXVIII. Chroma Gain Control 1 Register (Subaddress 2D)
Bit Description
CMG[11:8]
RESERVED
CAGT[1:0]
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Register Setting
X
X
1
1
0
0
0
1
1
0
1
1
1
X
X
Set to One
Slow (TC = 2 sec)
Medium (TC = 1 sec)
Fast (TC = 0.2 sec)
Dependent on VID_QUAL
2
NOTES
1
Chroma 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.
2
Chroma 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]
*
X
X
X
X
*
Chroma Manual Gain. Lower 8 bits, see CMG [11:8] for description.
X
X
X
X
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