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參數(shù)資料
| 型號(hào)： | AK4704 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 2ch 24bit DAC with AV SCART switch |
| 中文描述： | 2通道24位DAC，具有影音SCART開關(guān) |
| 文件頁(yè)數(shù)： | 24/44頁(yè) |
| 文件大?。?/td> | 440K |
| 代理商： | AK4704 |
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ASAHI KASEI
AKM CONFIDENTIAL
[AK4704]
Rev. 0.5
2004/1
- 24 -
3. Video Block
Video Switch Control
The AK4704 has switches for TV, VCR and RF modulator. Each switches can be controlled via registers independently.
When AUTO bit = “1” or STBY bit = “1”, these switch setting are ignored and set to fixed configuration (loop-through
mode). Please refer the auto setup mode and standby mode.
(04H: D2-D0)
Source of
TVVOUT pin
Shutdown
000
(Hi-Z)
Encoder CVBS /RGB
001
ENCV pin
Encoder Y/C 1
010
ENCV pin
Encoder Y/C 2
011
ENCY pin
VCR (default)
100
VCRVIN pin
TV CVBS
101
TVVIN pin
(reserved)
110
-
(reserved)
111
-
Mode
VTV2-0 bit
Source of
TVRC pin
(Hi-Z)
ENCRC pin
ENCRC pin
ENCC pin
VCRRC pin
(Hi-Z)
-
-
Source of
TVG pin
(Hi-Z)
ENCG pin
Hi-Z
Hi-Z
VCRG pin
(Hi-Z)
-
-
Source of
TVB pin
(Hi-Z)
ENCB pin
(Hi-Z)
(Hi-Z)
VCRB pin
(Hi-Z)
-
-
(please refer notes)
Table 12. TV video output
(04H: D5-D3)
Mode
VVCR2-0 bit
Source of
VCRVOUT pin
(Hi-Z)
ENCV pin
ENCY pin
TVVIN pin
VCRVIN pin
-
-
-
Source of
VCRC pin
(Hi-Z)
ENCRC pin
ENCC pin
(Hi-Z)
VCRRC pin
-
-
-
(please refer notes)
Shutdown
000
001
010
011
100
101
110
111
Encoder CVBS or Y/C 1
Encoder CVBS or Y/C 2
TV CVBS (default)
VCR
(reserved)
(reserved)
(reserved)
Table 13. VCR video output
(04H: D7-D6)
Mode
VRF1-0
bit
00
Source of
RFV pin
ENCV pin
ENCG pin
(Note: 22)
VCRVIN pin
(Hi-Z)
(when YC bit=0. please refer notes)
Encoder CVBS1
Encoder CVBS2
01
VCR (default)
Shutdown
10
11
Table 14. RF video output
Note: 21: When input the video signal via ENCRC pin or VCRRC pin, set CLAMP1-0 bits respectively.
Note: 22 When VTV2-0 bit =“001”, TVG bit =“1” and VRF1-0 bit =“01”, RFV pin output is same
as TVG pin output (Encoder G).
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