AK4703 Datasheet, PDF (16/38 Pages) Asahi Kasei Microsystems – AV SCART switch

ASAHI KASEI
AKM CONFIDENTIAL
[AK4703]
3. Video Block
„ Video Switch Control
The AK4703 has switches for TV, VCR and RF modulator. Each switch can be controlled via registers independently.
When AUTO bit = “1” or STBY bit = “1”, these switches setting is ignored and set to fixed configuration (loop-through
mode). Please refer the auto setup mode and standby mode.
(04H: D2-D0)
Mode
Shutdown
Encoder CVBS /RGB
Encoder Y/C 1
Encoder Y/C 2
VCR (default)
TV CVBS
(Reserved)
(Reserved)
VTV2-0 bit
Source of
TVVOUT pin
Source of
TVRC pin
000
(Hi-Z)
(Hi-Z)
001
ENCV pin
ENCRC pin
010
ENCV pin
ENCRC pin
011
ENCY pin
ENCC pin
100
VCRVIN pin VCRRC pin
101
TVVIN pin
(Hi-Z)
110
-
-
111
-
-
Table 6. TV video output (Please refer notes)
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)
-
-
(04H: D5-D3)
Mode
VVCR2-0 bit
Source of
VCRVOUT pin
Shutdown
000
(Hi-Z)
Encoder CVBS or Y/C 1
001
ENCV pin
Encoder CVBS or Y/C 2
010
ENCY pin
TV CVBS (default)
011
TVVIN pin
VCR
100
VCRVIN pin
(Reserved)
101
-
(Reserved)
110
-
(Reserved)
111
-
Table 7. VCR video output (Please refer notes)
Source of
VCRC pin
(Hi-Z)
ENCRC pin
ENCC pin
(Hi-Z)
VCRRC pin
-
-
-
(04H: D7-D6)
Mode
VRF1-0 bit Source of RFV pin
Encoder CVBS1
00
ENCV pin
Encoder CVBS2
01
ENCG pin
(Note 2)
VCR (Default)
10
VCRVIN pin
Shutdown
11
(Hi-Z)
Table 8. RF video output
Note 1. When input the video signal via ENCRC pin or VCRRC pin, set CLAMP1-0 bits respectively.
Note 2. When VTV2-0 bit = “001”, TVG bit = “1” and VRF1-0 bit = “01”, RFV pin output is same as TVG pin
output (Encoder G).
Rev. 0.1
- 16 -
2004/03