AK4707 Datasheet, PDF (21/42 Pages) Asahi Kasei Microsystems – AV SCART Switch

ASAHI KASEI
[AK4707]
3. Video Block
„ Video Switch Control
The AK4707 has switches for TV and VCR. 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). 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
Source of
TVG pin
000
(Hi-Z)
(Hi-Z)
(Hi-Z)
001
ENCV pin
ENCRC pin
ENCG pin
(Encoder CVBS) (Encoder Red,C) (Encoder Green)
010
ENCV pin
(Encoder Y)
ENCRC pin
(Encoder C)
Hi-Z
011
ENCY pin
(Encoder Y)
ENCC pin
(Encoder C)
Hi-Z
100
VCRVIN pin
(VCR CVBS)
VCRRC ̸̿̽
(VCR Red,C)
VCRG pin
(VCR Green)
101
TVVIN pin
(TV CVBS)
(Hi-Z)
(Hi-Z)
110
-
-
-
111
-
-
-
Table 7. TV video output (Refer Note 18.)
Source of
TVB pin
(Hi-Z)
ENCB pin
(Encoder Blue)
(Hi-Z)
(Hi-Z)
VCRB pin
(VCR Blue)
(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)
Encoder CVBS or Y/C 2
010
ENCY pin
(Encoder CVBS)
TV CVBS (default)
011
TVVIN pin
(TV CVBS)
VCR
100
VCRVIN pin
(VCR CVBS)
(Reserved)
101
-
(Reserved)
110
-
(Reserved)
111
-
Table 8. VCR video output (Refer Note 18.)
Note 18. When input the video signal via ENCRC pin or VCRRC pin, set CLAMP1-0 bits respectively.
MS0551-E-00
- 21 -
2006/10