AK4709 Datasheet, PDF (21/42 Pages) Asahi Kasei Microsystems – Low Power AV SCART Switch

[AK4709]
3. Video Block
■ Video Switch Control
The AK4709 has switches for TV and VCR. Each switch can be controlled via the 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 startup mode and standby mode.
(04H: D2-D0)
Mode
Shutdown
Encoder
CVBS+RGB
or Encoder YPbPr
Encoder Y/C 1
VTV2-0 bit
000
001
010
Encoder Y/C 2
011
VCR (default)
100
TV CVBS
101
(Reserved)
110
(Reserved)
111
Source of
Source of
TVVOUT pin
TVRC pin
(Hi-Z)
(Hi-Z)
ENCV pin
ENCRC pin
(Encoder CVBS
(Encoder Red,C
or Y)
or Pb)
ENCV pin
ENCRC pin
(Encoder Y)
(Encoder C)
ENCY pin
ENCC pin
(Encoder Y)
(Encoder C)
VCRVIN pin
VCRRC pin
(VCR CVBS
(VCR Red,C
or Y)
or Pb)
TVVIN pin
(TV CVBS)
(Hi-Z)
-
-
-
-
Table 10. TV video output (Note 27)
Source of
TVG pin
(Hi-Z)
ENCG pin
(Encoder Green
or Y)
(Hi-Z)
(Hi-Z)
VCRG pin
(VCR Green
or Y)
(Hi-Z)
-
-
Source of
TVB pin
(Hi-Z)
ENCB pin
(Encoder Blue
or Pr)
(Hi-Z)
(Hi-Z)
VCRB pin
(VCR Blue
or Pr)
(Hi-Z)
-
-
(04H: D5-D3)
Mode
VVCR2-0 bit
Source of
VCRVOUT pin
Shutdown
000
(Hi-Z)
ENCV pin
Encoder CVBS or Y/C 1
001
(Encoder CVBS
or Y)
ENCY pin
Encoder CVBS or Y/C 2
010
(Encoder CVBS
or Y)
TV CVBS (default)
011
TVVIN pin
(TV CVBS)
VCR
100
VCRVIN pin
(VCR CVBS)
(Reserved)
101
-
(Reserved)
110
-
(Reserved)
111
-
Table 11. VCR video output (Refer Note 27)
Source of
VCRC pin
(Hi-Z)
ENCRC pin
(Encoder C)
ENCC pin
(Encoder C)
(Hi-Z)
VCRRC pin
(VCR Red, C)
-
-
-
Note 27. When input the video signal via ENCRC pin or VCRRC pin, set CLAMP1-0 bits respectively.
MS1319-E-00
- 21 -
2011/07