[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)
Source of
TVVOUT pin
(Hi-Z)
ENCV pin
(Encoder CVBS
or Y)
Source of
TVRC pin
(Hi-Z)
Source of
TVG pin
(Hi-Z)
Source of
TVB pin
(Hi-Z)
ENCB pin
(Encoder Blue
or Pr)
Mode
VTV2-0 bit
000
Shutdown
Encoder
CVBS+RGB
or Encoder YPbPr
ENCRC pin
(Encoder Red,C
or Pb)
ENCG pin
(Encoder Green
or Y)
001
ENCV pin
(Encoder Y)
ENCY pin
(Encoder Y)
VCRVIN pin
(VCR CVBS
or Y)
TVVIN pin
(TV CVBS)
-
ENCRC pin
(Encoder C)
ENCC pin
(Encoder C)
VCRRC pin
(VCR Red,C
or Pb)
Encoder Y/C 1
Encoder Y/C 2
010
011
(Hi-Z)
(Hi-Z)
(Hi-Z)
(Hi-Z)
VCRG pin
(VCR Green
or Y)
VCRB pin
(VCR Blue
or Pr)
VCR (default)
TV CVBS
100
101
(Hi-Z)
(Hi-Z)
(Hi-Z)
(Reserved)
(Reserved)
110
111
-
-
-
-
-
-
-
Table 10. TV video output (Note 27)
(04H: D5-D3)
Source of
VVCR2-0 bit
Source of
VCRC pin
(Hi-Z)
Mode
VCRVOUT pin
Shutdown
000
001
(Hi-Z)
ENCV pin
(Encoder CVBS
or Y)
ENCRC pin
(Encoder C)
Encoder CVBS or Y/C 1
Encoder CVBS or Y/C 2
ENCY pin
(Encoder CVBS
or Y)
ENCC pin
(Encoder C)
010
TVVIN pin
(TV CVBS)
VCRVIN pin
(VCR CVBS)
-
TV CVBS (default)
VCR
011
100
(Hi-Z)
VCRRC pin
(VCR Red, C)
(Reserved)
(Reserved)
(Reserved)
101
110
111
-
-
-
-
-
Table 11. VCR video output (Refer Note 27)
Note 27. When input the video signal via ENCRC pin or VCRRC pin, set CLAMP1-0 bits respectively.
MS1319-E-00
2011/07
- 21 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
