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AK4709 Datasheet(PDF) 21 Page - Asahi Kasei Microsystems

Part No. AK4709
Description  Low Power AV SCART Switch
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Maker  AKM [Asahi Kasei Microsystems]
Homepage  http://www.akm.com
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AK4709 Datasheet(HTML) 21 Page - Asahi Kasei Microsystems

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[AK4709]
MS1319-
E-00
2011/07
- 21 -
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
VTV2-0 bit
Source of
TVVOUT pin
Source of
TVRC pin
Source of
TVG pin
Source of
TVB pin
Shutdown
000
(Hi-Z)
(Hi-Z)
(Hi-Z)
(Hi-Z)
Encoder
CVBS+RGB
or Encoder YPbPr
001
ENCV pin
(Encoder CVBS
or Y)
ENCRC pin
(Encoder Red,C
or Pb)
ENCG pin
(Encoder Green
or Y)
ENCB pin
(Encoder Blue
or Pr)
Encoder Y/C 1
010
ENCV pin
(Encoder Y)
ENCRC pin
(Encoder C)
(Hi-Z)
(Hi-Z)
Encoder Y/C 2
011
ENCY pin
(Encoder Y)
ENCC pin
(Encoder C)
(Hi-Z)
(Hi-Z)
VCR (default)
100
VCRVIN pin
(VCR CVBS
or Y)
VCRRC pin
(VCR Red,C
or Pb)
VCRG pin
(VCR Green
or Y)
VCRB pin
(VCR Blue
or Pr)
TV CVBS
101
TVVIN pin
(TV CVBS)
(Hi-Z)
(Hi-Z)
(Hi-Z)
(Reserved)
110
-
-
-
-
(Reserved)
111
-
-
-
-
Table 10. TV video output (Note 27)
(04H: D5-D3)
Mode
VVCR2-0 bit
Source of
VCRVOUT pin
Source of
VCRC pin
Shutdown
000
(Hi-Z)
(Hi-Z)
Encoder CVBS or Y/C 1
001
ENCV pin
(Encoder CVBS
or Y)
ENCRC pin
(Encoder C)
Encoder CVBS or Y/C 2
010
ENCY pin
(Encoder CVBS
or Y)
ENCC pin
(Encoder C)
TV CVBS (default)
011
TVVIN pin
(TV CVBS)
(Hi-Z)
VCR
100
VCRVIN pin
(VCR CVBS)
VCRRC pin
(VCR Red, C)
(Reserved)
101
-
-
(Reserved)
110
-
-
(Reserved)
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.


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