AK4705 Datasheet, PDF (26/50 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV SCART Switch

[AK4705]
3. Video Block
■ Video Switch Control
The AK4705 has switches for TV, VCR and RF modulator. Each switches can be controlled via registers independently.
When AUTO bit = “1” or STBY bit = “1”, these switch setting are ignored and set to fixed configuration (loop-through
mode). Please refer to the auto setup mode and standby mode.
(04H: D2-D0)
Mode
Shutdown
Encoder CVBS+RGB
or Encoder YPbPr
Encoder Y/C 1
Encoder Y/C 2
VCR
TV CVBS
(reserved)
(reserved)
VTV2-0
bit
000
001
010
011
100
101
110
111
Source of
Source of
Source of
Source of
TVVOUT pin TVRC pin
TVG pin
TVB pin
(Hi-Z)
(Hi-Z)
(Hi-Z)
(Hi-Z)
ENCV pin. ENCRC pin. ENCG pin. ENCB pin.
Encoder CVBS Encoder Red,C Encoder Green Encoder Blue
or Y.
or Pb.
or Y.
or Pr.
ENCV pin.
Encoder Y.
ENCRC pin.
Encoder C.
(Hi-Z)
(Hi-Z)
ENCY pin.
Encoder Y.
ENCC pin.
Encoder C.
(Hi-Z)
(Hi-Z)
VCRVIN pin. VCRRC pin. VCRG pin. VCRB pin.
VCR CVBS VCR Red,C VCR Green VCR Blue (default)
or Y.
or Pb.
or Y.
or Pr.
TVVIN pin.
TV CVBS.
(Hi-Z)
(Hi-Z)
(Hi-Z)
-
-
-
-
-
-
-
-
(Note: 18, Note: 19)
Table 13. TV video output
(04H: D5-D3)
Mode
Shutdown
Encoder CVBS or Y/C
1
Encoder CVBS or Y/C
2
TV CVBS
VCR
(reserved)
(reserved)
(reserved)
VVCR2-0 bit
000
001
010
011
100
101
110
111
Source of
VCRVOUT pin
(Hi-Z)
ENCV pin.
Encoder CVBS
or Y.
ENCY pin.
Encoder CVBS
or Y.
TVVIN pin.
TV CVBS.
VCRVIN pin.
VCR CVBS.
-
-
-
Table 14. VCR video output
Source of
VCRC pin
(Hi-Z)
ENCRC pin.
Encoder C.
ENCC pin.
Encoder C.
(Hi-Z) (default)
VCRRC pin.
VCR C.
-
-
-
(Note: 18)
MS0451-E-01
- 26 -
2007/06