AK4706 Datasheet, PDF (30/53 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV Switch & HD/SD Video Filter

ASAHI KASEI
[AK4706]
(04H: D7-D6)
Mode
VRF1-0
bit
Source of
RFV pin
Encoder CVBS1
Encoder CVBS2
VCR (default)
00
ENCV pin.
(Encoder CVBS)
ENCG pin.
01
(Encoder CVBS)
(Note 24)
10
VCRVIN pin.
(VCR CVBS)
Shutdown
11
(Hi-Z)
Table 16. RF video output
Note 23. When input the video signal via ENCRC pin or VCRRC pin, set CLAMP1-0 bits respectively.
Note 24. When VTV2-0 bit =“001”, TVG bit =“1” and VRF1-0 bit =“01”, RFV pin output is same
as TVG pin output (Encoder G).
„ Video Output Control (05H: D6-D0)
Each video outputs can be set to Hi-Z individually via control registers. These setting are ignored when the AUTO bit =
“1”. When the CIO bit = “1”, the VCRC pin outputs 0V even if the VCRC bit = “0”. When the CIO bit = “0”, the VCRC
pin follows the setting of VCRC bit. Please refer the “Red/Chroma Bi-directional Control for VCR SCART”.
TVV: TVVOUT output control
TVR: TVRCOUT output control
TVG: TVGOUT output control
TVB: TVBOUT output control
VCRV: VCRVOUT output control
VCRC: VCRC output control
TVFB: TVFB output control
0: Hi-Z (default)
1: Active.
„ Red/Chroma Bi-directional Control for VCR SCART (05H: D7, D5)
The AK4706 supports the bi-directional Red/Chroma signal on the VCR SCART.
(CIO bit &
VCRC bit)
#15 pin
75
VCRC
pin
MS0507-E-00
VCRRC
pin
0.1u
VCR SCART
(AK4706)
Figure 8. Red/Chroma Bi-directional Control
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2006/05