AK4706 Datasheet, PDF (33/53 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV Switch & HD/SD Video Filter

ASAHI KASEI
[AK4706]
4. Blanking Control, S1/S2 DC Control
When the SDC bit= “0”, the AK4706 supports Fast Blanking signals and Slow Blanking (Function Switching) signals for
TV/VCR SCART. When the SDC bit= “1”, the AK4706 supports S1/S2 mode.
SDC bit: SCART-S1/S2 Control
0: SCART Fast/Slow Blanking Mode
1: S1/S2 Mode
„ Input/Output Control for Fast/Slow Blanking
FB1-0: TV Fast Blanking output control (0AH: D4, 07H: D1-D0)
Input
SDC bit FB1 bit FB0 bit
Output
TVFB pin Output Level
0
0
0
0
0
1
0
1
0
0
1
1
<0.4V (default)
4V<
Same as VCR FB input (4V/0V)
(Reserved)
1
0
0
<0.4V
1
0
1
1.55V to 2.4V
1
1
0
Same as VCR FB input (5V/2.2V/0V)
1
1
1
3.5V<
(Note: Load resistance is min.150ohm for SDC bit =”0”, min.100kohm for SDC bit =”1”)
Table 25. TV Fast Blanking output
SBT1-0: TV Slow Blanking output control (0AH: D4, 07H: D3-D2)
Input
Output
SDC bit
SBT1
bit
SBT0
bit
TVSB pin Output Level
0
0
0
<2V (default)
0
0
1
0
1
0
5V to 7V
(Reserved)
0
1
1
10V<
1
0
0
<0.4V
1
0
1
1
1
0
1
1
1
1.55V to 2.4V
(Reserved)
3.5V<
(Note: Load resistance is min.10kohm for SDC bit =”0”, min.100kohm for SDC bit =”1”)
Table 26. TV Slow Blanking output
SBV1-0: VCR Slow Blanking output control (07H: D5-D4)
SBV1 SBV0
VCRSB pin Output Level
0
0
<2V (default)
0
1
1
0
5V to 7V
(Reserved)
1
1
10V<
(Note: Load resistance is min.10kohm)
Table 27. VCR Slow Blanking output
MS0507-E-00
- 33 -
2006/05