AK4707 Datasheet, PDF (23/42 Pages) Asahi Kasei Microsystems – AV SCART Switch

ASAHI KASEI
[AK4707]
4. Blanking Control
The AK4707 supports Fast Blanking signals and Slow Blanking (Function Switching) signals for TV/VCR SCART.
„ Input/Output Control for Fast/Slow Blanking
FB1-0: TV Fast Blanking output control (07H: D1-D0)
FB1 bit FB0 bit
TVFB pin Output Level
0
0
0V (default)
0
1
2V<, 4V(typ) at 150Ω load
1
0
Same as VCR FB input (4V/0V)
1
1
(Reserved)
Table 10. TV Fast Blanking output (Note: minimum load is 150Ω)
SBT1-0: TV Slow Blanking output control (07H: D3-D2)
SBT1 bit SBT0 bit TVSB pin Output Level
0
0
< 2V (default)
0
1
5V <, < 7V
1
0
(Reserved)
1
1
10V <
Table 11. TV Slow Blanking output (Note: minimum load is 10kΩ)
SBV1-0: VCR Slow Blanking output control (07H: D5-D4)
SBV1 bit SBV0 bit VCRSB pin Output Level
0
0
< 2V (default)
0
1
5V <, < 7V
1
0
(Reserved)
1
1
10V <
Table 12. VCR Slow Blanking output (Note: minimum load is 10kΩ)
SBIO1-0: TV/VCR Slow Blanking I/O control (07H: D7-D6)
SBIO1 bit
0
0
1
1
SBIO0 bit
0
1
0
1
VCRSB pin Direction
TVSB pin Direction
Output
Output
(Controlled by SBV1-0 bits) (Controlled by SBT1-0 bits)
(Reserved)
(Reserved)
Input
Output
(Stored in SVCR1-0 bits) (Controlled by SBT1-0 bits)
Input
(Stored in SVCR1-0 bits)
Output
(Same output as VCR SB)
Table 13. TV/VCR Slow Blanking I/O control
(default)
MS0551-E-00
- 23 -
2006/10