AK4707 Datasheet, PDF (25/42 Pages) Asahi Kasei Microsystems – AV SCART Switch

ASAHI KASEI
[AK4707]
„ INT Function and Mask Options (09H: D3-D1)
Changes of the 08H status can be monitored via the INT pin. The INT pin is the open drain output and goes “L” for 2µs
(typ.) when the status of 08H is changed. This pin should be connected to VD (typ. 5V) through 10kohm resistor.
MTV bit, MVC bit, MCOMN bit, MFVCR bit and MSVCR bit control the reflection of the status change of these
monitors onto the INT pin from report to prevent to masks each monitor.
AK4707
INT
VD
R=10kΩ
uP
MVC: VCMON Mask. Refer Table 18
MTV: TVMON Mask. Refer Table 17
MCOMN: Refer Table 16
Figure 6. INT pin
AUTO
(00H D3)
TVMON
(08H D4)
MTV
(09H D4)
INT
0
No Change
0
Hi-Z
0
No Change
1
0
Change
0
Hi-Z
Generates “L” Pulse
0
Change
1
Hi-Z
1
No Change
0
Hi-Z
1
No Change
1
Hi-Z
Note 20. When the STBY bit = “0”, the TV Monitor Mask function is enabled.
Note 21. When AUTO bit = “1”, TVMON does not change.
Table 17. TV Monitor Mask
AUTO
(00H D3)
VCMON
(08H D3)
MVC
(09H D3)
INT
0
No Change
0
Hi-Z
0
No Change
1
0
Change
0
0
Change
1
Hi-Z
Generates “L” Pulse
Hi-Z
1
No Change
0
Hi-Z
1
No Change
1
1
Change
0
1
Change
1
Hi-Z
Generates “L” Pulse
Generates “L” Pulse
Note 22. When the STBY bit = “0”, the VCR Monitor Mask function is enabled.
Table 18. VCR Monitor Mask
MFVCR: FVCR Monitor mask.
0: Change of FVCR is reflected to INT pin. (default)
1: Change of FVCR is NOT reflected to INT pin.
MSVCR: SVCR1-0 Monitor mask
0: Change of SVCR1-0 is reflected to INT pin. (default)
1: Change of SVCR1-0 is NOT reflected to INT pin.
MS0551-E-00
- 25 -
2006/10