AK4709 Datasheet, PDF (26/42 Pages) Asahi Kasei Microsystems – Low Power AV SCART Switch

[AK4709]
■ INT Function and Mask Options (09H: D3-D1)
Changes of the 08H status can be monitored via the INT pin. The INT pin is an open drain output and goes “L” for 2μs
(typ.) when the status of 08H is changed. This pin should be tied to VVD1 (typ. 3.3V) via 10kΩ resistor or lower voltage
through 10kΩ 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.
AK4709
INT
3.3 V
R=10kΩ
uP
MVC: VCMON Mask. Refer Table 25.
MTV: TVMON Mask. Refer Table 24.
MCOMN: Refer Table 23
Figure 10. 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 29. When the STBY bit = “0”, the TV Monitor Mask function is enabled.
Note 30. When AUTO bit = “1”, TVMON does not change
Table 24. TV Monitor Mask
AUTO
(00H D3)
VCMON
(08H D3)
MVC
(09H D3)
INT
0
No Change
0
0
No Change
1
0
Change
0
0
Change
1
Hi-Z
Hi-Z
Generates “L” Pulse
Hi-Z
1
No Change
0
1
No Change
1
1
Change
0
1
Change
1
Hi-Z
Hi-Z
Generates “L” Pulse
Generates “L” Pulse
Note 31. When the STBY bit = “0”, the VCR Monitor Mask function is enabled.
Table 25. 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.
MS1319-E-00
- 26 -
2011/07