AK4705 Datasheet, PDF (33/50 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV SCART Switch

[AK4705]
■ INT Function and Mask Options (09H: D7, D4-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
2μsec(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.
AK4705
INT
VD
R=10kΩ
uP
MVC: VCMON Mask. Refer Table 30
MTV: TVMON Mask. Refer Table 29
MCOMN: Refer Table 28
Figure 9. INT pin
AUTO
(00H D3)
0
0
0
0
1
1
TVMON
(08H D4)
MTV
(09H D4)
No Change
0
No Change
1
Change
0
Change
1
No Change
0
No Change
1
Table 29. TV Monitor Mask
AUTO
(00H D3)
0
0
0
0
1
1
1
1
VCMON
(08H D3)
MVC
(09H D3)
No Change
0
No Change
1
Change
0
Change
1
No Change
0
No Change
1
Change
0
Change
1
Table 30. VCR Monitor Mask
MFVCR: FVCR Monitor mask.
0: Change of MFVCR is reflected to INT pin. (default)
1: Change of MFVCR 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.
INT
Hi-Z
Hi-Z
Generates “L” Pulse
Hi-Z
Hi-Z
Hi-Z
INT
Hi-Z
Hi-Z
Generates “L” Pulse
Hi-Z
Hi-Z
Hi-Z
Generates “L” Pulse
Generates “L” Pulse
MS0451-E-01
- 33 -
2007/06