AK4220 Datasheet, PDF (18/33 Pages) Asahi Kasei Microsystems – 7:3 Audio Switch and 6:3 Video Switch

I
[AK4220]
LV2 bit
0
0
0
0
1
1
1
1
LV1 bit
LV0 bit
Input Reception
0
0
-6dB
0
1
-3dB
1
0
0dB
1
1
+3dB
0
0
+6dB
0
1
N/A
1
0
N/A
1
1
N/A
0dB = +40mV₀p(typ)
Table 9. Level Setting of Audio Input Detection
(default)
ACT1 bit
0
0
1
1
ACT0 bit
0
1
0
1
Consecutive Detect Frequency
1
2
4
8
(default)
Table 10. Consecutive Detection frequency Setting of Audio Input Detection
RTM1 bit
0
0
1
1
RTM0 bit
0
1
0
1
Recovery Time
(typ)
40ms
80ms
160ms
320ms
(default)
Table 11. Recovery Time Setting of Audio Input Detection
Detect Level
-31dBV(default)
Input pin
(ex. LIN+1)
Input signal level exceeds the detection reception value during
sampling x consecutive detect frequency.
Input signal level doesn’t exceeds the detection reception value
during sampling x consecutive detect frequency.
Recovery Time
ADETL bit
“0”
“1”
“0”
INT pin
Hi-Z (pulled-up)
“L”
Figure 14. Audio Detection Operation
Hi-Z (pulled-up)
MS0627-E-00
- 18 -
2007/05