AK4665A Datasheet, PDF (29/52 Pages) Asahi Kasei Microsystems – 20-Bit Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
[AK4665A]
When
“ALC2 recovery waiting counter reset level ≤ ALC2 Output Signal Level < ALC2 limiter detection level”
during the ALC2 recovery operation, the waiting timer of ALC2 recovery operation is reset. When
“ALC2 recovery waiting counter reset level > ALC2 Output Signal Level”,
the waiting timer of ALC1 recovery operation starts.
FS3 FS2 FS1 FS0
0000
0001
0010
1000
1001
1010
1100
1101
1110
Others
ALC2 Recovery Time
WTMP=00
WTMP=01
WTMP=10
(Default)
768/fs (17.4ms) 1536/fs (34.8ms) 3072/fs (69.7ms)
512/fs (16.0ms) 1024/fs (32.0ms) 2048/fs (64.0ms)
768/fs (16.0ms) 1536/fs (32.0ms) 3072/fs (64.0ms)
384/fs (17.4ms) 768/fs (34.8ms) 1536/fs (69.7ms)
256/fs (16.0ms) 512/fs (32.0ms) 1024/fs (64.0ms)
384/fs (16.0ms) 768/fs (32.0ms) 1536/fs (64.0ms)
192/fs (17.4ms) 384/fs (34.8ms) 768/fs (69.7ms)
128/fs (16.0ms) 256/fs (32.0ms) 512/fs (64.0ms)
192/fs (16.0ms) 384/fs (32.0ms) 768/fs (64.0ms)
N/A
Table 26. ALC2 Recovery Operation Period
WTMP=11
24576/fs (557ms)
16384/fs (512ms)
24576/fs (512ms)
12288/fs (557ms)
8192/fs (512ms)
12288/fs (512ms)
6144/fs (557ms)
4096/fs (512ms)
6144/fs (512ms)
Default
RGAINP
GAIN STEP
0
1 step
0.5dB Default
1
2 step
1.0dB
Table 27. ALC2 Recovery Gain Step
REFP5-0
GAIN(dB)
Step
3FH
+19.5
3EH
+19.0
3DH
+18.5
3CH
+18.0
Default
:
:
19H
+0.5
0.5dB
18H
0.0
17H
−0.5
:
:
02H
−11.0
01H
−11.5
00H
−12.0
Table 28. Reference Level at ALC2 Recovery Operation
MS0440-E-01
- 29 -
2006/05