AK4647VN AKM [Asahi Kasei Microsystems], AK4647VN Datasheet - Page 54
AK4647VN
Manufacturer Part Number
AK4647VN
Description
Stereo CODEC with MIC/HP-AMP
Manufacturer
AKM [Asahi Kasei Microsystems]
Datasheet
1.AK4647VN.pdf
(72 pages)
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ASAHI KASEI
MS0566-E-00
Addr
Addr
Addr
08H
06H
07H
WTM1-0: ALC Recovery Waiting Period (see Table 26.)
ZTM1-0: ALC Limiter/Recovery Operation Zero Crossing Timeout Period (see Table 25.)
DVTM: Digital Volume Transition Time Setting (see Table 34.)
LMTH1-0: ALC Limiter Detection Level / Recovery Counter Reset Level (see Table 23.)
RGAIN1-0: ALC Recovery GAIN Step (see Table 27.)
LMAT1-0: ALC Limiter ATT Step (see Table 24.)
ZELMN: Zero Crossing Detection Enable at ALC Limiter Operation
ALC: ALC Enable
REF7-0: Reference Value at ALC Recovery Operation. 0.375dB step, 242 Level (see Table 28.)
Default: “00” (128/fs)
Default: “00” (128/fs)
0: 1061/fs (Default)
1: 256/fs
Default: “00”
Default: “00”
Default: “00”
0: Enable (Default)
1: Disable
0: ALC Disable (Default)
1: ALC Enable
Default: “E1H” (+30.0dB)
Register Name
ALC Mode Control 2
Register Name
Timer Select
Register Name
ALC Mode Control 1
This is the transition time between DVL/R7-0 bits = 00H and FFH.
LMTH1 bit is D6 bit of 0BH.
RGAIN1 bit is D7 bit of 03H.
Default
Default
Default
DVTM
REF7
D7
D7
D7
0
0
0
1
REF6
D6
D6
D6
1
0
0
0
0
- 54 -
REF5
ZTM1
D5
ALC
1
D5
D5
0
0
ZELMN
REF4
ZTM0
D4
D4
D4
0
0
0
LMAT1
WTM1
REF3
D3
D3
D3
0
0
0
LMAT0
WTM0
REF2
D2
D2
D2
0
0
0
RGAIN0
REF1
D1
D1
D1
0
0
0
0
[AK4647]
LMTH0
2006/11
REF0
D0
D0
D0
0
0
0
1
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