ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 71

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MS0477-E-01
Addr
Addr
Addr
08H
06H
07H
RFST1-0: ALC First recovery Speed (See Table 34)
WTM2-0: ALC Recovery Waiting Period (See Table 31.)
ZTM1-0: ALC Limiter/Recovery Operation Zero Crossing Timeout Period (See Table 30.)
DVTM: Digital Volume Transition Time Setting (See Table 40.)
LMTH1-0: ALC Limiter Detection Level / Recovery Counter Reset Level (See Table 28.)
RGAIN1-0: ALC Recovery GAIN Step (See Table 32.)
LMAT1-0: ALC Limiter ATT Step (See Table 29.)
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 33.)
Default: “000” (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
Default: “00”(4times)
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 0BH.
Default
Default
Default
DVTM
REF7
D7
D7
D7
0
0
0
1
WTM2
REF6
D6
D6
D6
1
0
0
0
- 71 -
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
RFST1
REF1
D1
D1
D1
0
0
0
[AK4644]
LMTH0
RFST0
2006/10
REF0
D0
D0
D0
0
0
1