AK4753 Datasheet, PDF (64/85 Pages) Asahi Kasei Microsystems – 2-in, 4-out CODEC with DSP Functions

[AK4753]
Addr
09H
Register Name
DSP1 Timer
Select
R/W
Default
D7
1RFST1
R/W
0
D6
1RFST0
R/W
0
D5
1WTM2
R/W
0
D4
D3
1WTM1 1WTM0
R/W
R/W
0
0
D2
1ZTM1
R/W
0
D1
1ZTM0
R/W
0
D0
DVTM
R/W
0
1RFST1-0: DSP1 First recovery Speed (Table 37)
Default: “00” (4times)
1WTM2-0: DSP1 Recovery Waiting Period (Table 34)
Default: “000” (128/fs)
1ZTM1-0: DSP1 Limiter/Recovery Operation Zero Crossing Timeout Period (Table 33)
Default: “00” (128/fs)
DVTM: Digital Volume Transition Time Setting
0: 1061/fs (default)
1: 256/fs
This is the transition time between L/R7-0 bits = 00H and FFH.
Addr
0AH
Register Name
DSP1 Reference
Level
R/W
Default
D7
1REF7
R/W
1
D6
1REF6
R/W
1
D5
1REF5
R/W
1
D4
1REF4
R/W
1
D3
1REF3
R/W
0
1REF7-0: DSP1 Reference Level at Recovery Operation (Table 36)
Default: “F1H” (0dB)
D2
1REF2
R/W
0
D1
1REF1
R/W
0
D0
1REF0
R/W
1
Addr
0BH
Register Name
DSP2 Limiter
Mode Control
R/W
Default
D7
2LFSTN
R/W
0
D6
D5
D4
D3
2ZELMN 2RGAIN1 2RGAIN0 2LMAT1
R/W
R/W
R/W
R/W
0
0
0
0
D2
2LMAT0
R/W
0
D1
2LMTH1
R/W
0
D0
2LMTH0
R/W
0
2LMTH1-0: DSP2 Limiter Detection Level / Recovery Counter Reset Level (Table 31)
Default: “00”
2LMAT1-0: DSP2 Limiter ATT Step (Table 32)
Default: “00”
2RGAIN1-0: DSP2 Recovery GAIN Step (Table 35)
Default: “00”
2ZELMN: DSP2 Zero Crossing Detection Enable at Limiter Operation
0: Enable (default)
1: Disable
2LFSTN: DSP2 Limiter functions when the output was bigger than full scale
0: When output is bigger than full scale, VOL value is changed instantly. (default)
1: The output is changed by the Limiter operation at the zero crossing point or at the zero crossing timeout.
MS1311-E-00
- 64 -
2011/07