ak4564 AKM Semiconductor, Inc., ak4564 Datasheet - Page 43

• Manufacturer Part Number: ak4564
• Description: 16bit Codec With Built-in Alc And Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Input Digital ATT Control
MS0140-E-01
Addr
0AH
IVOL7-0: Input Digital Volume; 0.375dB step, 242 Level
Input Digital Volume Control
Default
Register Name
When the ALC1 operation is OFF, IVOL can be used as volume. When the IVOL is changed, the IVOL
is detected by zero crossing. Zero crossing timeout period is set by ZTM1-0 and FSTM bits.
The change of gain table between MIC and LINE is set by GSEL bit.
During the ALC1 operation, the writing value in IVOL7-0 bits is ignored
Table 23. Attenuation value of Input Digital Volume
IVOL7
DATA
DFH
EFH
E2H
E1H
E0H
D7
F1H
F0H
04H
03H
02H
01H
00H
1
IVOL6
(GSEL bit = “0”)
D6
1
+35.625
+30.375
+29.625
-52.875
-53.625
+35.25
+29.25
MUTE
-53.25
+36.0
+30.0
MIC
-54
- 43 -
IVOL5
D5
GAIN(dB)
1
(GSEL bit = “1”)
IVOL4
D4
-82.875
-83.625
+5.625
+0.375
MUTE
-0.375
-83.25
0
LINE
+5.25
-0.75
+6.0
-84
0
IVOL3
D3
0
Default
IVOL2
D2
0
IVOL1
D1
0
[AK4564]
IVOL0
2002/07
D0
1