AK4561 Datasheet, PDF (27/48 Pages) Asahi Kasei Microsystems – 16bit CODEC with built-in ALC and MIC/HP-Amp

ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
Output PGA Control
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
09H Output PGA Control
0
0
0 OPGA4 OPGA3 OPGA2 OPGA1 OPGA0
RESET
0
0
0
1
1
1
1
1
OPGA4-0: Output analog PGA; 32 Level; 0dB ∼ -50dB, Mute.
These bits can change volume of Headphone-Amp and Monaural-Amp.
This volume includes zero crossing detection, and it does L/R channels independently. Zero
crossing timeout is 32ms.
These periods are value at fs=32kHz (FS bit = “0”) or fs=48kHz (FS bit = “1”).
RESET
DATA GAIN(dB) STEP LEVEL
1FH
+0
1EH
-1
1DH
-2
1dB
17
•
•
10H
-15
0FH
-16
0EH
-18
0DH
-20
•
•
2dB
11
05H
-36
04H
-38
03H
-42
02H
-46
4dB
3
01H
-50
00H
Mute
1
Table 16. ATT value of Analog Volume
Rev. 0.9
- 27 -
2000/09