[AK4372]
■ Headphone Output Volume
HPL/HPR volume is controlled by ATTH4-0 bits when HMUTE bit = “0” (+12dB ∼ −51dB or +6dB ∼ −57dB or 0dB ∼
−63dB, 1.5dB or 3dB step, Table 25)
HPG1-0 bits = “10”
(DAC Only)
+12dB
+10.5dB
+9dB
HPG1-0 bits = “01”
(DAC Only)
+6dB
HMUTE
ATTH4-0
HPG1-0 bits = “00”
STEP
00H
01H
02H
03H
:
0dB
−1.5dB
−3dB
−4.5dB
:
(default)
+4.5dB
+3dB
+1.5dB
:
+7.5dB
:
1.5dB
12H
13H
14H
15H
16H
:
1DH
1EH
1FH
x
−15dB
−16.5dB
−18dB
−21dB
−24dB
:
−45dB
−48dB
−51dB
MUTE
−21dB
−22.5dB
−24dB
−27dB
−30dB
:
−51dB
−54dB
−57dB
MUTE
−27dB
−28.5dB
−30dB
−33dB
−36dB
:
−57dB
−60dB
−63dB
MUTE
0
1
3dB
Table 25. HPL/HPR Volume ATT values (x: Don’t care)
MS0684-E-02
2008/12
- 32 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
