ASAHI KASEI
[AK4370]
■ Headphone Output Volume
HPL/HPR volume is controlled by ATTH4-0 bit when HMUTE bit = “0” (+12dB ∼ −51dB or +6dB ∼ −57dB or 0dB ∼
−63dB, 1.5dB or 3dB step, Table 15)
HPG1-0 bits = “10”
HPG1-0 bits = “01”
HMUTE
ATTH4-0
HPG1-0 bits = “00”
STEP
(DAC Only)
+12dB
+10.5dB
+9dB
+7.5dB
:
(DAC Only)
+6dB
+4.5dB
+3dB
+1.5dB
:
00H
01H
02H
03H
:
0dB
−1.5dB
−3dB
−4.5dB
:
Default
1.5dB
:
:
:
:
12H
13H
14H
15H
16H
:
−15dB
−16.5dB
−18dB
−21dB
−24dB
:
−21dB
−22.5dB
−24dB
−27dB
−30dB
:
−27dB
−28.5dB
−30dB
−33dB
−36dB
:
0
:
:
:
:
3dB
1DH
1EH
1FH
x
−45dB
−48dB
−51dB
MUTE
−51dB
−54dB
−57dB
MUTE
−57dB
−60dB
−63dB
MUTE
1
Table 15. HPL/HPR Volume ATT values (x: Don’t care)
MS0595-E-00
2007/03
- 27 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
