AK4636 Datasheet, PDF (49/105 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP

[AK4636]
■ Output Digital Volume3
The AK4636 has a digital output volume (DVOL) with 256 levels in linear steps (Table 24). The volume can be set by the
DVL7-0 and DVR7-0 bits. The volume is included in front of a DAC block. The input data of DAC is changed from
+0.35 to –47.78dB or MUTE. The volume calculating formula is shown in Table 26.
DVOL7-0 bits ATT_DATA GAIN(0dB)
FFH
255
+0.35
FEH
254
+0.31
:
:
:
F5H
245
0
(default)
:
:
:
02H
2
-41.76
01H
1
-47.78
00H
-
Mute
Table 25. Output Digital Volume3 Setting
DVOL7-0 bits
GAIN (dB)
FFH
:
0.35 + 20 log₁₀ (ATT_DATA / 255)
01H
00H
Mute
Table 26. Output Digital Volume3 Formula
MS1012-E-01
- 49 -
2010/08