AK4601VQ Datasheet, PDF (82/111 Pages) Asahi Kasei Microsystems – Audio HUB CODEC with Digital Mixer

[AK4601]
■ DAC Block (DAC1, DAC2 and DAC3)
1. DAC Digital Volume
The AK4601 has channel-independent digital volume controls in DAC block. (256 levels, 0.5 steps)
DAC1 Lch
DAC1 Rch
DAC2 Lch
VOLDA1L[7:0] VOLDA1R[7:0] VOLDA2L[7:0]
00h
00h
00h
01h
01h
01h
02h
02h
02h
:
:
:
17h
17h
17h
18h
18h
18h
19h
19h
19h
:
:
:
FDh
FDh
FDh
FEh
FEh
FEh
FFh
FFh
FFh
Table 53. DAC Digital Volume Setting
DAC2 Rch
VOLDA2R[7:0]
00h
01h
02h
:
17h
18h
19h
:
FDh
FEh
FFh
DAC3 Lch
VOLDA3L[7:0]
00h
01h
02h
:
17h
18h
19h
:
FDh
FEh
FFh
DAC3 Rch
VOLDA3R[7:0]
00h
01h
02h
:
17h
18h
19h
:
FDh
FEh
FFh
Attenuation
Level
+12.0dB
+11.5dB
+11.0dB
:
+0.5dB
0.0dB
-0.5dB
:
-114.5dB
-115.0dB
Mute (-∞)
(default)
Transition time between set values can be selected by ATSPDA bit.
MODE ATSPDA ATT speed
0
0
4/fs
(default)
1
1
16/fs
Table 54. DAC Volume Transition Time Setting
When changing output levels, transitions are executed via soft changes; thus no switching noise occurs
during these transitions. In Mode 0, it takes 1020/fs (21.3ms@fs=48kHz) from 00H(0dB) to FFH(MUTE).
If the PDN pin goes to “L”, each channel of the DAC is initialized to 18H.
ATSPDA
00h ↔ FFh Transition Time
LRCK Cycle fs=48kHz fs=44.1kHz fs=8kHz
0
1020/fs
21.3ms
23.1ms 127.5ms (default)
1
4080/fs
85.0ms
92.5ms 510.0ms
Table 55. DAC Volume Transition Time between 00h and FFh
016000391-E-01
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2016/12