ak4529 AKM Semiconductor, Inc., ak4529 Datasheet - Page 21

• Manufacturer Part Number: ak4529
• Description: High Performance Multi-channel Audio Codec
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n Digital Attenuator
AK4529 has channel-independent digital attenuator (256 levels, 0.5dB step). Attenuation level of each channel can be set
by each ATT7-0 bits (table 11).
Transition time between set values of ATT7-0 bits can be selected by ATS1-0 bits (table 12).
The transition between set values is soft transition of 7425 levels in mode 0. It takes 7424/fs (168ms@fs=44.1kHz) from
00H(0dB) to FFH(MUTE) in mode 0. If PDN pin goes to “L”, the ATTs are initialized to 00H. The ATTs are 00H when
RSTN = “0”. When RSTN return to “1”, the ATTs fade to their current value. Digital attenuator is independent of soft
mute function.
MS0082-E-00
Mode
Table 12. Transition time between set values of ATT7-0 bits
0
1
2
Table 11. Attenuation level of digital attenuator
ATT7-0
FDH
FEH
FFH
00H
01H
02H
:
ATS1
0
0
1
Attenuation Level
MUTE (- )
ATS0
-126.5dB
-127.0dB
- 21 -
0
1
0
-0.5dB
-1.0dB
:
0dB
ATT speed
7424/fs
1024/fs
256/fs
Default
Default
[AK4529]
2001/3