參數(shù)資料
型號: AK4650VG
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
中文描述: 16位ツヒ編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 33/86頁
文件大?。?/td> 824K
代理商: AK4650VG
[AK4650]
MS0502-E-01
2007/04
- 33 -
Digital Attenuator
The AK4650 has a channel-independent digital attenuator (128 levels, 0.5dB step, Mute). The attenuation level of each
channel can be set by the ATTL/R6-0 bits (Table 25). When the DATTC bit = “1”, the ATTL6-0 bits control both Lch and
Rch attenuation levels. When the DATTC bit = “0”, the ATTL6-0 bits control Lch level and ATTR6-0 bits control Rch
level.
ATTL/R6-0
Attenuation
00H
0dB
01H
0.5dB
02H
1.0dB
:
:
7DH
62.5dB
7EH
63.0dB
7FH
MUTE (
)
Table 25. DATT Attenuation Table
The ATS bit sets the transition time between set values of ATTL/R6-0 bits as either 531/fs or 128/fs (Table 26). When
ATS bit = “0”, a soft transition between the set values occurs (531 levels). It takes 531/fs (11ms@fs=48kHz) from
00H(0dB) to 7FH(MUTE).
ATT speed
ATS
0dB to MUTE
0
531/fs
1
128/fs
Table 26. Transition time between set values of ATTL/R6-0 bits
STEP
(default)
0.5dB
-
1 step
4/fs
29/fs
(default)
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