參數(shù)資料
型號(hào): AK4569VN
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 20-Bit Stereo CODEC with IPGA & HP-AMP
中文描述: 20位立體聲編解碼器與單親遺傳算法
文件頁(yè)數(shù): 32/45頁(yè)
文件大?。?/td> 474K
代理商: AK4569VN
ASAHI KASEI
[AK4569]
MS0292-E-01
2005/07
- 32 -
Addr Register Name
04H
ALC Mode Control 2
Default
D7
0
0
D6
REF6
0
D5
REF5
1
D4
REF4
1
D3
REF3
1
D2
REF2
1
D1
REF1
1
D0
REF0
1
REF6-0: Reference Value at ALC Recovery Operation, 0.5dB step, 103 levels, Default: “3FH” (Table 12)
During the ALC recovery operation, if the IPGA value exceeds the set reference value by gain operation,
IPGA does not become larger than the reference value. For example, when REF= “40H”, RATT= “1” (2
step) and IPGA= “3FH”, then IPGA is going to become 3FH + 2step = 41H, but IPGA becomes 40H in
fact, since REF=40H.
GAIN
DATA
AINL1, AINR1
(LINE IN)
+20.0dB
+19.5dB
+19.0dB
:
0dB
:
12.0dB
:
30.5dB
31.0dB
MUTE (
)
AINL2, AINR2
(MIC IN)
+32.0dB
+31.5dB
+31.0dB
:
+12.0dB
:
0dB
:
18.5dB
19.0dB
MUTE (
)
67H
66H
65H
:
3FH
:
27H
:
02H
01H
00H
Default
Table 12. Reference Value Setting at ALC Recovery Operation
Addr Register Name
05H
IPGA Control
D7
0
0
D6
D5
D4
D3
D2
D1
D0
IPGA6
0
IPGA5
1
IPGA4
1
IPGA3
1
IPGA2
1
IPGA1
1
IPGA0
1
Default
IPGA6-0: Input Analog PGA, 0.5dB step, 103 levels, Default: “3FH” (Table 13)
When IPGA gain is changed, IPGA6-0 bits should be written while PMADC bit is “1” and ALC bit is “0”.
IPGA gain is reset when PMADC bit is “0”, and then IPGA operation starts from the default value when
PMADC is changed to “1”. When ALC bit is changed from “1” to “0”, IPGA holds the last gain value set
by ALC operation.
GAIN
DATA
AINL1, AINR1
(LINE IN)
+20.0dB
+19.5dB
+19.0dB
:
0dB
:
12.0dB
:
30.5dB
31.0dB
MUTE (
)
Table 13. Input Gain Setting
AINL2, AINR2
(MIC IN)
+32.0dB
+31.5dB
+31.0dB
:
+12.0dB
:
0dB
:
18.5dB
19.0dB
MUTE (
)
67H
66H
65H
:
3FH
:
27H
:
02H
01H
00H
Default
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