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參數(shù)資料
| 型號(hào)： | AK4631 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類(lèi)： | Codec |
| 英文描述： | 16-Bit Mono CODEC with ALC & MIC/SPK-AMP |
| 中文描述： | 16位單聲道編解碼器ALC的 |
| 文件頁(yè)數(shù)： | 34/69頁(yè) |
| 文件大?。?/td> | 568K |
| 代理商： | AK4631 |
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ASAHI KASEI
[AK4631]
MS0317-J-01
2004/11
- 34 -
[3] ALC1
Table 15
ALC1
ALC1
0dB
fs=8kHz
fs=16kHz
Data
1
00
0
01
Register Name Comment
Data
1
00
0
00
Operation
-4dBFS
Don’t use
Enable
16ms
Operation
-4dBFS
Don’t use
Enable
16ms
LMTH
LTM1-0
ZELM
ZTM1-0
Limiter detection Level
Limiter operation period at ZELM = 1
Limiter zero crossing detection
Zero crossing timeout period
Recovery waiting period
*WTM1-0 bits should be the same data
as ZTM1-0 bits
Maximum gain at recovery operation
IPGA gain at the start of ALC1 operation
Limiter ATT Step
Recovery GAIN Step
ALC1 Enable bit
WTM1-0
00
16ms
01
16ms
REF6-0
IPGA6-0
LMAT1-0
RATT
ALC1
47H
10H
00
0
1
+27.5dB
0dB
1 step
1 step
Enable
47H
10H
00
0
1
+27.5dB
0dB
1 step
1 step
Enable
Table 15. Examples of the ALC1 setting
ALC1
ALC1 bit = “0” or PMMIC bit = “0”
LTM1-0, LMTH, LMAT1-0, WTM1-0, ZTM1-0, RATT, REF6-0, ZELM
ALC1
PMMIC bit = “0”
= “1”
“0”
IPGA
ALC1
PMMIC bit = “1”
IPGA6-0 bits
ALC1
ALC1 bit = “0”
IPGA
IPGA6-0 bit
ALC1 bit
Manual Mode
* The value of IPGA should be
the same or smaller than REF’s
WR (ZTM1-0, WTM1-0, LTM1-0)
WR (REF6-0)
WR (IPGA6-0)
ALC1 Operation
Note : WR : Write
WR (ALC1= “1”, LMAT1-0, RATT, LMTH, ZELM)
Example:
Limiter = Zero crossing Enable
Recovery Cycle = 16ms @ fs= 8kHz
Limiter and Recovery Step = 1
Maximum Gain = +27.5dB
Limiter Detection Level = -4dBFS
ALC2 bit = “1” (default)
(1) Addr=06H, Data=00H
(2) Addr=08H, Data=47H
(4) Addr=07H, Data=61H
(3) Addr=09H, Data=10H
Figure 30. Registers set-up sequence at ALC1 operation
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| AK4631_1 | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ツヒ Mono CODEC with ALC & MIC/SPK-AMP |
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| AK4632 | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ツヒ Mono CODEC with ALC & MIC/SPK/Video-AMP |
| AK4632VN | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ツヒ Mono CODEC with ALC & MIC/SPK/Video-AMP |
| AK4633 | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK-AMP |
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