參數(shù)資料
型號： AK4534
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： 16Bit CODEC with MIC/HP/SPK-AMP
中文描述： 16位編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù)： 26/64頁
文件大?。?/td> 443K
代理商： AK4534
ASAHI KASEI
[AK4534]
MS0133-E-03
2003/5
- 26 -
[3] Example of ALC1 Operation
Table 15 shows the examples of the ALC1 setting. In case of this examples, ALC1 operation starts from 0dB.
fs=8kHz
Data Operation Data Operation Data Operation
1
-4dBFS
1
-4dBFS
00
Don’t use
00
Don’t use
0
Enable
0
Enable
00
16ms
01
fs=16kHz
fs=44.1kHz
Register Name Comment
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
Gain of IPGA at ALC1 operation start
Limiter ATT Step
Recovery GAIN Step
ALC1 Enable bit
1
00
0
10
-4dBFS
Don’t use
Enable
11.6ms
16ms
WTM1-0
00
16ms
01
16ms
10
11.6ms
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
47H
10H
00
0
1
+27.5dB
0dB
1 step
1 step
Enable
Table 15. Example of the ALC1 setting
The following registers should not be changed during the ALC1 operation. These bits should be changed, after the ALC1
operation is finished by ALC1 bit = “0” or PMMIC bit = “0”.
LTM1-0, LMTH, LMAT1-0, WTM1-0, ZTM1-0, RATT, REF6-0, ZELM bits
IPGA gain at ALC1 operation start can be changed from the default value of IPGA6-0 bits while PMMIC bit is “1” and
ALC1 bit is “0”. When ALC1 bit is changed from “1” to “0”, IPGA holds the last gain value set by ALC1 operation.
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=08H, Data=00H
(2) Addr=0AH, Data=47H
(4) Addr=09H, Data=61H
(3) Addr=0BH, Data=10H
Figure 9. Registers set-up sequence at ALC1 operation
相關(guān)PDF資料
PDF描述
AK4534VN 16Bit CODEC with MIC/HP/SPK-AMP
AK4536 16-Bit Mono CODEC with ALC & MIC/SPK-AMP
AK4536VN 16-Bit Mono CODEC with ALC & MIC/SPK-AMP
AK4537 16-Bit ツヒ Stereo CODEC with MIC/HP/SPK-AMP
AK4537VN 16-Bit ツヒ Stereo CODEC with MIC/HP/SPK-AMP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4534VN 制造商:AKM 制造商全稱:AKM 功能描述:16Bit CODEC with MIC/HP/SPK-AMP
AK4534VQ 功能描述:IC CODEC 16BIT MIC/HP/SPK-AMP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時(shí)間 標(biāo)準(zhǔn)包裝:1,000
AK4536 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK-AMP
AK4536VN 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK-AMP
AK4537 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP
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