參數(shù)資料
型號(hào): AK4640
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi): Codec
英文描述: 16BIT CODEC WITH MIC /HP/SPK-AMPl
中文描述: 16位編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植,AMPl
文件頁(yè)數(shù): 57/76頁(yè)
文件大小: 634K
代理商: AK4640
ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
- 57 -
ALC1: ALC1 Enable
0: ALC1 Disable (Default)
1: ALC1 Enable
ALC2: ALC2 Enable
0: ALC2 Disable
1: ALC2 Enable (Default)
Addr
Register Name
0AH
ALC Mode Control 2
R/W
Default
REF6-0: Reference value at ALC1 Recovery Operation (see Table 31)
During the ALC1 recovery operation, if the IPGA value exceeds the setting reference value by gain operation,
then the IPGA does not become larger than the reference value. For example, when REF7-0 = “30H”, RATT
= 2step, IPGA = 2FH, even if the input signal does not exceed the “ALC1 Recovery Waiting Counter Reset
Level”, the IPGA does not change to 2FH + 2step = 31H, and keeps 30H. Default is “36H”.
DATA (HEX)
GAIN (dB)
47
+27.5
46
+27.0
45
+26.5
:
:
36
+19.0
:
:
10
+0.0
:
:
06
5.0
05
5.5
04
6.0
03
6.5
02
7.0
01
7.5
00
8.0
Table 31. Setting Reference Value at ALC1 Recovery Operation
D7
0
RD
0
D6
REF6
R/W
0
D5
REF5
R/W
1
D4
REF4
R/W
1
D3
REF3
R/W
0
D2
REF2
R/W
1
D1
REF1
R/W
1
D0
REF0
R/W
0
STEP
Default
0.5dB
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