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參數(shù)資料
| 型號： | AK4569 |
| 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 |
| 文件頁數(shù)： | 31/45頁 |
| 文件大?。?/td> | 474K |
| 代理商： | AK4569 |
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ASAHI KASEI
[AK4569]
MS0292-E-01
2005/07
- 31 -
Addr Register Name
03H
ALC Mode Control 1
Default
D7
0
0
D6
0
0
D5
ALC
0
D4
D3
D2
D1
RATT
0
D0
ZELMN
0
LMAT1
0
LMAT0
0
LMTH
0
LMTH: ALC Limiter Detection Level / Recovery Waiting Counter Reset Level (Table 9)
LMTH
0
1
ALC Limiter Detection Level
ADC Input
≥
6.0dBFS
ADC Input
≥
4.0dBFS
Table 9. ALC1 Limiter Detection Level / Recovery Waiting Counter Reset Level
ALC Recovery Waiting Counter Reset Level
6.0dBFS
>
ADC Input
≥
8.0dBFS
4.0dBFS
>
ADC Input
≥
6.0dBFS
Default
RATT: ALC Recovery GAIN Step (Table 10)
During the ALC recovery operation, the number of steps changed from the current IPGA value is set. For
example, when the current IPGA value is 3FH, RATT = “1” is set, the IPGA changes to 41H due to the
ALC recovery operation, the output signal level is gained by 1dB (=0.5dB x 2). When the IPGA value
exceeds the reference level (REF6-0 bits), the IPGA value does not increase.
RATT
0
1
Table 10. ALC Recovery Gain Step Setting
GAIN STEP
1
2
Default
LMAT1-0: ALC Limiter ATT Step (Table 11)
During the ALC limiter operation, when either Lch or Rch exceeds the ALC limiter detection level set by
LMTH bit, LMAT1-0 bits set the number of steps attenuated from the current IPGA value. For example,
when the current IPGA value is 3FH when LMAT1-0 bit = “11”, the IPGA value changes to 3BH by the
ALC limiter operation, the input signal level is attenuated by 2dB (=0.5dB x 4). When the attenuation value
exceeds IPGA = “00H” (Mute), it clips to “00H”.
LMAT1
0
0
1
1
LMAT0
0
1
0
1
ATT STEP
1
2
3
4
Default
Table 11. ALC Limiter ATT Step Setting
ZELMN: Zero Crossing Detection Enable at ALC Limiter Operation
0: Enable (Default)
1: Disable
In case of ZELMN = “0”, when IPGA output detects zero crossing or timeout, the IPGA value is changed
by the ALC operation. Zero crossing timeout is the same as ALC recovery operation. In case of ZELMN =
“1”, the IPGA value is changed immediately.
ALC: ALC Enable Flag
0: ALC Disable (Default)
1: ALC Enable
ALC is enabled at ALC bit is “1”. Default: “0” (Disable).
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| AK4571VQP | 功能描述:IC AUDIO CODEC W/USB 16B 48LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:PCM 數(shù)據(jù)接口:PCM 音頻接口 分辨率（位）:15 b ADC / DAC 數(shù)量:1 / 1 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):- 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):- 電壓 - 電源，模擬:2.7 V ~ 3.3 V 電壓 - 電源，數(shù)字:2.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-VFBGA 供應(yīng)商設(shè)備封裝:80-BGA MICROSTAR JUNIOR（5x5） 包裝:帶卷 (TR) 其它名稱:296-21257-2 |
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