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參數(shù)資料
| 型號： | AK4586 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | MULTI CHANNEL AUDIO CODEC WITH DIR |
| 中文描述： | 多通道音頻編解碼器迪爾 |
| 文件頁數(shù)： | 21/54頁 |
| 文件大小： | 586K |
| 代理商： | AK4586 |
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ASAHI KASEI
[AK4586]
MS0097-E-01
2001/12
- 21 -
De-emphasis Filter Control
The AK4586 includes the digital de-emphasis filter (tc=50/15μs) by IIR filter corresponding to three sampling
frequencies (32kHz, 44.1kHz and 48kHz). When DEAU bit = “1”, the de-emphasis filter is enabled automatically by
sampling frequency and pre-emphasis information in the channel status. The AK4586 goes to this mode at default and the
de-emphasis filter is controlled by the status bits in channel 1 (Table 8). DEM1-0 and DFS bits can control the
de-emphasis filter when DEAU is “0” (Table 9). The internal de-empahsis filter is bypassed and the recovered data is
output without any change if either pre-emphasis or de-emphasis mode is OFF. The internal de-emphasis filter is
bypassed if the Non-PCM or the DTS-CD bitstream is detected at DEAU= “1”. The internal de-emphasis filter is
bypassed if bit 0 of the channel status byte 0 is “1”.
RFS96
FS1
FS0
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
Table 8. De-emphasis Auto Control at DEAU=“1” and PEM=“1”
Sampling Speed
DEM1
Normal Speed
0
Normal Speed
0
Normal Speed
1
Normal Speed
1
Double Speed
0
Double Speed
0
Double Speed
1
Double Speed
1
Table 9. De-emphasis Manual Control at DEAU=“0” and PEM=“1”
System Reset and Power-Down
The AK4586 has a power-down mode for all circuits by PDN pin or can be partially powered-down by internal register.
The AK4586 should be reset once by bringing PDN pin = “L” upon power-up. ADC, DAC and PLL are powered-down at
PWVRN= “0”.
PDN
PWADN
PWDAN
PWVRN
RSTN CM1-0
L
x
x
x
x
x
0
x
x
x
x
x
0
x
x
x
x
x
0
x
x
x
x
x
0
x
x
x
x
x
x
x
x
x
x
Table 10. Reset & Power Down
DEM
44.1kHz
OFF
48kHz
32kHz
OFF
OFF
OFF
OFF
0
1
0
1
0
1
0
1
Default
DEM0
0
1
0
1
0
1
0
1
DEM
44.1kHz
OFF
48kHz
32kHz
OFF
OFF
OFF
OFF
Default
Function
Register initialization
Yes
No
No
No
No
No
No
x
x
x
x
x
00
01
All power down
ADC power down
DAC power down
VREF power down
Timing Reset
X’tal power down
PLL power down
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4586VQ | Circular Connector; MIL SPEC:MIL-C-5015 A/B/C; Body Material:Aluminum Alloy; Series:97-3100A; No. of Contacts:4; Connector Shell Size:18; Connecting Termination:Solder; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| AK4588 | 2/8 CHANNEL AUDIO CODEC WITH DIR |
| AK4588VQ | 2/8 CHANNEL AUDIO CODEC WITH DIR |
| AK4589VQ | 2/8-Channel Audio CODEC with DIR |
| AK4591 | 24bit 4ch ADC + 24bit 6ch DAC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4586VQ | 制造商:AKM 制造商全稱:AKM 功能描述:MULTI CHANNEL AUDIO CODEC WITH DIR |
| AK4588 | 制造商:AKM 制造商全稱:AKM 功能描述:2/8 CHANNEL AUDIO CODEC WITH DIR |
| AK4588VQ | 制造商:AKM 制造商全稱:AKM 功能描述:2/8 CHANNEL AUDIO CODEC WITH DIR |
| AK4589 | 制造商:AKM 制造商全稱:AKM 功能描述:2/8 CHANNEL AUDIO CODEC WITH DIR |
| AK4589_1 | 制造商:AKM 制造商全稱:AKM 功能描述:2/8-Channel Audio CODEC with DIR |
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