參數(shù)資料
型號： AK4538
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： 16Bit DS CODEC with MIC/HP/SPK-AMP
中文描述： 16位副編解碼器麥克風/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù)： 23/70頁
文件大?。?/td> 485K
代理商： AK4538
ASAHI KASEI
[AK4538]
MS0198-E-01
2003/5
- 23 -
n
System Reset
Upon power-up, reset the AK4538 by bringing the PDN pin = “L”. This ensures that all internal registers reset to their
initial values.
The ADC enters an initialization cycle that starts when the PMADC bit is changed from “0” to “1”. The initialization cycle
time is 2081/fs, or 47.2ms@fs=44.1kHz. During the initialization cycle, the ADC digital data outputs of both channels are
forced to a 2's compliment, “0”. The ADC output reflects the analog input signal after the initialization cycle is complete.
The DAC does not require an initialization cycle.
n
Audio Interface Format
Three types of data formats are available and are selected by setting the DIF1-0 bits. In all modes, the serial data is MSB
first, 2’s complement format. The SDTO is clocked out on the falling edge of BICK and the SDTI is latched on the rising
edge. All data formats can be used in both master and slave modes. LRCK and BICK are output from AK4538 in master
mode, but must be input to AK4538 in slave mode. If 16-bit data that ADC outputs is converted to 8-bit data by removing
LSB 8-bit,
1 at 16bit data is converted to
1 at 8-bit data. And when the DAC playbacks this 8-bit data,
1 at 8-bit data
will be converted to
256 at 16-bit data and this is a large offset. This offset can be removed by adding the offset of 128 to
16-bit data before converting to 8-bit data.
Mode
DIF1
DIF0
SDTO (ADC)
0
0
0
MSB justified
1
0
1
MSB justified
2
1
0
I
2
S
3
1
1
N/A
Table 13. Audio Interface Format
LRCK
SDTI (DAC)
LSB justified
MSB justified
I
2
S
N/A
BICK
≥
32fs
≥
32fs
≥
32fs
N/A
Figure
Figure 16
Figure 17
Figure 18 Default
-
BICK(32fs)
SDTO(o)
SDTI(i)
0
15 14
15 14
1
10
13
13
2 3
7
7 6
5 4 3 2
1 0
6
5 4 3
1 0
2
9
11 12 13 14 15 0
1 2 3
15 14 13
1
0
15
15
7 6
5 4 3 2
1 0
10
9
11 12 13 14 15
BICK(64fs)
0 1
16
2 3
17 18
31 0
1 2 3
1
0
16 17 18
31
SDTO(o)
SDTI(i)
15 14 13
Don't Care
1 0
1
15
15
2
1 0
15
0
15 14
15
14
Don't Care
15:MSB, 0:LSB
Lch Data
Rch Data
Figure 16. Mode 0 Timing
相關(guān)PDF資料
PDF描述
AK4538VN 16Bit DS CODEC with MIC/HP/SPK-AMP
AK4541VQ AC’97 Rev 2.1 Multimedia Audio CODEC
AK4541 AC’97 Rev 2.1 Multimedia Audio CODEC
AK4543 AC’97 Rev 2.1 Multimedia Audio CODEC
AK4543VQ AC’97 Rev 2.1 Multimedia Audio CODEC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4538VN 制造商:AKM 制造商全稱:AKM 功能描述:16Bit DS CODEC with MIC/HP/SPK-AMP
AK4541 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC
AK4541VQ 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC
AK4543 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC
AK4543VQ 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC
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