參數(shù)資料
型號: AK4584VQ
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 24Bit 96kHz Audio CODEC with DIT/DIR
中文描述: 24位96kHz的音頻編解碼器與動態(tài)網(wǎng)/迪爾
文件頁數(shù): 29/53頁
文件大小: 351K
代理商: AK4584VQ
ASAHI KASEI
[AK
4584]
MS0118-E-00
2001/11
- 29 -
Audio Interface Format
Five serial modes are supported as shown in Table 16, and are selected by the DIF2-0 bits. In all modes, the serial data is
in MSB first, 2’s compliment format. The SDTO is clocked out on the falling edge of BICK and the SDTI is latched on the
rising edge. The audio interface supports both master and slave modes. In master mode, BICK and LRCK are output with
the BICK frequency fixed to 64fs and the LRCK frequency fixed to fs.
When the format is equal or less than 20-bit (mode 0-1), LSBs in the sub-frame are truncated. In mode 2-4, the last 4LSBs
are auxiliary data (see Figure 10).
Mode 2, 3, 4 in SDTI input formats can be used for 16-20bit data by zeroing the unused LSBs.
sub-frame of IEC60958
0
preamble
3 4
LSB
Aux.
MSB
23
7 8
11 12
V
U
C
P
27 28 29 30 31
LSB
MSB
0
AK4584 Audio Data (SDTO, MSB First)
Figure 10. Bit Structure
Mode
0
1
2
3
4
DIF2
0
0
0
0
1
DIF1
0
0
1
1
0
DIF0
0
1
0
1
0
SDTO
SDTI
LRCK
H/L
H/L
H/L
L/H
H/L
BICK
32fs
40fs
48fs
48fs
48fs
24bit, MSB justified
24bit, MSB justified
24bit, MSB justified
24bit, I
2
S Compatible
24bit, MSB justified
Table 16. Audio Data Format
16bit, LSB justified
20bit, LSB justified
24bit, MSB justified
24bit, I
2
S Compatible
24bit, LSB justified
Default
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