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參數(shù)資料
| 型號： | KD16901 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | Audio Effect Processor(音頻效果處理器) |
| 中文描述： | 音頻效果器（音頻效果處理器） |
| 文件頁數(shù)： | 14/68頁 |
| 文件大?。?/td> | 381K |
| 代理商： | KD16901 |
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HARDWARE DESCRIPTION
AUDIO EFFECT PROCESSOR
2-14
General Description of Digital Audio Interface of the KD16901
The digital audio interface of the KD16901 consists of 3 blocks mainly: CIU, DSIU1 and DSIU2. The CIU block is
the interface block for the built-in codec. The DSIU1 and DSIU2 blocks are for external ADC and DAC interfaces.
The DSIU2 and CIU are mutually exclusive in a sense that only one of the two is working. The interface blocks can
work either slave or master mode (for DSIU1 output, both modes) depending on whether the KD16901 supplies the
bit clocks and the LR clocks (master), or DAC (ADC) provides the clocks (slave). For example, the DSIU1 takes the
digital audio outputs in master/32 Fs mode, which means that the KD16901 (or DSIU1) provides the bit and the LR
clocks to the DAC and the audio data format 32 Fs (32 bit clocks in a LR clock period).
When an external ADC or (and) DAC is used, it is strongly recommended to use the clock, CLKO (pin #64),
provided by KD16901 as the master clock for clock synchronization.
Figure 3. Digital Audio Interface Formats of the KD16901
NOTE
“support all formats” means all formats of the data length and the sampling rate listed in Table 4 through Table 6
Codec Interface
The KD16901 has on-chip16 bit stereo ADC and DAC with digital filters and serial interfaces to provide CD quality
sound for audio application. The digital A/D decimation filter takes in the encoded signals from
Σ
A/D modulator,
and outputs 16 bit stereo digital audio data through the serial interface. The D/A interpolation filter takes 16 bit
stereo audio data from the serial interface, and outputs one bit signal to the
Σ
D/A. The oversampling rate of the
digital filter is 128xFs, where Fs can be varied from 4 KHz to 48 KHz and can be changed on the fly. The serial data
interface is running at 32xFs and supports both right justified format and I
2
S data format. To set input and output
formats of codec, see Table 7.
DSIU2
CIU
ADC
DAC
CODEC
DSIU1
KD16901
master
(32Fs)
master
(32Fs)
slave
(support
all formats*)
master
(32Fs, 16bit)
slave
(support all formats*)
master & slave
(support all formats*)
ADC
DAC
ADC
DAC
16bit
16bit
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