參數(shù)資料
型號(hào)： DSD1608PAH
英文描述： 8-CHANNEL, ENHANCED MULTIFORMAT, DELTA-SIGMA, DIGITAL-TO-ANALOG CONVERTER
中文描述： 8通道，增強(qiáng)多格式，Δ-Σ，數(shù)字模擬轉(zhuǎn)換器
文件頁(yè)數(shù)： 16/41頁(yè)
文件大?。?/td> 293K
代理商： DSD1608PAH
DSD1608
SLES040
–
JUNE 2002
www.ti.com
16
Audio Serial Interface
The DSD1608 has two audio serial interface ports: PCM audio interface port and DSD audio interface port.
In the PCM mode, the audio interface is a 3-wire serial port. It includes PLRCK (pin 51), PBCK (pin 50), and
PDATA1
–
PDATA4 (pins 46
–
49). PBCK is the serial audio bit clock, and it is used to clock the serial data present on
PDATA1
–
4 into the audio interface serial shift register. Serial data is clocked into the DSD1608 on the rising edge
of PBCK. PLRCK is the serial audio left/right word clock. It is used to latch serial data into the serial audio interface
internal registers.
The DSD1608 requires the synchronization of PLRCK to the system clock, but does not require a specific phase
relation between PLRCK and system clock.
If the relationship between PLRCK and system clock changes more than
±
6 PBCK, internal operation is initialized
within 1/f
S
and analog outputs are forced to 0.5 V
CC
until re-synchronization between PLRCK and the system clock
is completed.
In the DSD mode, the audio interface is a 2-wire serial port. DBCK (pin 37) is the serial audio bit clock, and it is used
to clock the individual direct stream digital (DSD) audio data on DSD1
–
DSD8 (pins 38
–
45). DSD data is clocked into
the DSD1608 on the rising edge of DBCK. DBCK must be synchronous with the system clock, but does not require
a specific phase relation to the system clock. DBCK is operated at the sampling frequency f
S
; the f
S
of DSD is
64
×
44.1 kHz, nominal.
Audio Data Formats and Timing
In the PCM mode, the DSD1608 supports industry-standard audio data formats, including standard, I
2
S, and
left-justified. The data formats are shown in Figure 23. Data formats are selected using the format bits, FMT[2:0],
in control register 10. The default data format is 24-bit standard format. All formats require binary 2s complement,
MSB-first audio data. Figure 24 shows a detailed timing diagram for the serial audio interface.
In the DSD mode, the DSD1608 supports a DSD audio data format. The data formats are shown in Figure 25.
Figure 26 shows a detailed timing diagram for the DSD audio data interface.
Serial Control Interface
The serial control interface is a 4-wire serial port which operates completely asynchronously from the serial audio
interface and the system clock. The serial control interface is used to access the on-chip mode registers. The control
interface includes MDI (pin 2), MDO (pin 5), MC (pin 4), and MS (pin 3). MDI is the serial data input, used to program
the mode registers. MDO is the serial data output, used to read back the values of the mode registers. MC is the serial
bit clock, used to shift data into the control port, and MS is the chip select for the control port.
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DSD1608PAHR 8-CHANNEL, ENHANCED MULTIFORMAT, DELTA-SIGMA, DIGITAL-TO-ANALOG CONVERTER
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