參數(shù)資料
型號(hào): DSD1793
英文描述: DIODE, SMT SCHOTTKY 3A 60V SK36 SMC
中文描述: 24位192千赫采樣高級(jí)分段音頻立體聲數(shù)模轉(zhuǎn)換器
文件頁(yè)數(shù): 33/47頁(yè)
文件大小: 428K
代理商: DSD1793
DSD1793
SLES075A MARCH 2003 REVISED JANUARY 2004
www.ti.com
39
Requirements for Bit Clock and System Clock
The bit clock (DBCK) for DSD mode is required at pin 4 of the DSD1793. The frequency of the bit clock can be N
times the sampling frequency. Generally, N is 64 in DSD applications.
The interface timing between the bit clock and DSDL, DSDR is required to meet the setup and hold time specifications
shown in Figure 39.
The system clock is necessary for the initialization sequence and the I2C interface operation.
t = 1/(64
× 44.1 kHz)
D1
DSDL
DSDR
D0
D2
D3
D4
DBCK
Figure 38. Normal Data Output Form From DSD Decoder
DSDL
DSDR
t(BCH)
DBCK
t(BCL)
t(BCY)
1.4 V
t(DS)
t(DH)
PARAMETER
MIN
MAX
UNITS
t(BCY) DBCK pulse cycle time
85(1)
ns
t(BCH) DBCK high-level time
30
ns
t(BCL) DBCK low-level time
30
ns
t(DS)
DSDL, DSDR setup time
10
ns
t(DH)
DSDL, DSDR hold time
10
ns
(1) 2.8224 MHz × 4. (2.8224 MHz = 64 × 44.1 kHz. This value is specified as a
sampling rate of DSD.)
Figure 39. Timing for DSD Audio Interface
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