參數資料
型號: ADSP-21477BCPZ-1A
廠商: Analog Devices Inc
文件頁數: 48/76頁
文件大小: 0K
描述: IC DSP SHARK 200MHZ 88LFCSP
標準包裝: 1
系列: SHARC®
類型: 浮點
接口: DAI,DPI,I²C,SPI,SPORT,UART/USART
時鐘速率: 200MHz
芯片上RAM: 2Mb
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.20V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 88-VFQFN 裸露焊盤,CSP
供應商設備封裝: 88-LFCSP-VQ(12x12)
包裝: 托盤
Rev. C
|
Page 52 of 76
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July 2013
S/PDIF Transmitter
Serial data input to the S/PDIF transmitter can be formatted as
left-justified, I2S, or right-justified with word widths of 16, 18,
20, or 24 bits. The following sections provide timing for the
transmitter.
S/PDIF Transmitter-Serial Input Waveforms
Figure 31 shows the right-justified mode. Frame sync is high for
the left channel and low for the right channel. Data is valid on
the rising edge of serial clock. The MSB is delayed the minimum
in 24-bit output mode or the maximum in 16-bit output mode
from a frame sync transition, so that when there are 64 serial
clock periods per frame sync period, the LSB of the data is right-
justified to the next frame sync transition.
Figure 32 shows the default I2S-justified mode. The frame sync
is low for the left channel and high for the right channel. Data is
valid on the rising edge of serial clock. The MSB is left-justified
to the frame sync transition but with a delay.
Figure 33 shows the left-justified mode. The frame sync is high
for the left channel and low for the right channel. Data is valid
on the rising edge of serial clock. The MSB is left-justified to the
frame sync transition with no delay.
Table 44. S/PDIF Transmitter Right-Justified Mode
Parameter
Nominal
Unit
Timing Requirement
tRJD
FS to MSB Delay in Right-Justified Mode
16-Bit Word Mode
18-Bit Word Mode
20-Bit Word Mode
24-Bit Word Mode
16
14
12
8
SCLK
Figure 31. Right-Justified Mode
Table 45. S/PDIF Transmitter I2S Mode
Parameter
Nominal
Unit
Timing Requirement
tI2SD
FS to MSB Delay in I2S Mode
1
SCLK
Figure 32. I2S-Justified Mode
MSB
LEFT/RIGHT CHANNEL
LSB
MSB–1
MSB–2
LSB+2
LSB+1
DAI_P20–1
FS
DAI_P20–1
SCLK
DAI_P20–1
SDATA
tRJD
MSB
LEFT/RIGHT CHANNEL
LSB
MSB–1
MSB–2
LSB+2
LSB+1
DAI_P20–1
FS
DAI_P20–1
SCLK
DAI_P20–1
SDATA
tI2SD
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