参数资料
型号: ADZS-21469-EZBRD
厂商: Analog Devices Inc
文件页数: 43/62页
文件大小: 0K
描述: KIT EVAL EZ BOARD ADSP-21469
特色产品: SHARC? 21469 EZ-KIT? and EZ-Board? for SHARC Processors
标准包装: 1
系列: SHARC®
类型: DSP
适用于相关产品: ADSP-2146x
所含物品:
Preliminary Technical Data
ADSP-21462/ADSP-21465/ADSP-21467/ADSP-21469
S/PDIF Transmitter
Serial data input to the S/PDIF transmitter can be formatted as
left justified, I 2 S, 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 29 shows the right-justified mode. LRCLK is high for the
left channel and low for the right channel. Data is valid on the
rising edge of SCLK. The MSB is delayed 12-bit clock periods
(in 20-bit output mode) or 16-bit clock periods (in 16-bit output
mode) from an LRCLK transition, so that when there are 64
SCLK periods per LRCLK period, the LSB of the data will be
right-justified to the next LRCLK transition.
DAI_P20-1
LRCLK
DAI_P20-1
S CLK
LEFT CHANNEL
RIGHT CHANNEL
DAI_P20-1
L S B
MSB
M S B-1
M S B-2
L S B+2 L S B+1
L S B
M S B
M S B-1
M S B-2
L S B+2
L S B+1
L S B
S DATA
Figure 29. Right-Justified Mode
Figure 30 shows the default I 2 S-justified mode. LRCLK is low
for the left channel and HI for the right channel. Data is valid on
the rising edge of SCLK. The MSB is left-justified to an LRCLK
transition but with a single SCLK period delay.
RIGHT CHANNEL
DAI_P20-1
LRCLK
DAI_P20-1
S CLK
LEFT CHANNEL
DAI_P20-1
M S B
M S B-1
M S B-2
L S B+2 L S B+1
L S B
M S B
M S B-1
M S B-2
L S B+2
L S B+1
L S B
M S B
S DATA
Figure 30. I 2 S-Justified Mode
Figure 31 shows the left-justified mode. LRCLK is high for the
left channel and LO for the right channel. Data is valid on the
rising edge of SCLK. The MSB is left-justified to an LRCLK
transition with no MSB delay.
DAI_P20-1
LRCLK
DAI_P20-1
S CLK
LEFT CHANNEL
RIGHT CHANNEL
DAI_P20-1
MSB
M S B-1
M S B-2
L S B+2
L S B+1
L S B
M S B
M S B-1
M S B-2
L S B+2
L S B +1
L S B
M S B
M S B+1
S DATA
Figure 31. Left-Justified Mode
Rev. PrC
| Page 43 of 62 | January 2009
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