S/PDIF Transmitter
For the ADSP-21371, 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 26 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 serial clock. The MSB is delayed 12-bit clock peri-
ods (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 serial clock periods per LRCLK period, the LSB of the data
will be right-justified to the next LRCLK transition.
S/PDIF transmitter information does not apply to the
ADSP-21375.
Figure 27 shows the default I 2 S-justified mode. LRCLK 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 an
LRCLK transition but with a single serial clock period delay.
Figure 28 shows the left-justified mode. LRCLK 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 an LRCLK
transition with no MSB delay.
DAI_P20–1
FS
DAI_P20–1
SCLK
t RJD
LEFT/RIGHT CHANNEL
DAI_P20–1
SDATA
LSB
MSB
MSB–1
MSB–2
LSB+2
LSB+1
LSB
Figure 26. Right-Justified Mode
DAI_P20–1
FS
DAI_P20–1
SCLK
t I2SD
LEFT/RIGHT CHANNEL
DAI_P20–1
SDATA
MSB
MSB–1
MSB–2
LSB+2
LSB+1
LSB
Figure 27. I 2 S-Justified Mode
DAI_P20–1
FS
DAI_P20–1
SCLK
t LJD
LEFT/RIGHT CHANNEL
DAI_P20–1
SDATA
MSB
MSB–1
MSB–2
LSB+2
LSB+1
LSB
Figure 28. Left-Justified Mode
Rev. D | Page 41 of 56 | April 2013
相关PDF资料
ADZS-21469-EZLITE KIT EVAL EZ LITE ADSP-21469
ADZS-21479-EZLITE KIT EVAL EZ BOARD ADSP-2147X
ADZS-21489-EZLITE KIT EVAL EZ BOARD ADSP-2148X
ADZS-218X-ICE-2.5V EMULATOR SRL FOR ADDS-218X-ICE
ADZS-BF506F-EZLITE KIT EVAL EZLITE ADSP-BF506F
ADZS-BF518F-EZLITE KIT EZ LITE BF512F/14F/16F/18F
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相关代理商/技术参数
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