I 2 S Mode - Analog Devices ADSP-21261 SHARC Hardware Reference Manual

SPORT Operation Modes
SPORTX_CLK
SPORTx_FS/WS
LEFT-JUSTI FIED SAMPLE
PAIR MO DE DATA O R
SPORTX_DA OR SPORTX_DB
Figure 9-3. Word Select Timing in Left-justified Sample Pair Mode
1 This figure illustrates only one possible combination of settings attainable in the Left-justified Sam-
ple Pair mode. In this example case, OPMODE =1, LAFS =1, and FRFS =1. For additional combina-
tions, refer to Table 9-1 on page
2
I S Mode
2
I S mode is a three-wire serial bus standard protocol for transmission of
two-channel (stereo) Pulse Code Modulation (PCM) digital audio data, in
which each sample is transmitted in MSB-first format. Many of today's
analog and digital audio front-end devices support the I
including:
• Audio D/A and A/D converters
• PC multimedia audio controllers
• Digital audio transmitters and receivers that support serial digital
audio transmission standards, such as AES/EBU, SP/DIF, IEC958,
CP-340, and CP-1201
• Digital audio signal processors
• Dedicated digital filter chips
• Sample rate converters
9-18
LSB n-1 MSB n
SAMPLE n-1
9-10.
ADSP-2126x SHARC Processor Hardware Reference
LSB n
SAMPLE n
MSB n+1
SAMPLE n+1
1
2
S protocol