S3C2416X RISC MICROPROCESSOR
IIS MULTI AUDIO INTERFACE
23-5
6 AUDIO SERIAL DATA FORMAT
6.1 IIS-BUS FORMAT
The IIS bus has four lines including serial data input I2SSDI, serial data output I2SSDO, left/right channel select
clock I2SLRCLK, and serial bit clock I2SSCLK; the device generating I2SLRCLK and I2SSCLK is the master.
Serial data is transmitted in 2's complement with the MSB first with a fixed position, whereas the position of the
LSB depends on the word length. The transmitter sends the MSB of the next word at one clock period after the
I2SLRCLK is changed. Serial data sent by the transmitter may be synchronized with either the trailing or the
leading edge of the clock signal. However, the serial data must be latched into the receiver on the leading edge of
the serial clock signal, and so there are some restrictions when transmitting data that is synchronized with the
leading edge.
The LR channel select line indicates the channel being transmitted. I2SLRCLK may be changed either on a
trailing or leading edge of the serial clock, but it does not need to be symmetrical. In the slave, this signal is
latched on the leading edge of the clock signal. The I2SLRCLK line changes one clock period before the MSB is
transmitted. This allows the slave transmitter to derive synchronous timing of the serial data that will be set up for
transmission. Furthermore, it enables the receiver to store the previous word and clear the input for the next word.
6.2 MSB (LEFT) JUSTIFIED
MSB-Justified (Left-Justified) format is similar to IIS bus format, except that in MSB-justified format, the transmitter
always sends the MSB of the next word at the same time whenever the I2SLRCLK is changed.
6.3 LSB (RIGHT) JUSTIFIED
LSB-Justified (Right-Justified) format is opposite to the MSB-justified format. In other word, the transferring serial
data is aligned with ending point of I2SLRCLK transition.
Содержание S3C2416
Страница 33: ...S3C2416X RISC MICROPROCESSOR PRODUCT OVERVIEW 1 5 3 BLOCK DIAGRAM Figure 1 1 S3C2416X Block Diagram ...
Страница 38: ...PRODUCT OVERVIEW S3C2416X RISC MICROPROCESSOR 1 10 153 AIN 1 U14 195 EINT 10 GPG2 K15 237 SDATA 14 C18 ...
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Страница 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
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Страница 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Страница 455: ...S3C2416X RISC MICROPROCESSOR HSMMC CONTROLLER 20 9 4 9 SD COMMAND ISSUE SEQUENCE Figure 20 9 Timeout Setting Sequence ...
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Страница 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Страница 653: ...S3C2416X RISC MICROPROCESSOR ELECTRICAL DATA 26 15 Figure 26 14 SDRAM READ WRITE Timing Trp 2 Trcd 2 Tcl 2 DW 16 bit ...
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Страница 672: ...MECHANICAL DATA S3C2416X RISC MICROPROCESSOR 30 2 Figure 27 2 330 FBGA 1414 Package Dimension 2 Bottom View ...