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PRELIMINARY
SPI CONTROLLER
S3C6400X RISC MICROPROCESSOR
29-4
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
SPI TRANSFER FORMAT
The S3C6400X supports 4 different formats to transfer the data. Figure 29-1 describes four waveforms for
SPICLK..
Cycle
MOSI
1
2
3
4
5
6
7
8
MSB
6
5
4
3
2
1
LSB
6
5
4
3
2
1
LSB
SPICLK
MISO
MSB
CPOL = 1, CPHA = 1 (Format B)
Cycle
MOSI
1
2
3
4
5
6
7
8
MSB
6
5
4
3
2
1
LSB
6
5
4
3
2
1
LSB
*MSB
SPICLK
MISO
MSB
CPOL = 1, CPHA = 0 (Format A)
Cycle
MOSI
1
2
3
4
5
6
7
8
6
5
4
3
2
1
LSB
6
5
4
3
2
1
LSB
SPICLK
MISO
LSB*
CPOL = 0, CPHA = 1 (Format B)
Cycle
MOSI
1
2
3
4
5
6
7
8
MSB
6
5
4
3
2
1
LSB
6
5
4
3
2
1
LSB
*MSB
SPICLK
MISO
MSB
CPOL = 0, CPHA = 0 (Format A)
LSB*
MSB
MSB
*MSB : MSB of previous frame
LSB* : LSB of next frame
LSB* : LSB of next frame
*MSB : MSB of previous frame
Figure 29-1. SPI Transfer Format