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HS_SPI CONTROLLER
HS_SPI TRANSFER FORMAT
The S3C2451X supports 4 different format to transfer the data. Figure 29-1 shows four waveforms for
HS_SPICLK..
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
20-4
Specifications and information herein are subject to change without notice.
CPOL = 0, CPHA = 0 (Format A)
1
2
3
MSB
6
5
MSB
6
5
*MSB : MSB of previous frame
CPOL = 0, CPHA = 1 (Format B)
1
2
3
MSB
6
5
LSB*
MSB
6
5
LSB* : LSB of next frame
CPOL = 1, CPHA = 0 (Format A)
1
2
3
MSB
6
5
MSB
6
5
*MSB : MSB of previous frame
CPOL = 1, CPHA = 1 (Format B)
1
2
3
MSB
6
5
LSB*
MSB
6
5
LSB* : LSB of next frame
Figure 20-1. HS_SPI Transfer Format
S3C2451X RISC MICROPROCESSOR
4
5
6
7
4
3
2
1
4
3
2
1
4
5
6
7
4
3
2
1
4
3
2
1
4
5
6
7
4
3
2
1
4
3
2
1
4
5
6
7
4
3
2
1
4
3
2
1
8
LSB
LSB
*MSB
8
LSB
LSB
8
LSB
LSB
*MSB
8
LSB
LSB
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