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HS_SPI CONTROLLER
4.6 HS_SPI TRANSFER FORMAT
The S3C2416 supports 4 different format to transfer the data. Figure 20-1 shows four waveforms for HS_SPICLK.
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
19-4
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 19-1. HS_SPI Transfer Format
S3C2416X 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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