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SPI CONTROLLER
2.1.7
SPI Transfer Format
The S5PC100 supports 4 different formats for data transfer. Figure 8.3-2 describes four waveforms for SPICLK.
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
Cycle
SPICLK
MOSI
MISO
8.3-4
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 8.3-2 SPI Transfer Format
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
S5PC100 USER'S MANUAL (REV1.0)
8
LSB
LSB
*MSB
8
LSB
LSB
8
LSB
LSB
*MSB
8
LSB
LSB
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