Preliminary
HS_SPI CONTROLLER
S3C2451X RISC MICROPROCESSOR
20-4
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.
HS_SPI TRANSFER FORMAT
The S3C2451X supports 4 different format to transfer the data. Figure 29-1 shows four waveforms for
HS_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 20-1. HS_SPI Transfer Format