Table of Contents
Advertisement
SPI CONTROLLER
SPI TRANSFER FORMAT
The S3C6400X supports 4 different formats to transfer the data. Figure 29-1 describes four waveforms for
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.
29-4
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 29-1. SPI Transfer Format
S3C6400X RISC MICROPROCESSOR
4
5
6
7
4
3
2
1
4
3
2
1
4
5
6
7
4
3
2
1
LSB
4
3
2
1
4
5
6
7
4
3
2
1
4
3
2
1
4
5
6
7
4
3
2
1
LSB
4
3
2
1
8
LSB
LSB
*MSB
8
LSB
8
LSB
LSB
*MSB
8
LSB
Advertisement
Table of Contents
