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S5PC110_UM
3.4.2.4 Slave Selection Signal Control Signal
•
CS_REG0, R/W, Address = 0xE130_000C
•
CS_REG1, R/W, Address = 0xE140_000C
CS_REGn
NCS_TIME_COUNT
Reserved
AUTO_N_MANUAL
NSSOUT
If AUTO_N_MANUAL is set, NSSOUT is controlled by SPI controller and data transfer is not performed
continuously.
−
Unit data size depends on CH_WIDTH.
SPICLK
MOSI
MSB
6
MISO
MSB
6
NSSOUT
Figure 3-2
Bit
[9:4]
NSSOUT inactive time =
((nCS_time_count+3)/2) x SPICLKout
[3:2]
Reserved
[1]
Chip select toggle manual or auto selection
0 = Manual
1 = Auto
[0]
Slave selection signal (manual only)
0 = Active
1 = Inactive
5
4
3
2
1
5
4
3
2
1
Auto Chip Select Mode Waveform (CPOL=0, CPHA=0, CH_WIDTH=Byte)
Description
LSB
*MSB
6
LSB
*MSB
6
NCS_TIME_COUNT
3 SERIAL PERIPHERAL INTERFACE
5
4
3
2
1
5
4
3
2
1
Initial State
0
-
0
1
*LSB
*LSB **MSB
3-12
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