Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK Hoja De Datos
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Los códigos de productos
ATSAM4L-XSTK
669
42023E–SAM–07/2013
ATSAM4L8/L4/L2
26.7.3.2
Master Mode Flow Diagram
Figure 26-6. Master Mode Flow Diagram
SPI Enable
CSAAT ?
PS ?
1
0
0
1
1
NPCS = TDR(PCS)
NPCS = MR(PCS)
Delay DLYBS
Serializer = TDR(TD)
TDRE = 1
Data Transfer
RDR(RD) = Serializer
RDRF = 1
TDRE ?
NPCS = 0xF
Delay DLYBCS
Fixed
peripheral
Variable
peripheral
Delay DLYBCT
0
1
CSAAT ?
0
TDRE ?
1
0
PS ?
0
1
TDR(PCS)
= NPCS ?
no
yes
MR(PCS)
= NPCS ?
no
NPCS = 0xF
Delay DLYBCS
NPCS = TDR(PCS)
NPCS = 0xF
Delay DLYBCS
NPCS = MR(PCS),
TDR(PCS)
Fixed
peripheral
Variable
peripheral
- NPCS defines the current Chip Select
- CSAAT, DLYBS, DLYBCT refer to the fields of the
Chip Select Register corresponding to the Current Chip Select
- When NPCS is 0xF, CSAAT is 0.
- CSAAT, DLYBS, DLYBCT refer to the fields of the
Chip Select Register corresponding to the Current Chip Select
- When NPCS is 0xF, CSAAT is 0.