Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Fiche De Données

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

670

SPI Enable

CSAAT ?

PS ?

1

0

0

1

1

NPCS = SPI_TDR(PCS)

NPCS = SPI_MR(PCS)

Delay DLYBS

Serializer = SPI_TDR(TD)

TDRE = 1

Data Transfer

SPI_RDR(RD) = Serializer

RDRF = 1

TDRE ?

NPCS deasserted

Delay DLYBCS

Fixed

 peripheral

Variable 

peripheral

Delay DLYBCT

0

1

CSAAT ?

0

TDRE ?

1

0

PS ?

0

1

SPI_TDR(PCS)

= NPCS ?

no

yes

SPI_MR(PCS)

= NPCS ?

no

NPCS deasserted

Delay DLYBCS

NPCS = SPI_TDR(PCS)

NPCS deasserted

Delay DLYBCS

NPCS = SPI_MR(PCS),

                SPI_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