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

687

SAM4S Series [DATASHEET]

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



0: SPI_TCR

 or SPI_TNCR

 has a value other than 0.

1: Both SPI_TCR

 and SPI_TNCR

 have a value of 0.



0: No rising edge detected on NSS pin since the last read.
1: A rising edge occurred on NSS pin since the last read.



0: As soon as data is written in SPI_TDR.
1: SPI_TDR and internal shift register are empty. If a transfer delay has been defined, TXEMPTY is set after the end of this 

delay.



0: No underrun has been detected since the last read of SPI_SR.
1: A transfer starts whereas no data has been loaded in SPI_TDR.



0: SPI is disabled.
1: SPI is enabled.

Note:

1. SPI_RCR, SPI_RNCR, SPI_TCR, SPI_TNCR are physically located in the PDC.