Datasheet

797
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
• FCS: Force SPI Chip Select
Applicable if USART operates in SPI master mode (USART_MODE = 0xE):
0: No effect.
1: Forces the Slave Select Line NSS (RTS pin) to 0, even if USART is not transmitting, in order to address SPI slave
devices supporting the CSAAT mode (Chip Select Active After Transfer).
• RCS: Release SPI Chip Select
Applicable if USART operates in SPI master mode (USART_MODE = 0xE):
0: No effect.
1: Releases the Slave Select Line NSS (RTS pin).