Datasheet

340
AT32UC3A
26.8.2 USART Control Register
Name: CR
Access Type: Write-only
Offset: 0x0
Reset Value: -
• RTSDIS/RCS: Request to Send Disable/Release SPI Chip Select
– If USART does not operate in SPI Master Mode (MODE … 0xE):
0: No effect.
1: Drives the pin RTS to 1.
– If USART operates in SPI Master Mode (MODE = 0xE):
RCS = 0: No effect.
RCS = 1: Releases the Slave Select Line NSS (RTS pin).
• RTSEN/FCS: Request to Send Enable/Force SPI Chip Select
– If USART does not operate in SPI Master Mode (MODE … 0xE):
0: No effect.
1: Drives the pin RTS to 0.
– If USART operates in SPI Master Mode (MODE = 0xE):
FCS = 0: No effect.
FCS = 1: Forces the Slave Select Line NSS (RTS pin) to 0, even if USART is no transmitting, in order to address SPI slave
devices supporting the CSAAT Mode (Chip Select Active After Transfer).
• RETTO: Rearm Time-out
0: No effect
1: Restart Time-out
• RSTNACK: Reset Non Acknowledge
0: No effect
1: Resets NACK in CSR.
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
– – – – RTSDIS/RCS RTSEN/FCS – –
15 14 13 12 11 10 9 8
RETTO RSTNACK RSTIT SENDA STTTO STPBRK STTBRK RSTSTA
7 6 5 4 3 2 1 0
TXDIS TXEN RXDIS RXEN RSTTX RSTRX – –
32058K
AVR32-01/12