Atmel Evaluation Kit AT91SAM9X35-EK AT91SAM9X35-EK Data Sheet
Product codes
AT91SAM9X35-EK
804
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
Figure 39-48. Slave Node Configuration, NACT = PUBLISH
Figure 39-49. Slave Node Configuration, NACT = SUBSCRIBE
Figure 39-50. Slave Node Configuration, NACT = IGNORE
39.7.8.16 LIN Frame Handling With The DMAC
The USART can be used in association with the DMAC in order to transfer data directly into/from the on- and off-chip
memories without any processor intervention.
memories without any processor intervention.
The DMAC uses the trigger flags, TXRDY and RXRDY, to write or read into the USART. The DMAC always writes in the
Transmit Holding register (US_THR) and it always reads in the Receive Holding register (US_RHR). The size of the data
written or read by the DMAC in the USART is always a byte.
Transmit Holding register (US_THR) and it always reads in the Receive Holding register (US_RHR). The size of the data
written or read by the DMAC in the USART is always a byte.
Break
Synch
Protected
Identifier
Data 1
Data N
Checksum
TXRDY
Write
US_THR
Read
US_LINID
Data 1
Data 3
Data N-1
Data N
RXRDY
LINIDRX
Data 2
LINTC
TXRDY
Read
US_RHR
Read
US_LINID
RXRDY
LINIDRX
LINTC
Break
Synch
Protected
Identifier
Data 1
Data N
Checksum
Data 1
Data N-1
Data N-1
Data N
Data N-2
TXRDY
Read
US_RHR
Read
US_LINID
RXRDY
LINIDRX
LINTC
Break
Synch
Protected
Identifier
Data 1
Data N
Checksum
Data N-1