Datasheet

817
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
Figure 35-49. Slave Node Configuration, NACT = PUBLISH
Figure 35-50. Slave Node Configuration, NACT = SUBSCRIBE
Figure 35-51. Slave Node Configuration, NACT = IGNORE
35.7.8.16 LIN Frame Handling With The PDC
The USART can be used in association with the PDC in order to transfer data directly into/from the on- and off-chip
memories without any processor intervention.
The PDC uses the trigger flags, TXRDY and RXRDY, to write or read into the USART. The PDC 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 PDC in the USART is always a byte.
Break Synch Protected
Identifier
Data 1Data N Checksum
TXRDY
Write
US_THR
Read
US_LINID
Data 1Data 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 1Data N Checksum
Data 1
Data N-1
Data N-1 Data NData N-2
TXRDY
Read
US_RHR
Read
US_LINID
RXRDY
LINIDRX
LINTC
Break Synch Protected
Identifier
Data 1Data N ChecksumData N-1