Atmel AT32UC3A3128, Manual

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32072H–AVR32–10/2012
AT32UC3A3
Figure 25-40. Master Node with Peripheral DMA Controller (LINMR.PDCM=1)
25.6.12.2 Slave Node Configuration
In this mode, the Peripheral DMA Controller transfers only data. The user reads the Identifier
from LINIR, and selects LIN mode by writing to LINMR. When NACT=PUBLISH the data is in the
write buffer, while the read buffer contains the data when NACT=SUBSCRIBE.
IMPORTANT: If in slave mode, LINMR.NACT is already configured correctly as PUBLISH, the
LINMR register must still be written with this value in order to set CSR.TXRDY, and to request
the corresponding Peripheral DMA Controller write transfer.
Figure 25-41. Slave Node with Peripheral DMA Controller
25.6.13 Wake-up Request
Any node in a sleeping LIN cluster may request a wake-up. By writing to the Wakeup Signal
Type bit (LINMR.WKUPTYP), the user can choose to send either a LIN 1.3 (WKUPTYP is one )
or a LIN 2.0 (WKUPTYP is zero) compliant wakeup request. Writing a one to the Send LIN
Wakeup Signal bit (CR.LINWKUP), transmits a wakeup, and when completed, sets CSR.LINTC.
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NACT
PARDIS
CHKDIS
CHKTYP
DLM
FSDIS
DLC
IDENTIFIER
DATA 0
DATA N
WRITE BUFFER
RXRDY
Peripheral
bus
DLC
IDENTIFIER
DATA 0
DATA N
WRITE BUFFER
RXRDY
READ BUFFER
NODE ACTION = PUBLISH
NODE ACTION = SUBSCRIBE
Peripheral DMA
Controller
Peripheral DMA
Controller
USART LIN
CONTROLLER
NACT
PARDIS
CHKDIS
CHKTYP
DLM
FSDIS
USART LIN
CONTROLLER
TXRDY
Peripheral
bus
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DATA 0
DATA N
RXRDY
Peripheral
Bus
READ BUFFER
NACT = SUBSCRIBE
DATA 0
DATA N
TXRDY
Peripheral
bus
WRITE BUFFER
USART LIN
CONTROLLER
USART LIN
CONTROLLER
Peripheral DMA
Controller
Peripheral DMA
Controller