Datasheet

769
32117D–AVR-01/12
AT32UC3C
Figure 29-7. Message Object Structure
Where:
• RTR is the Remote Transmission Request, 0 means data frame and 1 remote frame
• IDE is the Identifier Extension Bit, 0 means standard format and 1 means extended format
• ID is the CAN identifier of message (11 bits in standard format and 29 bits in extended
format)
• RTRM is the RTR bit Mask
• IDEM is the IDE bit Mask
• IDM are the ID bits Mask
The length of the message (DLC) is stored in the MOb Control Register (MOBCTRL).
The data stored in RAM should have the following format:
Figure 29-8. Identifier Tag (IDT)
RTR + IDE + ID
(31 bits)
STATUS
(4 bits)
CONTROL
(6 bits)
RTRM + IDEM + IDM
(31 bits)
DATA BYTES
(64 bits)
Registers
(PB)
RAM
(HSB)
MOb(i)
MOBCTRL
MOBSCR/
MOBSR
IDT
IDM
Data[31:0]
Data[63:32]
- RTR IDE ID (29 bits)
293031 28 0
- RTR IDE -
293031 28 0
ID (11 bits)
1011
Standard format
Extended format