at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 706

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

37.8.16
Name:
Access Type:
These register fields are updated each time a message transfer is received or aborted.
MMI is cleared by reading the CAN_MSRx register.
MRDY, MABT are cleared by writing MTCR or MACR in the CAN_MCRx register.
Warning: MRTR and MDLC state depends partly on the mailbox object type.
• MTIMESTAMP: Timer value
This field is updated only when time-triggered operations are disabled (TTM cleared in CAN_MR register). If the TEOF field
in the CAN_MR register is cleared, TIMESTAMP is the internal timer value at the start of frame of the last message
received or sent by the mailbox. If the TEOF field in the CAN_MR register is set, TIMESTAMP is the internal timer value at
the end of frame of the last message received or sent by the mailbox.
In Time Triggered Mode, MTIMESTAMP is set to 0.
• MDLC: Mailbox Data Length Code
706
Mailbox Object Type
Receive
Receive with overwrite
Transmit
Consumer
Producer
MTIMESTAMP
MTIMESTAMP
MRDY
31
23
15
15
–
7
7
AT91SAM9263 Preliminary
CAN Message Status Register
MTIMESTAMP
MTIMESTAMP
MABT
30
22
14
14
Read only
–
6
6
CAN_MSRx
MTIMESTAMP
MTIMESTAMP
Description
Length of the first mailbox message received
Length of the last mailbox message received
No action
Length of the mailbox message received
Length of the mailbox message to be sent after the remote frame reception
29
21
13
13
–
–
5
5
MTIMESTAMP
MTIMESTAMP
MRTR
28
20
12
12
–
4
4
MTIMESTAMP
MTIMESTAMP
27
19
11
11
–
3
3
MTIMESTAMP
MTIMESTAMP
26
18
10
10
–
2
2
MDLC
MTIMESTAMP
MTIMESTAMP
25
17
–
9
1
9
1
6249D–ATARM–20-Dec-07
MTIMESTAMP
MTIMESTAMP
MMI
24
16
8
8
0
0