SAM3A8C Atmel Corporation, SAM3A8C Datasheet - Page 1258
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SAM3A8C
Manufacturer Part Number
SAM3A8C
Description
Manufacturer
Atmel Corporation
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40.9.18
Name:
Address:
0x400B42B0 (0)[5], 0x400B42D0 (0)[6], 0x400B42F0 (0)[7], 0x400B8210 (1)[0], 0x400B8230 (1)[1], 0x400B8250 (1)[2],
0x400B8270 (1)[3], 0x400B8290 (1)[4], 0x400B82B0 (1)[5], 0x400B82D0 (1)[6], 0x400B82F0 (1)[7]
Access:
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
• MRTR: Mailbox Remote Transmission Request
1258
1258
Mailbox Object Type
Receive
Receive with overwrite
Transmit
Consumer
Producer
Mailbox Object Type
Receive
Receive with overwrite
MRDY
31
23
15
–
7
SAM3X/A
SAM3X/A
CAN Message Status Register
CAN_MSRx [x=0..7]
0x400B4210 (0)[0], 0x400B4230 (0)[1], 0x400B4250 (0)[2], 0x400B4270 (0)[3], 0x400B4290 (0)[4],
Read-only
MABT
30
22
14
–
6
Description
The first frame received has the RTR bit set.
The last frame received has the RTR bit set.
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
–
–
5
MRTR
28
20
12
–
4
MTIMESTAMP
MTIMESTAMP
27
19
11
–
3
26
18
10
–
2
MDLC
25
17
–
9
1
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
MMI
24
16
8
0
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