SAM3A4C Atmel Corporation, SAM3A4C Datasheet - Page 1254
SAM3A4C
Manufacturer Part Number
SAM3A4C
Description
Manufacturer
Atmel Corporation
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40.9.14
Name:
Address:
0x400B42A0 (0)[5], 0x400B42C0 (0)[6], 0x400B42E0 (0)[7], 0x400B8200 (1)[0], 0x400B8220 (1)[1], 0x400B8240 (1)[2],
0x400B8260 (1)[3], 0x400B8280 (1)[4], 0x400B82A0 (1)[5], 0x400B82C0 (1)[6], 0x400B82E0 (1)[7]
Access:
This register can only be written if the WPEN bit is cleared in
• MTIMEMARK: Mailbox Timemark
This field is active in Time Triggered Mode. Transmit operations are allowed when the internal timer counter reaches the
Mailbox Timemark. See
In Timestamp Mode, MTIMEMARK is set to 0.
• PRIOR: Mailbox Priority
This field has no effect in receive and receive with overwrite modes. In these modes, the mailbox with the lowest number is
serviced first.
When several mailboxes try to transmit a message at the same time, the mailbox with the highest priority is serviced first. If
several mailboxes have the same priority, the mailbox with the lowest number is serviced first (i.e., MBx0 is serviced before
MBx 15 if they have the same priority).
• MOT: Mailbox Object Type
This field allows the user to define the type of the mailbox. All mailboxes are independently configurable. Five different
types are possible for each mailbox:
1254
1254
Value
31
23
15
0
1
2
3
–
–
7
SAM3X/A
SAM3X/A
CAN Message Mode Register
CAN_MMRx [x=0..7]
0x400B4200 (0)[0], 0x400B4220 (0)[1], 0x400B4240 (0)[2], 0x400B4260 (0)[3], 0x400B4280 (0)[4],
Read-write
MB_DISABLED
MB_RX
MB_RX_OVERWRITE
MB_TX
30
22
14
–
–
6
“Transmitting within a Time Window” on page
Name
29
21
13
–
–
5
Mailbox is disabled. This prevents receiving or transmitting any messages with this
mailbox.
Reception Mailbox. Mailbox is configured for reception. If a message is received
while the mailbox data register is full, it is discarded.
Reception mailbox with overwrite. Mailbox is configured for reception. If a message
is received while the mailbox is full, it overwrites the previous message.
Transmit mailbox. Mailbox is configured for transmission.
28
20
12
–
–
4
MTIMEMARK
MTIMEMARK
”CAN Write Protection Mode
27
19
11
–
3
1231.
Description
26
18
10
2
PRIOR
Register”.
MOT
25
17
9
1
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
24
16
8
0
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