SAM3A4C Atmel Corporation, SAM3A4C Datasheet - Page 1261
SAM3A4C
Manufacturer Part Number
SAM3A4C
Description
Manufacturer
Atmel Corporation
- Current page: 1261 of 1465
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40.9.19
Name:
Address:
0x400B42B4 (0)[5], 0x400B42D4 (0)[6], 0x400B42F4 (0)[7], 0x400B8214 (1)[0], 0x400B8234 (1)[1], 0x400B8254 (1)[2],
0x400B8274 (1)[3], 0x400B8294 (1)[4], 0x400B82B4 (1)[5], 0x400B82D4 (1)[6], 0x400B82F4 (1)[7]
Access:
• MDL: Message Data Low Value
When MRDY field is set in the CAN_MSRx register, the lower 32 bits of a received message can be read or written by the
software application. Otherwise, the MDL value is locked by the CAN controller to send/receive a new message.
In Receive with overwrite, the CAN controller may modify MDL value while the software application reads MDH and MDL
registers. To check that MDH and MDL do not belong to different messages, the application has to check the MMI field in
the CAN_MSRx register. In this mode, the software application must re-read CAN_MDH and CAN_MDL, while the MMI bit
in the CAN_MSRx register is set.
Bytes are received/sent on the bus in the following order:
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
1. CAN_MDL[7:0]
2. CAN_MDL[15:8]
3. CAN_MDL[23:16]
4. CAN_MDL[31:24]
5. CAN_MDH[7:0]
6. CAN_MDH[15:8]
7. CAN_MDH[23:16]
8. CAN_MDH[31:24]
31
23
15
7
CAN Message Data Low Register
CAN_MDLx [x=0..7]
0x400B4214 (0)[0], 0x400B4234 (0)[1], 0x400B4254 (0)[2], 0x400B4274 (0)[3], 0x400B4294 (0)[4],
Read-write
30
22
14
6
29
21
13
5
28
20
12
4
MDL
MDL
MDL
MDL
27
19
11
3
26
18
10
2
25
17
9
1
SAM3X/A
SAM3X/A
24
16
8
0
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