SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 1262
SAM3X8E
Manufacturer Part Number
SAM3X8E
Description
Manufacturer
Atmel Corporation
- Current page: 1262 of 1465
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40.9.20
Name:
Address:
0x400B42B8 (0)[5], 0x400B42D8 (0)[6], 0x400B42F8 (0)[7], 0x400B8218 (1)[0], 0x400B8238 (1)[1], 0x400B8258 (1)[2],
0x400B8278 (1)[3], 0x400B8298 (1)[4], 0x400B82B8 (1)[5], 0x400B82D8 (1)[6], 0x400B82F8 (1)[7]
Access:
• MDH: Message Data High Value
When MRDY field is set in the CAN_MSRx register, the upper 32 bits of a received message are read or written by the soft-
ware application. Otherwise, the MDH value is locked by the CAN controller to send/receive a new message.
In Receive with overwrite, the CAN controller may modify MDH 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:
1262
1262
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
SAM3X/A
SAM3X/A
CAN Message Data High Register
CAN_MDHx [x=0..7]
0x400B4218 (0)[0], 0x400B4238 (0)[1], 0x400B4258 (0)[2], 0x400B4278 (0)[3], 0x400B4298 (0)[4],
Read-write
30
22
14
6
29
21
13
5
28
20
12
4
MDH
MDH
MDH
MDH
27
19
11
3
26
18
10
2
25
17
9
1
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
24
16
8
0
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