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Chapter 19
CAN Controller (CAN)
Preliminary User’s Manual U17566EE1V2UM00
(c) CANn module mask 3 register (CnMASK3L, CnMASK3H)
(d) CANn module mask 4 register (CnMASK4L, CnMASK4H)
Note
Masking is always defined by an ID length of 29 bits. If a mask is assigned to a
message with a standard ID, the CMID17 to CMID0 bits are ignored.
Therefore, only the CMID28 to CMID18 bits of the received ID are masked.
The same mask can be used for both the standard and extended IDs.
After reset: Undefined
R/W
Address: CnMASK3L <CnRBaseAddr> + 048
H
CnMASK3H <CnRBaseAddr> + 04A
H
15
14
13
12
11
10
9
8
CnMASK3L
CMID15
CMID14
CMID13
CMID12
CMID11
CMID10
CMID9
CMID8
7
6
5
4
3
2
1
0
CMID7
CMID6
CMID5
CMID4
CMID3
CMID2
CMID1
CMID0
15
14
13
12
11
10
9
8
CnMASK3H
0
0
0
CMID28
CMID27
CMID26
CMID25
CMID24
7
6
5
4
3
2
1
0
CMID23
CMID22
CMID21
CMID20
CMID19
CMID18
CMID17
CMID16
After reset: Undefined
R/W
Address: CnMASK4L <CnRBaseAddr> + 04C
H
CnMASK4H <CnRBaseAddr> + 04E
H
15
14
13
12
11
10
9
8
CnMASK4L
CMID15
CMID14
CMID13
CMID12
CMID11
CMID10
CMID9
CMID8
7
6
5
4
3
2
1
0
CMID7
CMID6
CMID5
CMID4
CMID3
CMID2
CMID1
CMID0
15
14
13
12
11
10
9
8
CnMASK4H
0
0
0
CMID28
CMID27
CMID26
CMID25
CMID24
7
6
5
4
3
2
1
0
CMID23
CMID22
CMID21
CMID20
CMID19
CMID18
CMID17
CMID16
CMID28 to CMID0
Mask pattern setting of ID bit
0
The ID bits of the message buffer set by the CMID28 to CMID0 bits are compared with the
ID bits of the received message frame.
1
The ID bits of the message buffer set by the CMID28 to CMID0 bits are not compared with
the ID bits of the received message frame (they are masked).
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