NEC V850ES/F 3-L Series User Manual page 569

CAN Controller (CAN)
Access
Address
Initial Value
Access
Address
Initial Value
CMID28 to CMID0 Mask pattern setting of ID bit
The ID bits of the message buffer set by the CMID28 to CMID0 bits are compared with the
0
ID bits of the received message frame.
The ID bits of the message buffer set by the CMID28 to CMID0 bits are not compared with
1
the ID bits of the received message frame (they are masked).
Note
(c) CANn module mask 3 register (CnMASK3L, CnMASK3H)
These registers can be read/written in 16-bit units.
CnMASK3L: <CnRBaseAddr> + 048
CnMASK3H: <CnRBaseAddr> + 04A
Undefined.
CnMASK3L
15 14
CMID15 CMID14 CMID13
7 6
CMID7 CMID6 CMID5
CnMASK3H
15 14
0 0
7 6
CMID23 CMID22 CMID21
(d) CANn module mask 4 register (CnMASK4L, CnMASK4H)
These registers can be read/written in 16-bit units.
CnMASK4L: <CnRBaseAddr> + 04C
CnMASK4H: <CnRBaseAddr> + 04E
Undefined.
CnMASK4L
15 14
CMID15 CMID14 CMID13
7 6
CMID7 CMID6 CMID5
CnMASK4H
15 14
0 0
7 6
CMID23 CMID22 CMID21
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.
User's Manual U18743EE1V2UM00
H
H
13 12 11
CMID12 CMID11
5 4 3
CMID4 CMID3
13 12 11
0 CMID28 CMID27
5 4 3
CMID20 CMID19
H
H
13 12 11
CMID12 CMID11
5 4 3
CMID4 CMID3
13 12 11
0 CMID28 CMID27
5 4 3
CMID20 CMID19
Chapter 18
10 9
CMID10 CMID9 CMID8
2 1
CMID2 CMID1 CMID0
10 9
CMID26 CMID25 CMID24
2 1
CMID18 CMID17 CMID16
10 9
CMID10 CMID9 CMID8
2 1
CMID2 CMID1 CMID0
10 9
CMID26 CMID25 CMID24
2 1
CMID18 CMID17 CMID16
8
0
8
0
8
0
8
0
569