NEC V850E/PH2 User Manual page 780

(d) CANn module mask 4 register (CnMASK4L, CnMASK4H)
After reset: Undefined
15
CnMASK4L CMID15
7
CMID7
15
CnMASK4H 0
7
CMID23
CMID28 to CMID0
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: 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.
780
Chapter 18 AFCAN Controller
R/W Address: CnMASK4L <CnRBaseAddr> + 04C
CnMASK4H <CnRBaseAddr> + 04E
14 13
CMID14 CMID13
6 5
CMID6 CMID5
14 13
0 0
6 5
CMID22 CMID21
User's Manual U16580EE3V1UD00
12 11
CMID12 CMID11 CMID10
4 3
CMID4 CMID3
12 11
CMID28 CMID27 CMID26
4 3
CMID20 CMID19 CMID18
Mask pattern setting of ID bit
H
H
10 9
CMID9 CMID8
2 1
CMID2 CMID1 CMID0
10 9
CMID25 CMID24
2 1
CMID17 CMID16
8
0
8
0