CHAPTER 11 FCAN CONTROLLER
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User’s Manual U14492EJ3V0UD
(18) CAN message search start/result register (CGMSS (during write)/CGMSR (during read))
The CGMSS/CGMSR register indicates the message search start/result status. Messages in the message
buffer that match the specified search criteria can be searched quickly.
These registers can be read/written in 16-bit units.
(1/2)
14
0
13
0
12
0
2
MFND2
3
MFND3
4
MFND4
5
0
6
0
7
0
8
AM
9
MM
10
0
11
0
15
0
1
MFND1
0
MFND0
CGMSR
(Read)
Address
xxxxmC1AH
Note
Initial value
0000H
14
0
13
CTRQ
12
CMSK
2
STRT2
3
STRT3
4
STRT4
5
0
6
0
7
0
8
SMNO
9
0
10
0
11
CDN
15
CIDE
1
STRT1
0
STRT0
CGMSS
(Write)
Note
xxxx: CAN message buffer registers can be allocated to the xxxx addresses as programmable
peripheral I/O registers. Note, however, that the xxxx addresses cannot be changed after being
set.
m = 2, 6, A, E
(a) Read
Bit Position
Bit Name
Function
9
MM
Confirms multiple hits from message search.
0: No messages or only one message meets the search criteria
1: Several messages meet the search criteria
If several message buffers that meet search criteria are detected, the MM bit is set (to 1).
8
AM
Confirms hits from message search.
0: No messages meet the search criteria
1: At least one message meets the search criteria
4 to 0
MFND4 to
MFND0
Indicates searched message number (0 to 31).
When multiple message buffer numbers match as a result of a search (MM = 1), the return
value of the MFND4 to MFND0 bits is the lowest message buffer number.
When no message buffer numbers match as a result of a search (AM = 0), the return
value of the MFND4 to MFND0 bits is the number of message buffers
−
1.
Содержание V850E/IA1 mPD703116
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