RM0008
Note:
Controller area network (bxCAN)
CAN filter FIFO assignment register (CAN_FFA1R)
Address offset: 0x214
Reset value: 0x00
This register can be written only when the filter initialization mode is set (FINIT=1) in the
CAN_FMR register.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
FFA27
FFA26
FFA25
FFA24
FFA23
FFA22
FFA21
FFA20
FFA19
FFA18
FFA17
FFA16
Reserved
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
15
FFA15
rw
14
FFA14
rw
13
FFA13
rw
12
FFA12
rw
11
FFA11
rw
10
FFA10
rw
9
FFA9
rw
8
FFA8
rw
7
FFA7
rw
6
FFA6
rw
5
FFA5
rw
4
FFA4
rw
3
FFA3
rw
2
FFA2
rw
1
FFA1
rw
0
FFA0
rw
Bits 31:28
Reserved, forced by hardware to 0.
Bits 27:0 FFA x : Filter FIFO assignment for filter x
The message passing through this filter will be stored in the specified FIFO.
0: Filter assigned to FIFO 0
1: Filter assigned to FIFO 1
Note: Bits 27:14 are available in connectivity line devices only and are reserved otherwise.
CAN filter activation register (CAN_FA1R)
Address offset: 0x21C
Reset value: 0x00
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
FACT27 FACT26 FACT25 FACT24 FACT23 FACT22 FACT21 FACT20 FACT19 FACT18 FACT17 FACT16
Reserved
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
FACT15 FACT14 FACT13 FACT12 FACT11 FACT10 FACT9
FACT8
FACT7
FACT6
FACT5
FACT4
FACT3
FACT2
FACT1
FACT0
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
Bits 31:28
Reserved, forced by hardware to 0.
Bits 27:0 FACT x : Filter active
The software sets this bit to activate Filter x. To modify the Filter x registers (CAN_FxR[0:7]),
the FACTx bit must be cleared or the FINIT bit of the CAN_FMR register must be set.
0: Filter x is not active
1: Filter x is active
Note: Bits 27:14 are available in connectivity line devices only and are reserved otherwise.
Doc ID 13902 Rev 9
581/995
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