Controller area network (bxCAN)
CAN filter mode register (CAN_FM1R)
Address offset: 0x204
Reset value: 0x00
RM0008
Note:
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
FBM27 FBM26 FBM25 FBM24 FBM23 FBM22 FBM21 FBM20 FBM19 FBM18 FBM17 FBM16
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
FBM15 FBM14 FBM13 FBM12 FBM11 FBM10
FBM9
FBM8
FBM7
FBM6
FBM5
FBM4
FBM3
FBM2
FBM1
FBM0
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
Note:
Bits 31:28
Reserved. Forced to 0 by hardware.
Bits 27:0 FBM x : Filter mode
Mode of the registers of Filter x.
0: Two 32-bit registers of filter bank x are in Identifier Mask mode.
1: Two 32-bit registers of filter bank x are in Identifier List mode.
Note: Bits 27:14 are available in connectivity line devices only and are reserved otherwise.
CAN filter scale register (CAN_FS1R)
Address offset: 0x20C
Reset value: 0x00
Note:
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
FSC27
FSC26
FSC25
FSC24
FSC23
FSC22
FSC21
FSC20
FSC19
FSC18
FSC17
FSC16
Reserved
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
15
FSC15
rw
14
FSC14
rw
13
FSC13
rw
12
FSC12
rw
11
FSC11
rw
10
FSC10
rw
9
FSC9
rw
8
FSC8
rw
7
FSC7
rw
6
FSC6
rw
5
FSC5
rw
4
FSC4
rw
3
FSC3
rw
2
FSC2
rw
1
FSC1
rw
0
FSC0
rw
Note:
Bits 31:28
Reserved, forced by hardware to 0.
Bits 27:0 FSCx : Filter scale configuration
These bits define the scale configuration of Filters 13-0.
0: Dual 16-bit scale configuration
1: Single 32-bit scale configuration
Note: Bits 27:14 are available in connectivity line devices only and are reserved otherwise.
580/995
Doc ID 13902 Rev 9
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