ST STM8S Reference Manual

RM0016 Controller area network (beCAN)
Doc ID 14587 Rev 8 375/449
Figure 149. 16/8-bit filter bank configuration (FSCx bits = 0b01 in CAN_FCRx register)
Figure 150. 8-bit filter bank configuration (FSCx bits = 0b00 in CAN_FCRx register)
Filter registers Filter mode
1
Mapping
STID[10:3] /
EXID[28:21]
STID [2:0]
/ EXID
[20:18]
RTR
IDE
EXID
[17:15]
FMHx = 0
FMLx = 0
FMHx = 0
FMLx = 1
FMHx = 1
FMLx = 0
FMHx = 1
FMLx = 1
Identifier CAN_FxR1 CAN_FxR2 ID
n
ID
nID
n
ID
n
Identifier/Mask CAN_FxR3 CAN_FxR4 M ID
n+1 M ID n+1
Identifier CAN_FxR5 ID
n+1
ID
n+2
ID
n+1 ID n+2
Identifier/Mask CAN_FxR6 M M ID
n+2 ID n+3
Identifier CAN_FxR7 ID
n+2
ID
n+3
ID
n+3 ID n+4
Identifier/Mask CAN_FxR8 M M ID
n+4 ID n+5
ID= Identifier
M = Mask
n = Filter number
x = Filter bank number
1
The FMHx and FMLx bits are located in the CAN_FMR1 and CAN_FMR2 registers
Filter registers Filter mode
1
Mapping
STID[10:3] /
EXID[28:21]
FMHx = 0
FMLx = 0
FMHx = 0
FMLx = 1
FMHx = 1
FMLx = 0
FMHx = 1
FMLx = 1
Identifier CAN_FxR1 ID
n
ID
nID
n
ID
n
Identifier/Mask CAN_FxR2 M ID
n+1 M ID n+1
Identifier CAN_FxR3 ID
n+1
ID
n+2 ID
n+1
ID
n+2
Identifier/Mask CAN_FxR4 M ID
n+3 M ID n+3
Identifier CAN_FxR5 ID
n+2
ID
n+4
ID
n+2 ID n+4
Identifier/Mask CAN_FxR6 M M ID
n+3 ID n+5
Identifier CAN_FxR7 ID
n+3
ID
n+5
ID
n+4 ID n+6
Identifier/Mask CAN_FxR8 M M ID
n+5 ID n+7
ID= Identifier
M = Mask
n = Filter number
x = Filter bank number
1
The FMHx and FMLx bits are located in the CAN_FMR1 and CAN_FMR2 registers

ST STM8S Specifications

General

Brand	ST
Model	STM8S
Category	Microcontrollers
Language	English