STM8S datasheet(391/467 Pages) STMICROELECTRONICS

391 / 467 page

DocID14587 Rev 14

391/467

RM0016

Controller area network (beCAN)

427

Figure 150. 16/8-bit filter bank configuration (FSCx bits = 0b01 in CAN_FCRx register)

Figure 151. 8-bit filter bank configuration (FSCx bits = 0b00 in CAN_FCRx register)

Filter registers

Filter mode1

Mapping

STID[10:3] /

EXID[28:21]

STID [2:0]

/ EXID

[20:18]

EXID

[17:15]

FMHx = 0

FMLx = 0

FMHx = 0

FMLx = 1

FMHx = 1

FMLx = 0

FMHx = 1

FMLx = 1

Identifier

CAN_FxR1

CAN_FxR2

nID

Identifier/Mask

CAN_FxR3

CAN_FxR4

n+1

Identifier

CAN_FxR5

n+1

n+2

n+1

n+2

Identifier/Mask

CAN_FxR6

n+2

n+3

Identifier

CAN_FxR7

n+2

n+3

n+4

Identifier/Mask

CAN_FxR8

n+4

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 mode1

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

nID

Identifier/Mask

CAN_FxR2

n+1

Identifier

CAN_FxR3

n+1

n+2

n+1

n+2

Identifier/Mask

CAN_FxR4

n+3

Identifier

CAN_FxR5

n+2

n+4

n+2

n+4

Identifier/Mask

CAN_FxR6

n+3

n+5

Identifier

CAN_FxR7

n+3

n+5

n+4

n+6

Identifier/Mask

CAN_FxR8

n+5

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

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