ST92F124 datasheet(354/429 Pages) STMICROELECTRONICS

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CONTROLLER AREA NETWORK (bxCAN)

CONTROLLER AREA NETWORK (Cont’d)

CAN FILTER CONFIGURATION REG.2 (CFCR2)

All bits of this register are set and cleared by soft-

ware.

Read / Write

Reset Value: 0000 0000 (00h)

Note: To modify FFAx and FSCx bits bxCAN must

be in INIT mode.

Bit 7 = FFA5 Filter FIFO Assignment for Filter 5

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

Bit 6:5 = FSC5[1:0] Filter Scale Configuration

These bits define the scale configuration of Filter

Bit 4 = FACT5 Filter Active

The software sets this bit to activate Filter 5. To

modify the filter 5 registers (CF5R[7:0]), the

FACT5 bit must be cleared.

0: Filter 5 is not active

1: Filter 5 is active

Bit 3 = FFA4 Filter FIFO Assignment for Filter 4

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

Bit 2:1 = FSC4[1:0] Filter Scale Configuration

These bits define the scale configuration of Filter

Bit 0 = FACT4 Filter Active

The software sets this bit to activate filter 4. To

modify the Filter 4 registers (CF4R[7:0]), the

FACT4 bit must be cleared).

0: Filter 4 is not active

1: Filter 4 is active

CAN FILTER CONFIGURATION REG.3 (CFCR3)

All bits of this register are set and cleared by soft-

ware.

Read / Write

Reset Value: 0000 0000 (00h)

Bit 7 = FFA7 Filter FIFO Assignment for Filter 7

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

Bit 6:5 = FSC7[1:0] Filter Scale Configuration

These bits define the scale configuration of Filter

Bit 4 = FACT7 Filter Active

The software sets this bit to activate Filter 7. To

modify the Filter 7 registers (CF7R[7:0]), the

FACT7 bit must be cleared.

0: Filter 7 is not active.

1: Filter 7 is active.

Bit 3 = FFA6 Filter FIFO Assignment for Filter 6

This bit allows the software to define whether the

message passing through this filter will be as-

signed to the receive FIFO0 or FIFO1.

0: Filter assigned to FIFO 0

1: Filter assigned to FIFO 1

Bit 2:1 = FSC6[1:0] Filter Scale Configuration

These bits define the scale configuration of Filter

Bit 0 = FACT6 Filter Active

The software sets this bit to activate Filter 6. To

modify the Filter 6 registers (CF6R[7:0]), the

FACT6 bit must be cleared.

0: Filter 6 is not active

1: Filter 6 is active

FFA5 FSC51 FSC50 FACT5 FFA4 FSC41 FSC40 FACT4

FFA7 FSC71 FSC70 FACT7 FFA6 FSC61 FSC60 FACT6

ST92F124 数据表(PDF) 354 Page - STMicroelectronics

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