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RM0016 Datasheet(PDF) 423 Page - STMicroelectronics |
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RM0016 Datasheet(HTML) 423 Page - STMicroelectronics |
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423 / 467 page  DocID14587 Rev 14 423/467 RM0016 Controller area network (beCAN) 427 CAN filter bank i register x (CAN_FiRx) (i = 0 .. 5, x = 1 .. 8) Address offset: See Figure 158. Reset value: 0xXX 7 654 3210 FB(7:0] rw rw rw rw rw rw rw rw Bits 7:0 FB[7:0]: Filter bits – Identifier Each bit of the register specifies the level of the corresponding bit of the expected identifier. 0: Dominant bit is expected 1: Recessive bit is expected –Mask Each bit of the register specifies whether the bit of the associated identifier register must match with the corresponding bit of the expected identifier or not. 0: Don’t care, the bit is not used for the comparison 1: Must match, the bit of the incoming identifier must have the same level has specified in the corresponding identifier register of the filter. Note: Each filter i is composed of 8 registers, CAN_FiR1..8. Depending on the scale and mode configuration of the filter the function of each register can differ. For the filter mapping, functions description and mask registers association, refer to Section Figure 23.6.3: Identifier filtering. A Mask/Identifier register in mask mode has the same bit mapping as in identifier list mode. Note: To modify these registers, the corresponding FACT bit in the CAN_FCRx register must be cleared. |
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