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PIC18F258-E/LSQTP Datasheet(PDF) 217 Page - Microchip Technology |
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PIC18F258-E/LSQTP Datasheet(HTML) 217 Page - Microchip Technology |
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217 / 402 page ![]() © 2006 Microchip Technology Inc. DS41159E-page 215 PIC18FXX8 19.2.3.1 Message Acceptance Filters and Masks This subsection describes the message acceptance filters and masks for the CAN receive buffers. REGISTER 19-21: RXFnSIDH: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER, HIGH BYTE REGISTERS REGISTER 19-22: RXFnSIDL: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER, LOW BYTE REGISTERS R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3 bit 7 bit 0 bit 7-0 SID10:SID3: Standard Identifier Filter bits if EXIDEN = 0 or Extended Identifier Filter bits EID28:EID21 if EXIDEN = 1 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown R/W-x R/W-x R/W-x U-0 R/W-x U-0 R/W-x R/W-x SID2 SID1 SID0 — EXIDEN —EID17 EID16 bit 7 bit 0 bit 7-5 SID2:SID0: Standard Identifier Filter bits if EXIDEN = 0 or Extended Identifier Filter bits EID20:EID18 if EXIDEN = 1 bit 4 Unimplemented: Read as ‘0’ bit 3 EXIDEN: Extended Identifier Filter Enable bit 1 = Filter will only accept extended ID messages 0 = Filter will only accept standard ID messages bit 2 Unimplemented: Read as ‘0’ bit 1-0 EID17:EID16: Extended Identifier Filter bits Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown |
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