Datasheet

MCP2515
DS21801E-page 20 © 2007 Microchip Technology Inc.
REGISTER 3-4: TXBnSIDL – TRANSMIT BUFFER n STANDARD IDENTIFIER LOW
(ADDRESS: 32h, 42h, 52h)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID2 SID1 SID0
—EXIDE —EID17EID16
bit 7 bit 0
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
bit 7-5 SID: Standard Identifier bits <2:0>
bit 4 Unimplemented: Reads as ‘0’
bit 3 EXIDE: Extended Identifier Enable bit
1 = Message will transmit extended identifier
0 = Message will transmit standard identifier
bit 2 Unimplemented: Reads as ‘0’
bit 1-0 EID: Extended Identifier bits <17:16>
REGISTER 3-5: TXBnEID8 – TRANSMIT BUFFER n EXTENDED IDENTIFIER HIGH
(ADDRESS: 33h, 43h, 53h)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8
bit 7 bit 0
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
bit 7-0 EID: Extended Identifier bits <15:8>
REGISTER 3-6: TXBnEID0 – TRANSMIT BUFFER n EXTENDED IDENTIFIER LOW
(ADDRESS: 34h, 44h, 54h)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0
bit 7 bit 0
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
bit 7-0 EID: Extended Identifier bits <7:0>